Toyota Avalon (XX50): Power Steering System(for Gasoline Model)

C1511

Torque Sensor1

Torque sensor malfunction

Rack and pinion power steering gear assembly

EPS warning light: Comes on

Engine switch on (IG) again

-

C1512

Torque Sensor2

Torque sensor malfunction

Rack and pinion power steering gear assembly

EPS warning light: Comes on

Engine switch on (IG) again

-

C1513

Torque Sensor Deviation Excessive

Torque sensor malfunction

Rack and pinion power steering gear assembly

EPS warning light: Comes on

Engine switch on (IG) again

-

C1514

Torque Sensor Power Supply Voltage

Torque sensor malfunction

Rack and pinion power steering gear assembly

EPS warning light: Comes on

Engine switch on (IG) again

-

C1517

Torque Hold

Torque sensor malfunction

Rack and pinion power steering gear assembly

EPS warning light: Comes on

Engine switch on (IG) again

-

C1521

Short in Motor Circuit

Motor overcurrent

Rack and pinion power steering gear assembly

EPS warning light: Comes on

Engine switch on (IG) again

-

C1522

Power Supply Sensor

Motor current sensor malfunction

Rack and pinion power steering gear assembly

EPS warning light: Comes on

Engine switch on (IG) again

-

C1523

Current Deviation Excessive

Excessively large current deviation

Rack and pinion power steering gear assembly

EPS warning light: Comes on

Engine switch on (IG) again

-

C1528

Motor Rotation Angle Sensor

Motor rotation angle sensor malfunction

Rack and pinion power steering gear assembly

EPS warning light: Comes on

Engine switch on (IG) again

-

C1531

ECU Malfunction

ECU internal malfunction (CPU malfunction)

Rack and pinion power steering gear assembly

EPS warning light: Comes on

Engine switch on (IG) again

-

C1532

ECU Malfunction

ECU internal malfunction (Peripheral circuit malfunction)

Rack and pinion power steering gear assembly

EPS warning light: Comes on

Engine switch on (IG) again

-

C1533

Temperature Sensor Circuit is Low or High

ECU internal malfunction (Substrate temperature sensor malfunction)

Rack and pinion power steering gear assembly

EPS warning light: Comes on

The ECU judges the system has returned to normal

-

C1534

EEPROM

ECU internal malfunction (EEPROM error)

Rack and pinion power steering gear assembly

EPS warning light: Comes on

Engine switch on (IG) again

-

C1555

Motor Relay Welding Failure

Motor relay circuit malfunction

Rack and pinion power steering gear assembly

EPS warning light: Comes on

Engine switch on (IG) again

-

1.

CHECK FOR DTC

DTCs other than C1511, C1512, C1513, C1514, C1517, C1521, C1522, C1523, C1528, C1531, C1532, C1533, C1534 or C1555 are not output.

A

DTCs other than C1511, C1512, C1513, C1514, C1517, C1521, C1522, C1523, C1528, C1531, C1532, C1533, C1534 or C1555 are output.

B

DTCs are not output.

C

REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY

GO TO DIAGNOSTIC TROUBLE CODE CHART

USE SIMULATION METHOD TO CHECK

C1515

Torque Sensor Zero Point Adjustment Undone

This DTC is stored when torque sensor zero point calibration has not been performed.

Torque sensor zero point calibration

EPS warning light: Comes on

Zero point calibration is performed or the engine switch on (IG) again

There is no malfunction if this DTC is not output again after performing zero point calibration.

1.

CHECK FOR DTC

Torque Sensor Adjustment

DTCs are still output after performing steering zero point calibration 3 times.

A

Normal system code is output.

B

REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY

END

C1516

Torque Sensor Zero Point Adjustment Incomplete

Torque sensor zero point calibration is incomplete due to the steering wheel being touched during calibration.

Torque sensor zero point calibration

EPS warning light: Comes on

The DTC is cleared

There is no malfunction if this DTC is not output again after clearing the DTC and torque sensor calibration value, and performing zero point calibration.

1.

REPLACE CHECK FOR DTC

Torque Sensor Adjustment

DTCs are still output after performing steering zero point calibration 3 times.

A

Normal system code is output.

B

REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY

END

C1541

Vehicle Speed Signal

A vehicle speed signal malfunction is detected

• Brake control system
• CAN communication system

EPS warning light: Comes on

The ECU judges the system has returned to normal

-

1.

CHECK CAN COMMUNICATION SYSTEM

DTC U0129 is not output.

A

DTC U0129 is output.

B

GO TO BRAKE CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART)

GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

C1551

IG Power Supply Voltage

When the PIG power supply voltage is normal, the IG power supply voltage is 18.5 V or higher

• Harness or connector
• Rack and pinion power steering gear assembly

EPS warning light: Comes on

The ECU judges the system has returned to normal

-

1.

CHECK HARNESS AND CONNECTOR (BATTERY - RACK AND PINION POWER STEERING GEAR ASSEMBLY)

*a

Front view of wire harness connector

(to Rack and Pinion Power Steering Gear Assembly)

-

-

C67-4 (IG) - Body ground

Engine switch on (IG)

Below 18.5 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.

CHECK FOR DTC

DTC is output.

A

DTC is not output.

B

REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY

USE SIMULATION METHOD TO CHECK

C1552

PIG Power Supply Voltage

PIG power source circuit malfunction

• EPS fuse
• Harness or connector
• Rack and pinion power steering gear assembly

EPS warning light: Comes on

Engine switch on (IG) again

-

C1554

Power Supply Relay Failure

Power source relay circuit malfunction

• EPS fuse
• Harness or connector
• Rack and pinion power steering gear assembly

EPS warning light: Comes on

Engine switch on (IG) again

-

1.

CHECK HARNESS AND CONNECTOR (RACK AND PINION POWER STEERING GEAR ASSEMBLY - BODY GROUND)

*a

Front view of wire harness connector (to Rack and Pinion Power Steering Gear Assembly)

-

-

C67-8 (PIG) - Body ground

Always

9 to 16 V

C67-7 (PGND) - Body ground

Always

Below 1 Ω

REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

C1567

Error in Matching of ECUs

• An incompatible ECM is detected
• An incompatible main body ECU (multiplex network body ECU) is detected
• An incompatible skid control ECU (brake actuator assembly) is detected

• Incorrect ECM
• Incorrect main body ECU (multiplex network body ECU)
• Incorrect skid control ECU (brake actuator assembly)
• Rack and pinion power steering gear assembly

EPS warning light: Comes on

Engine switch on (IG) again

-

1.

CHECK RELATED PART

Related Part

ECM

Main body ECU (Multiplex network body ECU)

Skid control ECU (Brake actuator assembly)

The related part has the correct part number.

A

The related part has an incorrect part number.

B

GO TO STEP 3

2.

CHECK FOR DTC

System DTCs of the related part are output.

A

System DTCs of the related part are not output.

B

REPAIR CIRCUIT INDICATED BY OUTPUT CODE

REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY

3.

REPLACE RELATED PART WITH PART THAT HAS CORRECT PART NUMBER

4.

CHECK FOR DTC

DTCs are not output.

A

DTCs are output.

B

END

REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY

C1581

Assist Map Number Un-Writing

Assist map not written in power steering ECU (rack and pinion power steering gear assembly)

• CAN communication system
• ECM
• Main body ECU (Multiplex network body ECU)
• Skid control ECU (Brake actuator assembly)
• AVS ECU (Absorber control ECU) (w/ Adaptive Variable Suspension System)
• Rack and pinion power steering gear assembly

EPS warning light: Comes on

Assist Map Writing is performed

-

1.

PERFORM ASSIST MAP WRITING

Signal Check

DTC C1581 is output.

A

DTC C1581 is not output.

B

END

2.

CHECK CAN COMMUNICATION SYSTEM

CAN communication system DTCs are not output.

A

CAN communication system DTCs are output.

B

GO TO CAN COMMUNICATION SYSTEM

3.

CHECK RELATED PART

Related Part

ECM

Main body ECU (Multiplex network body ECU)

Skid control ECU (Brake actuator assembly)

AVS ECU (Absorber control ECU) (w/ Adaptive Variable Suspension System)

The related part has the correct part number.

A

The related part has an incorrect part number.

B

GO TO STEP 5

4.

CHECK FOR DTC

System DTCs of the related part are output.

A

System DTCs of the related part are not output.

B

REPAIR CIRCUIT INDICATED BY OUTPUT CODE

REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY

5.

REPLACE RELATED PART WITH PART THAT HAS CORRECT PART NUMBER

6.

CHECK FOR DTC

DTCs are not output.

A

DTCs are output.

B

END

REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY

C1582

Assist Map Number Mismatch

Assist map number mismatch

• CAN communication system
• Incorrect ECM
• Incorrect main body ECU (multiplex network body ECU)
• Incorrect skid control ECU (brake actuator assembly)
• AVS ECU (Absorber control ECU) (w/ Adaptive Variable Suspension System)
• Rack and pinion power steering gear assembly

EPS warning light: Does not come on

Engine switch on (IG) again

-

1.

CHECK CAN COMMUNICATION SYSTEM

CAN communication system DTCs are not output.

A

CAN communication system DTCs are output.

B

GO TO CAN COMMUNICATION SYSTEM

2.

CHECK RELATED PART

Related Part

ECM

Main body ECU (Multiplex network body ECU)

Skid control ECU (Brake actuator assembly)

AVS ECU (Absorber control ECU) (w/ Adaptive Variable Suspension System)

The related part has an incorrect part number.

A

The related part has the correct part number, or a related part and rack and pinion power steering gear assembly have not been replaced.

B

REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY

3.

REPLACE RELATED PART WITH PART THAT HAS CORRECT PART NUMBER

4.

CHECK FOR DTC

DTCs are not output.

A

DTCs are output.

B

END

REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY

IG Power Supply

IG power source voltage

Min.: 0.0000 V

Max.: 20.1531 V

8 to 16 V

Engine switch on (IG)

IG Power Supply

Torque Sensor Adjustment

DTC C1515 is output.

DTC C1516 is output.

DTC C1534 is output.

DTC C1581 is output.

Signal Check

1.

READ VALUE USING TECHSTREAM (ASSIST LIMIT RECORD 1)

Assist Limit Record 1

Information of assist limit that was used in the past or is currently in use (latest history)

Unrec, Mtr Overheat, Pow Vol Low, Pow Vol Low Prevent, Eng Stall, Ready OFF, Mtr Overload, DC-DC Malf, Vhcl Spd Sig Malf, Batt Vol Keep

-

-

Assist Limit Record 1

Unrec

No assist limit. Continue with troubleshooting for "Heavy steering".

-

Mtr Overheat

When the vehicle is stopped or traveling at low speed, and steering operations are performed repeatedly or the steering wheel is turned all the way to the side and held there for a long time, assist may be limited in order to prevent overheating of the power steering motor assembly and power steering ECU assembly.

After 10 minutes elapse with the engine running and no steering operations being performed, the system will return to normal.

After recovering from the overheated condition, assist can be performed as usual.

-

Pow Vol Low

When insufficient battery charge, or battery degradation etc. causes the voltage to temporarily decrease, assist may be stopped.

After the battery condition returns to normal, assist can be performed as usual.

-

Pow Vol Low Prevent

When insufficient battery charge, or battery degradation etc. causes the voltage to temporarily decrease, assist may be limited.

After the battery condition returns to normal, assist can be performed as usual.

-

Eng Stall

When the engine stalls, battery charge becomes insufficient, so assist is stopped.

After recovering from the engine stall, assist can be performed as usual.

-

Ready OFF

After Ready ON, if a malfunction in the HV system etc. causes a return to Ready OFF, the HV battery charge becomes insufficient, so assist is stopped.

After returning to Ready ON state, assist can be performed as usual.

Not displayed for this vehicle

Mtr Overload

When the steering wheel cannot turn, such as when a road wheel is against a curb, if the driver continues to apply force to the steering wheel, current to the motor may be limited to prevent overheating.

When the steering wheel is returned to a neutral position, assist can be performed as usual.

-

DC-DC Malf

If there is a malfunction in the DC-DC converter, etc., assist may be limited.

After the DC-DC converter returns to normal, assist can be performed as usual.

Not displayed for this vehicle

Vhcl Spd Sig Malf

If the vehicle speed signal is abnormal due to a wheel speed sensor malfunction, etc., assist may be limited.

-

Batt Vol Keep

When insufficient battery charge, or battery degradation etc. causes the voltage to temporarily decrease, assist may be limited.

After the battery condition returns to normal, assist can be performed as usual.

-

Assist Limit Record 1

Record 1 Key Cycle

Record 1 Key Cycle Elapsed Time

END

Powertrain

Acceleration response, etc.

Normal

Power / Normal / Eco

Chassis

Damping force of suspension, steering assist force, etc.

Normal

Sport / Normal

Climate

Effectiveness of air conditioning system, etc.

Normal

Normal / Eco

Meter Vehicle Velocity

Vehicle speed from speedometer

Min.: 0.0 km/h (0.0 MPH)

Max.: 300.0 km/h (186.4 MPH)

• 0 km/h (0 MPH): Engine running and vehicle stopped
• No significant fluctuation: Engine running and vehicle driven at a constant speed

-

Wheel Speed Right

Rear right wheel speed

Min.: 0 km/h (0 MPH)

Max.: 255 km/h (158 MPH)

• 0 km/h (0 MPH): Engine running and vehicle stopped
• No significant fluctuation: Engine running and vehicle driven at a constant speed

-

Wheel Speed Left

Rear left wheel speed

Min.: 0 km/h (0 MPH)

Max.: 255 km/h (158 MPH)

• 0 km/h (0 MPH): Engine running and vehicle stopped
• No significant fluctuation: Engine running and vehicle driven at a constant speed

-

Engine Revolution

Engine speed

Min.: 0 rpm

Max.: 12800 rpm

No significant fluctuation

Engine running at a constant speed

Motor Actual Current

Amount of current to motor

Min.: -327.68 A

Max.: 327.67 A

Value changes in proportion to steering effort

- The value increases when turning right and decreases when turning left

Engine running and steering wheel being turned

Command Value Current

Requested current to motor

Min.: -327.68 A

Max.: 327.67 A

Value changes in proportion to steering effort

- The value increases when turning right and decreases when turning left

Engine running and steering wheel being turned

Steering Angle Velocity

Steering angle speed

Min.: -32768 deg/s

Max.: 32767 deg/s

Value changes in proportion to steering speed

- The value increases when turning left and decreases when turning right

Engine running and steering wheel being turned

Thermistor Temperature

ECU substrate temperature

Min.: -50.0°C (-58.0°F)

Max.: 150.0°C (302.0°F)

-50°C to 150°C (-58°F to 302°F)

-

IG Power Supply

IG power source voltage

Min.: 0.0000 V

Max.: 20.1531 V

8 to 16 V

Engine switch on (IG)

Steering Angle Sens Sig

Steering sensor signal state

OK or NG(1) or NG(2) or NG(3)

OK: Steering sensor signal received

NG(1): The learning has not completed

NG(2): Steering sensor abnormal

NG(3): Communication error

-

Steering Wheel Torque

Steering wheel torque

Min.: -327.68 Nm

Max.: 7.00 Nm

Value changes in proportion to steering effort

- The value increases when turning left and decreases when turning right

Engine running and steering wheel being turned

Motor Rotation Angle

Motor rotation angle

Min.: 0.000 deg

Max.: 1441.770 deg

During steering operation, motor rotation angle value changes from 0 to 360°

Engine running and steering wheel being turned

Command Val Current 2

Requested current to motor

Min.: -327.68 A

Max.: 327.67 A

Value changes in proportion to steering effort

Engine running and steering wheel being turned

Motor Voltage

Motor power supply voltage

Min.: 0.000 V

Max.: 98.000 V

• Approximately 27 V: Engine running and steering wheel being turned
• Approximately 27 to 34 V: Engine running and steering wheel not being turned

-

TRQ1 Zero Point Value

Zero point value of torque sensor 1

Min.: 0.0000 V

Max.: 4.9725 V

2.3 to 2.7 V

Engine running and steering wheel not being turned (without load)

TRQ2 Zero Point Value

Zero point value of torque sensor 2

Min.: 0.0000 V

Max.: 4.9725 V

2.3 to 2.7 V

Engine running and steering wheel not being turned (without load)

IG ON/OFF Times

Number of times of engine switch turned on/off since latest DTC detection

Min.: 0 times

Max.: 65535 times

-

-

Motor Overheat Record

Continuous overheat prevention control record

Unrec or Rec

Unrec

Unrec: Unrecorded

Rec: Recorded

The amount of power assist may be decreased to prevent the motor and ECUs from overheating if the steering wheel is continuously turned when the vehicle is either stopped or driven at a low speed, or if the steering wheel is kept in either full lock position for a long time.

Motor Lo Power Record

PIG power source voltage drop record

Unrec or Rec

Unrec

Unrec: Unrecorded

Rec: Recorded

If the PIG power source voltage decreases temporarily, the amount of power assist will be reduced.

Eng Rev Inter Record

Record of engine signal interruption

Unrec or Rec

Unrec

Unrec: Unrecorded

Rec: Recorded

Str Angle Inter Record

Record of steering sensor signal interruption occurrence display

Unrec or Rec

Unrec

Unrec: Unrecorded

Rec: Recorded

Spd Sig Invalid Record

Record of vehicle speed signal invalid

Unrec or Rec

Unrec

Unrec: Unrecorded

Rec: Recorded

Battery Voltage Lo Record

Battery voltage reduction history

Min.: 0 times

Max.: 65535 times

0 to 65535 times

-

Battery Control Count (Body ECU)

Number of battery load control operations

Min.: 0 times

Max.: 65535 times

-

-

PS Assist Signal

Status of the record of power steering assist signal

OFF or ON

OFF: Engine switch on (IG)

ON: Engine running

-

Motor Actual Current 2

Amount of current to motor

Min.: -327.68 A

Max.: 327.67 A

Value changes in proportion to steering effort

Engine running and steering wheel being turned

Rotation Angle Sens Avg(SIN)

Rotation angle sensor average (SIN)

Min.: 0.0000 V

Max.: 4.9725 V

-

-

Rotation Angle Sens Avg(COS)

Rotation angle sensor average (COS)

Min.: 0.0000 V

Max.: 4.9725 V

-

-

Motor Overheat Limit Cnt(Normal)

Number of times that assist limit was performed according to the estimated temperature of the motor coil and heat generating components of the power steering ECU assembly

Min.: 0 times

Max.: 255 times

-

-

Assist Limit Cnt(Power Voltage Low)

Number of times that assist limit was performed due to battery voltage having dropped to 9 V or below

Min.: 0 times

Max.: 255 times

-

-

Power Vol Low Prevention Limit Cnt

Number of times that assist limit was performed due to battery voltage having dropped to 9.7 V or below

Min.: 0 times

Max.: 255 times

-

-

Eng Stall/Ready OFF Cnt

Number of times that assist limit was performed after the engine stalled and the engine switch was turned off

Min.: 0 times

Max.: 255 times

-

-

Motor Overheat Limit Cnt(Motor Overload)

Number of times that assist limit was performed to prevent the system from overheating when the motor was overloaded due to the steering wheel being turned to the full lock position or a tire hitting a curb

Min.: 0 times

Max.: 255 times

-

-

Assist Limit Cnt(Vehicle Spd Sig Malf)

Number of times that assist limit was performed due to battery voltage having dropped to 9 V or below

Min.: 0 times

Max.: 255 times

-

-

Battery Voltage Keep Limit Cnt

Number of times that assist limit was performed due to battery voltage having dropped to 9.7 V or below

Min.: 0 times

Max.: 255 times

-

-

Assist Limit Record 1

Information of assist limit that was used in the past or is currently in use (latest history)

Unrec, Mtr Overheat, Pow Vol Low, Pow Vol Low Prevent, Eng Stall, Ready OFF, Mtr Overload, Vhcl Spd Sig Malf, Batt Vol Keep

-

-

Record 1 Key Cycle

Number of times that the engine switch was turned to ON before Assist Limit Record 1 was stored

Min.: 0 times

Max.: 65535 times

-

-

Record 1 Key Cycle Elapsed Time

Period of time that elapsed since the engine switch was turned to ON before Assist Limit Record 1 was stored

Min.: 0.0 s

Max.: 53687091.1 s

-

-

Record 1 Power Source

Power source operating status when Assist Limit Record 1 was stored

No Data, Running, Stop

-

-

Assist Limit Record 2

Information of assist limit that was used in the past (second latest history)

Unrec, Mtr Overheat, Pow Vol Low, Pow Vol Low Prevent, Eng Stall, Ready OFF, Mtr Overload, Vhcl Spd Sig Malf, Batt Vol Keep

-

-

Record 2 Key Cycle

Number of times that the engine switch was turned to ON after Assist Limit Record 2 was stored before Assist Limit Record 1 was stored

Min.: 0 times

Max.: 65535 times

-

-

Record 2 Key Cycle Elapsed Time

Period of time that elapsed since the engine switch was turned to ON before Assist Limit Record 2 was stored

Min.: 0.0 s

Max.: 53687091.1 s

-

-

Record 2 Power Source

Power source operating status when Assist Limit Record 2 was stored

No Data, Running, Stop

-

-

Assist Limit Record 3

Information of assist limit that was used in the past (third latest history)

Unrec, Mtr Overheat, Pow Vol Low, Pow Vol Low Prevent, Eng Stall, Ready OFF, Mtr Overload, Vhcl Spd Sig Malf, Batt Vol Keep

-

-

Record 3 Key Cycle

Number of times that the engine switch was turned to ON after Assist Limit Record 3 was stored before Assist Limit Record 2 was stored

Min.: 0 times

Max.: 65535 times

-

-

Record 3 Key Cycle Elapsed Time

Period of time that elapsed since the engine switch was turned to ON before Assist Limit Record 3 was stored

Min.: 0.0 s

Max.: 53687091.1 s

-

-

Record 3 Power Source

Power source operating status when Assist Limit Record 3 was stored

No Data, Running, Stop

-

-

Current Key Cycle

Number of times that engine switch was turned to ON

Min.: 0 times

Max.: 65535 times

-

-

Current Key Cycle Elapsed Time

Time elapsed since engine switch was turned to ON

Min.: 0.0 s

Max.: 53687091.1 s

-

-

Steering Angle

Steering angle

Min.: -3072.0 deg

Max.: 3070.5 deg

-

-

Torque Sensor 1 Output

Torque sensor 1 output value

Min.: 0.0000 V

Max.: 4.9725 V

-

-

Torque Sensor 2 Output

Torque sensor 2 output value

Min.: 0.0000 V

Max.: 4.9725 V

-

-

Torque Sensor 1 Power Supply

Torque sensor 1 power supply voltage

Min.: 0.0000 V

Max.: 4.9725 V

-

-

Torque Sensor 2 Power Supply

Torque sensor 2 power supply voltage

Min.: 0.0000 V

Max.: 4.9725 V

-

-

Rotation Angle Sensor Output 1

Rotation angle sensor Vx1 output voltage

Min.: 0.0000 V

Max.: 4.9725 V

-

-

Rotation Angle Sensor Output 2

Rotation angle sensor Vx2 output voltage

Min.: 0.0000 V

Max.: 4.9725 V

-

-

Rotation Angle Sensor Output 3

Rotation angle sensor Vy1 output voltage

Min.: 0.0000 V

Max.: 4.9725 V

-

-

Rotation Angle Sensor Output 4

Rotation angle sensor Vy2 output voltage

Min.: 0.0000 V

Max.: 4.9725 V

-

-

Motor 1 Terminal Current (U)

Motor 1 terminal current (U phase)

Min.: -327.68 A

Max.: 327.67 A

Value changes in proportion to steering effort

Engine running and steering wheel being turned

Motor 1 Terminal Current (V)

Motor 1 terminal current (V phase)

Min.: -327.68 A

Max.: 327.67 A

Value changes in proportion to steering effort

Engine running and steering wheel being turned

Motor 1 Terminal Current (W)

Motor 1 terminal current (W phase)

Min.: -327.68 A

Max.: 327.67 A

Value changes in proportion to steering effort

Engine running and steering wheel being turned

Motor 2 Terminal Current (U)

Motor 2 terminal current (U phase)

Min.: -327.68 A

Max.: 327.67 A

Value changes in proportion to steering effort

Engine running and steering wheel being turned

Motor 2 Terminal Current (V)

Motor 2 terminal current (V phase)

Min.: -327.68 A

Max.: 327.67 A

Value changes in proportion to steering effort

Engine running and steering wheel being turned

Motor 2 Terminal Current (W)

Motor 2 terminal current (W phase)

Min.: -327.68 A

Max.: 327.67 A

Value changes in proportion to steering effort

Engine running and steering wheel being turned

Motor 1 U Phase Duty

Motor 1 U phase duty

Min.: 0.00%

Max.: 100.00%

-

-

Motor 1 V Phase Duty

Motor 1 V phase duty

Min.: 0.00%

Max.: 100.00%

-

-

Motor 1 W Phase Duty

Motor 1 W phase duty

Min.: 0.00%

Max.: 100.00%

-

-

Motor 2 U Phase Duty

Motor 2 U phase duty

Min.: 0.00%

Max.: 100.00%

-

-

Motor 2 V Phase Duty

Motor 2 V phase duty

Min.: 0.00%

Max.: 100.00%

-

-

Motor 2 W Phase Duty

Motor 2 W phase duty

Min.: 0.00%

Max.: 100.00%

-

-

Motor 1 Terminal Volt (U)

Motor 1 terminal voltage (U phase)

Min.: 0.000 V

Max.: 98.000 V

Value changes within 4 to 35 V range

Engine running and steering wheel being turned

Motor 1 Terminal Volt (V)

Motor 1 terminal voltage (V phase)

Min.: 0.000 V

Max.: 98.000 V

Value changes within 4 to 35 V range

Engine running and steering wheel being turned

Motor 1 Terminal Volt (W)

Motor 1 terminal voltage (W phase)

Min.: 0.000 V

Max.: 98.000 V

Value changes within 4 to 35 V range

Engine running and steering wheel being turned

Motor 2 Terminal Volt (U)

Motor 2 terminal voltage (U phase)

Min.: 0.000 V

Max.: 98.000 V

Value changes within 4 to 35 V range

Engine running and steering wheel being turned

Motor 2 Terminal Volt (V)

Motor 2 terminal voltage (V phase)

Min.: 0.000 V

Max.: 98.000 V

Value changes within 4 to 35 V range

Engine running and steering wheel being turned

Motor 2 Terminal Volt (W)

Motor 2 terminal voltage (W phase)

Min.: 0.000 V

Max.: 98.000 V

Value changes within 4 to 35 V range

Engine running and steering wheel being turned

Motor 1 PIG Power Supply

Power supply voltage to active motor 1

Min.: 0.0000 V

Max.: 20.1531 V

9 to 16 V

Engine running and steering wheel being turned

Motor 2 PIG Power Supply

Power supply voltage to active motor 2

Min.: 0.0000 V

Max.: 20.1531 V

9 to 16 V

Engine running and steering wheel being turned

The Number of DTCs

Number of detected DTCs when freeze frame data was stored

Min.: 0

Max.: 255

0 to 255

-

*a

EPS Warning Light

C1511

Torque Sensor1

Torque sensor malfunction

EPS warning light: Comes on

Engine switch on (IG) again

-

C1512

Torque Sensor2

Torque sensor malfunction

EPS warning light: Comes on

Engine switch on (IG) again

-

C1513

Torque Sensor Deviation Excessive

Torque sensor malfunction

EPS warning light: Comes on

Engine switch on (IG) again

-

C1514

Torque Sensor Power Supply Voltage

Torque sensor malfunction

EPS warning light: Comes on

Engine switch on (IG) again

-

C1515

Torque Sensor Zero Point Adjustment Undone

This DTC is stored when torque sensor zero point calibration has not been performed.

EPS warning light: Comes on

Zero point calibration is performed or the engine switch on (IG) again

There is no malfunction if this DTC is not output again after performing zero point calibration.

C1516

Torque Sensor Zero Point Adjustment Incomplete

Torque sensor zero point calibration is incomplete due to the steering wheel being touched during calibration.

EPS warning light: Comes on

The DTC is cleared

There is no malfunction if this DTC is not output again after clearing the DTC and torque sensor calibration value, and performing zero point calibration.

C1517

Torque Hold

Torque sensor malfunction

EPS warning light: Comes on

Engine switch on (IG) again

-

C1521

Short in Motor Circuit

Motor overcurrent

EPS warning light: Comes on

Engine switch on (IG) again

-

C1522

Power Supply Sensor

Motor current sensor malfunction

EPS warning light: Comes on

Engine switch on (IG) again

-

C1523

Current Deviation Excessive

Excessively large current deviation

EPS warning light: Comes on

Engine switch on (IG) again

-

C1528

Motor Rotation Angle Sensor

Motor rotation angle sensor malfunction

EPS warning light: Comes on

Engine switch on (IG) again

-

C1531

ECU Malfunction

ECU internal malfunction (CPU malfunction)

EPS warning light: Comes on

Engine switch on (IG) again

-

C1532

ECU Malfunction

ECU internal malfunction (Peripheral circuit malfunction)

EPS warning light: Comes on

Engine switch on (IG) again

-

C1533

Temperature Sensor Circuit is Low or High

ECU internal malfunction (Substrate temperature sensor malfunction)

EPS warning light: Comes on

The ECU judges the system has returned to normal

-

C1534

EEPROM

ECU internal malfunction (EEPROM error)

EPS warning light: Comes on

Engine switch on (IG) again

-

C1541

Vehicle Speed Signal

A vehicle speed signal malfunction is detected

EPS warning light: Comes on

The ECU judges the system has returned to normal

-

C1551

IG Power Supply Voltage

When the PIG power supply voltage is normal, the IG power supply voltage is 18.5 V or higher

EPS warning light: Comes on

The ECU judges the system has returned to normal

-

C1552

PIG Power Supply Voltage

PIG power source circuit malfunction

EPS warning light: Comes on

Engine switch on (IG) again

-

C1554

Power Supply Relay Failure

Power source relay circuit malfunction

EPS warning light: Comes on

Engine switch on (IG) again

-

C1555

Motor Relay Welding Failure

Motor relay circuit malfunction

EPS warning light: Comes on

Engine switch on (IG) again

-

C1567

Error in Matching of ECUs

• An incompatible ECM is detected
• An incompatible main body ECU (multiplex network body ECU) is detected
• An incompatible skid control ECU (brake actuator assembly) is detected

EPS warning light: Comes on

Engine switch on (IG) again

-

C1581

Assist Map Number Un-Writing

Assist map not written in power steering ECU (rack and pinion power steering gear assembly)

EPS warning light: Comes on

Assist Map Writing is performed

-

C1582

Assist Map Number Mismatch

Assist map number mismatch

EPS warning light: Does not come on

Engine switch on (IG) again

-

U0100

Lost Communication with ECM / PCM "A"

Lost communication with ECM

EPS warning light: When an error occurs during steering assist, the warning light does not illuminate. For errors that occur before assist (at the time of the decision to start assist), the warning light illuminates.

The ECU judges the system has returned to normal

-

U0126

Lost Communication With Steering Angle Sensor Module

Lost communication with steering angle sensor

EPS warning light: Comes on

The ECU judges the system has returned to normal

-

U0129

Lost Communication with Brake System Control Module

Lost communication with skid control ECU (Brake actuator assembly)

EPS warning light: Comes on

The ECU judges the system has returned to normal

-

U0132

Lost Communication with Ride Level Control Module

Lost communication with AVS ECU (absorber control ECU)

EPS warning light: Does not come on

The ECU judges the system has returned to normal

w/ Adaptive Variable Suspension System

U023A

Lost Communication with Front Camera Module

Lost communication with forward recognition camera

EPS warning light: Does not come on

The ECU judges the system has returned to normal

-

1.

CHECK THE PROBLEM SYMPTOMS

SPORT mode or NORMAL mode is abnormal.

A

ECO mode is abnormal.

B

GO TO AIR CONDITIONING SYSTEM

2.

CHECK CAN COMMUNICATION SYSTEM

CAN communication system DTCs are not output.

A

CAN communication system DTCs are output.

B

GO TO CAN COMMUNICATION SYSTEM

3.

CHECK HARNESS AND CONNECTOR (DRIVE MODE SELECT SWITCH (ELECTRIC PARKING BRAKE SWITCH ASSEMBLY) - BODY GROUND)

(b) Disconnect the G24 drive mode select switch (electric parking brake switch assembly) connector.

G24-16 (GND1) - Body ground

Always

Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.

INSPECT DRIVE MODE SELECT SWITCH (ELECTRIC PARKING BRAKE SWITCH ASSEMBLY)

CAN communication system DTCs are not output.

A

CAN communication system DTCs are output.

B

REPLACE DRIVE MODE SELECT SWITCH (ELECTRIC PARKING BRAKE SWITCH ASSEMBLY)

5.

CHECK HARNESS AND CONNECTOR (DRIVE MODE SELECT SWITCH (ELECTRIC PARKING BRAKE SWITCH ASSEMBLY) - ECM)

(b) Disconnect the A18 ECM connectors.

A18-55 (PWMS) - Body ground

SPORT S/S+ mode switch being turned and held

Below 1 Ω

A18-55 (PWMS) - Body ground

SPORT S/S+ mode switch not turned

10 kΩ or higher

A18-40 (SPCN) - Body ground

NORMAL/CUSTOM mode switch being pushed and held

Below 1 Ω

A18-40 (SPCN) - Body ground

NORMAL/CUSTOM mode switch not pushed

10 kΩ or higher

A18-55 (PWMS) - Body ground

SPORT mode switch being turned and held

Below 1 Ω

A18-55 (PWMS) - Body ground

SPORT mode switch not turned

10 kΩ or higher

A18-40 (SPCN) - Body ground

NORMAL mode switch being pushed and held

Below 1 Ω

A18-40 (SPCN) - Body ground

NORMAL mode switch not pushed

10 kΩ or higher

REPLACE ECM

REPAIR OR REPLACE HARNESS OR CONNECTOR

*a

DLC3

*a

Normal System Code

*b

Codes 21 and 22

*c

ON

*d

OFF

*e

Seconds

*f

Code 21

*g

Code 22

11

C1511

C1512

C1513

C1514

C1517

12

C1528

13

C1541

15

C1515

16

C1516

22

C1552

23

C1554

24

C1521

C1522

C1523

25

C1531

C1532

C1533

C1534

C1551

C1555

26

C1581

C1582

41

U0100

42

U0129

43

U0132

44

C1567

45

U023A

47

U0126

1.

INSPECT COMBINATION METER ASSEMBLY

EPS Warning

REPLACE RACK AND PINION POWER STEERING GEAR ASSEMBLY

GO TO METER / GAUGE SYSTEM

• Torque sensor (rack and pinion power steering gear assembly) malfunction
• Power steering motor (rack and pinion power steering gear assembly) malfunction
• Power steering ECU (rack and pinion power steering gear assembly) malfunction

Power steering assist stops or assist amount is limited

Red or yellow

Sounds intermittently or once

• Vehicle speed signal malfunction
• Skid control ECU (brake actuator assembly) malfunction
• History of power steering ECU (rack and pinion power steering gear assembly) overheating
• History of decrease in battery voltage (not malfunction)

Power steering assist is temporarily limited

Yellow

Sounds once

Meter Vehicle Velocity

Vehicle speed from speedometer

Min.: 0.0 km/h (0.0 MPH)

Max.: 300.0 km/h (186.4 MPH)

• 0 km/h (0 MPH): Engine running and vehicle stopped
• No significant fluctuation: Engine running and vehicle driven at a constant speed

-

Wheel Speed Right

Rear right wheel speed

Min.: 0 km/h (0 MPH)

Max.: 255 km/h (158 MPH)

• 0 km/h (0 MPH): Engine running and vehicle stopped
• No significant fluctuation: Engine running and vehicle driven at a constant speed

-

Wheel Speed Left

Rear left wheel speed

Min.: 0 km/h (0 MPH)

Max.: 255 km/h (158 MPH)

• 0 km/h (0 MPH): Engine running and vehicle stopped
• No significant fluctuation: Engine running and vehicle driven at a constant speed

-

Engine Revolution

Engine speed

Min.: 0 rpm

Max.: 12800 rpm

No significant fluctuation

Engine running at a constant speed

Motor Actual Current

Amount of current to motor

Min.: -327.68 A

Max.: 327.67 A

Value changes in proportion to steering effort

- The value increases when turning right and decreases when turning left

Engine running and steering wheel being turned

Command Value Current

Requested current to motor

Min.: -327.68 A

Max.: 327.67 A

Value changes in proportion to steering effort

- The value increases when turning right and decreases when turning left

Engine running and steering wheel being turned

Steering Angle Velocity

Steering angle speed

Min.: -32768 deg/s

Max.: 32767 deg/s

Value changes in proportion to steering speed

- The value increases when turning left and decreases when turning right

Engine running and steering wheel being turned

Thermistor Temperature

ECU substrate temperature

Min.: -50.0°C (-58.0°F)

Max.: 150.0°C (302.0°F)

-50°C to 150°C (-58°F to 302°F)

-

IG Power Supply

IG power source voltage

Min.: 0.0000 V

Max.: 20.1531 V

8 to 16 V

Engine switch on (IG)

Steering Wheel Torque

Steering wheel torque

Min.: -327.68 Nm

Max.: 7.00 Nm

Value changes in proportion to steering effort

- The value increases when turning left and decreases when turning right

Engine running and steering wheel being turned

Motor Rotation Angle

Motor rotation angle

Min.: 0.000 deg

Max.: 1441.770 deg

During steering operation, motor rotation angle value changes from 0 to 360°

Engine running and steering wheel being turned

Command Val Current 2

Requested current to motor

Min.: -327.68 A

Max.: 327.67 A

Value changes in proportion to steering effort

Engine running and steering wheel being turned

Motor Voltage

Motor power supply voltage

Min.: 0.000 V

Max.: 98.000 V

• Approximately 27 V: Engine running and steering wheel being turned
• Approximately 27 to 34 V: Engine running and steering wheel not being turned

-

TRQ1 Zero Point Value

Zero point value of torque sensor 1

Min.: 0.0000 V

Max.: 4.9725 V

2.3 to 2.7 V

Engine running and steering wheel not being turned (without load)

TRQ2 Zero Point Value

Zero point value of torque sensor 2

Min.: 0.0000 V

Max.: 4.9725 V

2.3 to 2.7 V

Engine running and steering wheel not being turned (without load)

PS Assist Signal

Status of the record of power steering assist signal

OFF or ON

OFF: Engine switch on (IG)

ON: Engine running

-

Motor Actual Current 2

Amount of current to motor

Min.: -327.68 A

Max.: 327.67 A

Value changes in proportion to steering effort

Engine running and steering wheel being turned

Rotation Angle Sens Avg(SIN)

Rotation angle sensor average (SIN)

Min.: 0.0000 V

Max.: 4.9725 V

-

-

Rotation Angle Sens Avg(COS)

Rotation angle sensor average (COS)

Min.: 0.0000 V

Max.: 4.9725 V

-

-

Steering Angle

Steering angle

Min.: -3072.0 deg

Max.: 3070.5 deg

-

-

Torque Sensor 1 Output

Torque sensor 1 output value

Min.: 0.0000 V

Max.: 4.9725 V

-

-

Torque Sensor 2 Output

Torque sensor 2 output value

Min.: 0.0000 V

Max.: 4.9725 V

-

-

Torque Sensor 1 Power Supply

Torque sensor 1 power supply voltage

Min.: 0.0000 V

Max.: 4.9725 V

-

-

Torque Sensor 2 Power Supply

Torque sensor 2 power supply voltage

Min.: 0.0000 V

Max.: 4.9725 V

-

-

Rotation Angle Sensor Output 1

Rotation angle sensor Vx1 output voltage

Min.: 0.0000 V

Max.: 4.9725 V

-

-

Rotation Angle Sensor Output 2

Rotation angle sensor Vx2 output voltage

Min.: 0.0000 V

Max.: 4.9725 V

-

-

Rotation Angle Sensor Output 3

Rotation angle sensor Vy1 output voltage

Min.: 0.0000 V

Max.: 4.9725 V

-

-

Rotation Angle Sensor Output 4

Rotation angle sensor Vy2 output voltage

Min.: 0.0000 V

Max.: 4.9725 V

-

-

Motor 1 Terminal Current (U)

Motor 1 terminal current (U phase)

Min.: -327.68 A

Max.: 327.67 A

Value changes in proportion to steering effort

Engine running and steering wheel being turned

Motor 1 Terminal Current (V)

Motor 1 terminal current (V phase)

Min.: -327.68 A

Max.: 327.67 A

Value changes in proportion to steering effort

Engine running and steering wheel being turned

Motor 1 Terminal Current (W)

Motor 1 terminal current (W phase)

Min.: -327.68 A

Max.: 327.67 A

Value changes in proportion to steering effort

Engine running and steering wheel being turned

Motor 2 Terminal Current (U)

Motor 2 terminal current (U phase)

Min.: -327.68 A

Max.: 327.67 A

Value changes in proportion to steering effort

Engine running and steering wheel being turned

Motor 2 Terminal Current (V)

Motor 2 terminal current (V phase)

Min.: -327.68 A

Max.: 327.67 A

Value changes in proportion to steering effort

Engine running and steering wheel being turned

Motor 2 Terminal Current (W)

Motor 2 terminal current (W phase)

Min.: -327.68 A

Max.: 327.67 A

Value changes in proportion to steering effort

Engine running and steering wheel being turned

Motor 1 U Phase Duty

Motor 1 U phase duty

Min.: 0.00%

Max.: 100.00%

-

-

Motor 1 V Phase Duty

Motor 1 V phase duty

Min.: 0.00%

Max.: 100.00%

-

-

Motor 1 W Phase Duty

Motor 1 W phase duty

Min.: 0.00%

Max.: 100.00%

-

-

Motor 2 U Phase Duty

Motor 2 U phase duty

Min.: 0.00%

Max.: 100.00%

-

-

Motor 2 V Phase Duty

Motor 2 V phase duty

Min.: 0.00%

Max.: 100.00%

-

-

Motor 2 W Phase Duty

Motor 2 W phase duty

Min.: 0.00%

Max.: 100.00%

-

-

Motor 1 Terminal Volt (U)

Motor 1 terminal voltage (U phase)

Min.: 0.000 V

Max.: 98.000 V

Value changes within 4 to 35 V range

Engine running and steering wheel being turned

Motor 1 Terminal Volt (V)

Motor 1 terminal voltage (V phase)

Min.: 0.000 V

Max.: 98.000 V

Value changes within 4 to 35 V range

Engine running and steering wheel being turned

Motor 1 Terminal Volt (W)

Motor 1 terminal voltage (W phase)

Min.: 0.000 V

Max.: 98.000 V

Value changes within 4 to 35 V range

Engine running and steering wheel being turned

Motor 2 Terminal Volt (U)

Motor 2 terminal voltage (U phase)

Min.: 0.000 V

Max.: 98.000 V

Value changes within 4 to 35 V range

Engine running and steering wheel being turned

Motor 2 Terminal Volt (V)

Motor 2 terminal voltage (V phase)

Min.: 0.000 V

Max.: 98.000 V

Value changes within 4 to 35 V range

Engine running and steering wheel being turned

Motor 2 Terminal Volt (W)

Motor 2 terminal voltage (W phase)

Min.: 0.000 V

Max.: 98.000 V

Value changes within 4 to 35 V range

Engine running and steering wheel being turned

Motor 1 PIG Power Supply

Power supply voltage to active motor 1

Min.: 0.0000 V

Max.: 20.1531 V

9 to 16 V

Engine running and steering wheel being turned

Motor 2 PIG Power Supply

Power supply voltage to active motor 2

Min.: 0.0000 V

Max.: 20.1531 V

9 to 16 V

Engine running and steering wheel being turned

1.

VEHICLE BROUGHT TO WORKSHOP

2.

INSPECT BATTERY

3.

CHECK DTC AND FREEZE FRAME DATA*

4.

PROBLEM SYMPTOM CONFIRMATION

Symptom does not occur.

A

Symptom occurs.

B

GO TO STEP 6

5.

SYMPTOM SIMULATION

6.

CHECK CAN COMMUNICATION SYSTEM*

CAN communication system DTCs are not output.

A

CAN communication system DTCs are output.

B

PROCEED TO CAN COMMUNICATION SYSTEM

7.

CHECK FOR DTC*

DTCs are not output.

A

DTCs are output.

B

GO TO STEP 10

8.

PROBLEM SYMPTOMS TABLE

Fault is not listed in Problem Symptoms Table.

A

Fault is listed in Problem Symptoms Table.

B

GO TO STEP 10

9.

OVERALL ANALYSIS AND TROUBLESHOOTING*

10.

REPAIR OR REPLACE

11.

CONFIRMATION TEST

END

*A

w/ Adaptive Variable Suspension System

-

-

*1

DRIVE MODE SELECT SWITCH (ELECTRIC PARKING BRAKE SWITCH ASSEMBLY)

*2

FORWARD RECOGNITION CAMERA

*3

BRAKE ACTUATOR ASSEMBLY

- SKID CONTROL ECU

*4

ECM

*5

RACK AND PINION POWER STEERING GEAR ASSEMBLY

- POWER STEERING ECU

-POWER STEERING MOTOR

-TORQUE SENSOR

*6

NO. 1 ENGINE ROOM RELAY BLOCK AND NO. 1 JUNCTION BLOCK

- EPS FUSE

*7

AVS ECU (ABSORBER CONTROL ECU)

*8

COMBINATION METER ASSEMBLY

*9

MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

*10

INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

- IG1-NO. 1 RELAY

- EPS-IG1 FUSE

*11

DLC3

*12

AIR CONDITIONING AMPLIFIER ASSEMBLY

*13

STEERING SENSOR

-

-

Lane Departure Alert System (w/ Steering Control)

Pre-collision System

Intelligent Clearance Sonar System

Lighting System (for Gasoline Model with Cornering Light)

Parking Assist Monitor System

Panoramic View Monitor System

Heavy steering

Check assist limit record

Front tires (improperly inflated, unevenly worn)

Front wheel alignment (incorrect)

Front suspension (Lower ball joint)

Rack and pinion power steering gear assembly

Steering effort differs between right and left or is uneven

Rotation angle sensor initialization and torque sensor zero point calibration incomplete

Front tires (improperly inflated, unevenly worn)

Front wheel alignment (incorrect)

Front suspension (Lower ball joint)

Rack and pinion power steering gear assembly

Steering column assembly (for Manual Tilt and Manual Telescopic Steering Column)

Steering column assembly (for Power Tilt and Power Telescopic Steering Column)

While driving, steering effort does not change in accordance with vehicle speed, or steering wheel does not return to its centered position easily

Skid control ECU (Brake actuator assembly)

Speed sensor

Rack and pinion power steering gear assembly

CAN communication system

Friction sounds occur when turning steering wheel during low speed driving

Rack and pinion power steering gear assembly

Steering column assembly (for Manual Tilt and Manual Telescopic Steering Column)

Steering column assembly (for Power Tilt and Power Telescopic Steering Column)

Spiral with cable sensor sub-assembly

Steering column cover contacting steering wheel assembly (for Manual Tilt and Manual Telescopic Steering Column)

Steering column cover contacting steering wheel assembly (for Power Tilt and Power Telescopic Steering Column)

High-pitched sound (squeaking) occurs when turning steering wheel slowly with vehicle stopped

Rack and pinion power steering gear assembly

Steering wheel installation (incorrect)

Steering wheel vibrates and noise occurs when turning steering wheel from lock to lock

Rack and pinion power steering gear assembly

Steering column assembly (for Manual Tilt and Manual Telescopic Steering Column)

Steering column assembly (for Power Tilt and Power Telescopic Steering Column)

Steering wheel installation (incorrect)

Drive mode does not change

Drive more select switch circuit

EPS warning light remains on

EPS warning light circuit

Rack and Pinion Power Steering Gear Assembly

HINT:

The components listed on the right are built-in

Power Steering ECU

• Calculates the motor operation current based on the steering torque and vehicle speed signals, and outputs it to the motor.
• When a malfunction is detected in the power steering system, it outputs a warning signal to the combination meter assembly.

Power Steering Motor

• Generates power assist in accordance with the actuation current received from the power steering ECU.
• The built-in motor rotation angle sensor detects the rotation angle of the motor.

Torque Sensor

Detects the steering torque.

Reduction Mechanism

Decelerates the motor rotation torque and transmits it to the rack shaft.

Steering Sensor

Detects the steering angle and steering direction.

Skid Control ECU (Brake Actuator Assembly)

Sends the vehicle speed signal and steering coordinated control amount signal to the rack and pinion power steering gear assembly.

ECM

• Outputs the engine speed.
• Outputs the drive mode select signal.

Air Conditioning Amplifier Assembly

Receives a signal from the power steering ECU (rack and pinion power steering gear assembly) to limit electrical usage.

AVS ECU (Absorber Control ECU)*

Transmits the drive mode select signal to the power steering ECU assembly.

Combination Meter Assembly

EPS Warning Light

Illuminates to alert the driver when the power steering ECU (rack and pinion power steering gear assembly) detects a malfunction in the power steering system.

Multi-information Display

Displays a warning message to inform the driver of a malfunction in the system.

Master Warning Light

Illuminates when a warning message is displayed on the multi-information display.

Multi Buzzer

Sounds to warn the driver of a malfunction in the system.

Forward Recognition Camera

Requests steering assist torque when the lane departure alert system judges that the vehicle is departing from its lane.

Drive Mode Select Switch (Electric Parking Brake Switch Assembly)

Switches the driving mode.

*a

Component without harness connected

(Rack and Pinion Power Steering Gear Assembly)

-

-

C67-4 (IG)

IG power source

C67-7 (PGND)

power ground

C67-8 (PIG)

power source

C67-10 (CANH)

CAN communication line

C67-11 (CANL)

CAN communication line

*a

Front view of wire harness connector

(to Rack and Pinion Power Steering Gear Assembly)

-

-

C67-4 (IG) - Body ground

W - Body ground

IG power source

Engine switch on (IG)

8 to 16 V

C67-7 (PGND) - Body ground

B - Body ground

power ground

Always

Below 1 Ω

C67-8 (PIG) - Body ground

W - Body ground

power source

Always

9 to 16 V

U0100

Lost Communication with ECM / PCM "A"

Lost communication with ECM

• CAN communication system
• ECM
• Rack and pinion power steering gear assembly

EPS warning light: When an error occurs during steering assist, the warning light does not illuminate. For errors that occur before assist (at the time of the decision to start assist), the warning light illuminates.

The ECU judges the system has returned to normal

-

U0126

Lost Communication With Steering Angle Sensor Module

Lost communication with steering angle sensor

• CAN communication system
• Steering sensor
• Rack and pinion power steering gear assembly

EPS warning light: Comes on

The ECU judges the system has returned to normal

-

U0129

Lost Communication with Brake System Control Module

Lost communication with skid control ECU (Brake actuator assembly)

• CAN communication system
• Skid control ECU (Brake actuator assembly)
• Rack and pinion power steering gear assembly

EPS warning light: Comes on

The ECU judges the system has returned to normal

-

U0132

Lost Communication with Ride Level Control Module

Lost communication with AVS ECU (absorber control ECU)

• CAN communication system
• AVS ECU (Absorber control ECU)

EPS warning light: Does not come on

The ECU judges the system has returned to normal

w/ Adaptive Variable Suspension System

U023A

Lost Communication with Front Camera Module

Lost communication with forward recognition camera

• CAN communication system
• Forward recognition camera
• Rack and pinion power steering gear assembly

EPS warning light: Does not come on

The ECU judges the system has returned to normal

-

1.

GO TO CAN COMMUNICATION SYSTEM

END