Toyota Avalon (XX50): Power Tilt And Power Telescopic Steering Column System(for Hv Model)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Steering / Steering Column / Power Tilt And Power Telescopic Steering Column System(for Hv Model)

ECU Power Source Circuit System Voltage Low (B2620A2)

DESCRIPTION

The ECU power source circuit supplies positive (+) voltage to the multiplex tilt and telescopic ECU.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B2620A2	ECU Power Source Circuit System Voltage Low	The voltage of the ECU power source drops to 8 V or less for 10 seconds or more.	ECU-DCC NO. 2 fuse Harness or connector Multiplex tilt and telescopic ECU

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - AUXILIARY BATTERY)

(a) Disconnect the G49 multiplex tilt and telescopic ECU connector.

*a	Front view of wire harness connector (to Multiplex Tilt and Telescopic ECU)

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
G49-9 (ECUB) - Body ground	Power switch off	11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.	CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - BODY GROUND)

(a) Disconnect the G49 multiplex tilt and telescopic ECU connector.

*a	Front view of wire harness connector (to Multiplex Tilt and Telescopic ECU)

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
G49-8 (GND2) - Body ground	Always	Below 1 Ω

REPLACE MULTIPLEX TILT AND TELESCOPIC ECU

REPAIR OR REPLACE HARNESS OR CONNECTOR

Tilt Position Sensor or Tilt Motor Circuit Component Internal Failure (B261096)

DESCRIPTION

The tilt motor (steering column assembly) is operated by the power source voltage supplied from the multiplex tilt and telescopic ECU and tilts the steering column up and down. The tilt position sensor (Hall IC) in the tilt motor (steering column assembly) detects the tilt angle of the steering column assembly and sends a signal to the multiplex tilt and telescopic ECU based on that angle.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B261096	Tilt Position Sensor or Tilt Motor Circuit Component Internal Failure	Tilt operation stops within the operation range while operating.	TI&TE Fuse Tilt position sensor (steering column assembly) Tilt motor (steering column assembly) Harness or connector Multiplex tilt and telescopic ECU

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1.	PERFORM ACTIVE TEST USING TECHSTREAM (TILT MOTOR)

(a) Turn the power switch off.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Check that the steering wheel tilts up and down.

(f) Enter the following menus: Body Electrical / Tilt & Telescopic / Active Test.

Body Electrical > Tilt&Telescopic > Active Test

Tester Display
Tilt Motor

Body Electrical > Tilt&Telescopic > Active Test

Tester Display	Measurement Item	Control Range
Tilt Motor	Tilt operation	UP/DOWN

OK:

The steering wheel tilts up and down.

GO TO STEP 6

2.	CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - TILT POSITION SENSOR (STEERING COLUMN ASSEMBLY))

(a) Disconnect the G49 multiplex tilt and telescopic ECU connector.

(b) Disconnect the G61 tilt motor (steering column assembly) connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
G49-13 (VCI) - G61-4 (VCI)	Always	Below 1 Ω
G49-16 (TIS) - G61-5 (TIS)	Always	Below 1 Ω
G49-4 (E1) -G61-6 (E1)	Always	Below 1 Ω
G49-13 (VCI) or G61-4 (VCI) - Body ground	Always	10 kΩ or higher
G49-16 (TIS) or G61-5 (TIS) - Body ground	Always	10 kΩ or higher
G49-4 (E1) or G61-6 (E1) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - BODY GROUND)

(a) Disconnect the G49 multiplex tilt and telescopic ECU connector.

*a	Front view of wire harness connector (to Multiplex Tilt and Telescopic ECU)

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
G49-1 (GND) - Body ground	Always	Below 1 Ω
G49-8 (GND2) - Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	CHECK MULTIPLEX TILT AND TELESCOPIC ECU (VCI, TIS TERMINAL VOLTAGE)

(a) Reconnect the G49 multiplex tilt and telescopic ECU connector.

*a	Component with harness connected (Multiplex Tilt and Telescopic ECU)

(b) Disconnect the G61 tilt motor (steering column assembly) connector.

Standard Voltage:

Tester Connection	Condition	Specified Condition
G49-13 (VCI) - G49-4 (E1)	Power switch on (IG)	8 to 14 V
G49-16 (TIS) - G49-4 (E1)	Power switch on (IG)	8 to 14 V

REPLACE MULTIPLEX TILT AND TELESCOPIC ECU

5.	CHECK TILT POSITION SENSOR (STEERING COLUMN ASSEMBLY)

(a) Reconnect the G49 multiplex tilt and telescopic ECU connector.

*a	Component with harness connected (Tilt Motor (Steering Column Assembly))

(b) Reconnect the G61 tilt motor (steering column assembly) connector.

Standard Voltage:

Tester Connection	Condition	Specified Condition
G61-5 (TIS) - G61-6 (E1)	Steering wheel tilting up or tilting down	Pulse generation High: 8 to 14 V Low: Below 1 V

Tester Connection

Condition

Specified Condition

G61-5 (TIS) - G61-6 (E1)

Steering wheel tilting up or tilting down

Pulse generation

High: 8 to 14 V

Low: Below 1 V

REPLACE MULTIPLEX TILT AND TELESCOPIC ECU

REPLACE STEERING COLUMN ASSEMBLY

6.	CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - AUXILIARY BATTERY)

(a) Disconnect the G49 multiplex tilt and telescopic ECU connector.

*a	Front view of wire harness connector (to Multiplex Tilt and Telescopic ECU)

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
G49-2 (+B) - Body ground	Always	11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.	CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - BODY GROUND)

(a) Disconnect the G49 multiplex tilt and telescopic ECU connector.

*a	Front view of wire harness connector (to Multiplex Tilt and Telescopic ECU)

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
G49-1 (GND) - Body ground	Always	Below 1 Ω
G49-8 (GND2) - Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.	CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - TILT MOTOR (STEERING COLUMN ASSEMBLY))

(a) Disconnect the G49 multiplex tilt and telescopic ECU connector.

(b) Disconnect the G61 tilt motor (steering column assembly) connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
G49-7 (TIM+) - G61-1 (TIM+)	Always	Below 1 Ω
G49-20 (TIM-) - G61-2 (TIM-)	Always	Below 1 Ω
G49-7 (TIM+) or G61-1 (TIM+) - Body ground	Always	10 kΩ or higher
G49-20 (TIM-) or G61-2 (TIM-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

9.	CHECK TILT MOTOR (STEERING COLUMN ASSEMBLY)

(a) Disconnect the G61 tilt motor (steering column assembly) connector.

*a	Component without harness connected (Tilt Motor (Steering Column Assembly))

(b) Apply 12 V auxiliary battery voltage to the tilt motor (steering column assembly) connector. Then check the steering wheel tilt operation.

OK:

Measurement Condition	Specified Condition
12 V auxiliary battery positive (+) lead → G61-1 (TIM+) 12 V auxiliary battery negative (-) lead → G61-2 (TIM-)	The steering wheel tilts up.
12 V auxiliary battery positive (+) lead → G61-2 (TIM-) 12 V auxiliary battery negative (-) lead → G61-1 (TIM+)	The steering wheel tilts down.

REPLACE MULTIPLEX TILT AND TELESCOPIC ECU

REPLACE STEERING COLUMN ASSEMBLY

Customize Parameters

CUSTOMIZE PARAMETERS

CUSTOMIZE POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM

HINT:

The following items can be customized.

NOTICE:

When the customer requests a change in a function, first make sure that the function can be customized.
Record the current settings before customizing.

(a) Customizing with the Techstream

(1) Connect the Techstream to the DLC3.

(2) Turn the power switch on (IG).

(3) Turn the Techstream on.

(4) Enter the following menus: Body Electrical / Tilt & Telescopic / Utility / Customize.

(5) Select the setting by referring to the table below.

Tilt & Telesco

Tester Display	Description	Default	Setting	ECU
Autoaway/Return Operation Setting	Turn the auto away/return function	Tilt ON	$0000:Tilt&Telescopic OFF,$0001:Telescopic ON,$0010:Tilt ON,$0011:Tilt&Telescopic ON	Multiplex tilt and telescopic ECU

(b) Customizing with the multi-display

(1) Turn the power switch on (IG).

(2) Select the setting by referring to the table below

(3) Select the following menus: Setup / Vehicle / Vehicle Customization / Other Vehicle Settings.

(4) Select the setting by referring to the table below.

Other Vehicle Settings

Display	Description	Default	Setting	ECU
Steering Column Easy-Exit	Turn the auto away/return function	Tilt Only	Tilt & Telescopic / Tilt Only / Telescopic Only / Off	Multiplex tilt and telescopic ECU

Data List / Active Test

DATA LIST / ACTIVE TEST

READ DATA LIST

HINT:

Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

NOTICE:

In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

(a) Turn the power switch off.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / Tilt & Telescopic / Data List.

(f) According to the display on the Techstream, read the Data List.

Body Electrical > Tilt&Telescopic > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Total Distance Traveled	Driving distance	Min.: 0 Max.: 999999	-	-
Total Distance Traveled - Unit	Driving distance unit	km or mile	-	-
Tilt Up Limit	Uppermost tilt position	Not Memory or Memory	Not Memory: Position not memorized Memory: Position memorized	-
Tilt Down Limit	Lowermost tilt position	Not Memory or Memory	Not Memory: Position not memorized Memory: Position memorized	-
Telescopic Short Limit	Shortest telescopic position	Not Memory or Memory	Not Memory: Position not memorized Memory: Position memorized	-
Telescopic Long Limit	Longest telescopic position	Not Memory or Memory	Not Memory: Position not memorized Memory: Position memorized	-
Tilt&Telescopic Memory 1	Tilt and telescopic memory position 1	Not Memory or Memory	Not Memory: Position not memorized Memory: Position memorized	-
Tilt&Telescopic Memory 2	Tilt and telescopic memory position 2	Not Memory or Memory	Not Memory: Position not memorized Memory: Position memorized	-
Tilt&Telescopic Memory 3	Tilt and telescopic memory position 3	Not Memory or Memory	Not Memory: Position not memorized Memory: Position memorized	-
Driver Information Memory 1	Driver Information Memory 1	Not Memory or Memory	-	-
Driver Information Memory 2	Driver Information Memory 2	Not Memory or Memory	-	-
Driver Information Memory 3	Driver Information Memory 3	Not Memory or Memory	-	-
Ignition Switch (CAN)	Communication state of power switch	OFF or ON	ON: Communication normal OFF: Communication interrupted	-
Handle Position	Steering wheel position signal	Away or Return	Away: Steering wheel in away position Return: Steering wheel in return position	-
Ignition Switch	Input state of power switch	OFF or ON	ON: Input signal normal OFF: Input signal interrupted	-
Tilt Manual Switch Up	Input state of tilt up switch	OFF or ON	-	-
Tilt Manual Switch Down	Input state of tilt down switch	OFF or ON	-	-
Telescopic Manual Switch Short	Input state of telescopic contract switch	OFF or ON	-	-
Telescopic Manual Switch Long	Input state of telescopic extend switch	OFF or ON	-	-
Tilt&Telescopic Manual Switch Voltage	Voltage data of tilt and telescopic switch	Min.: 0.000 V Max.: 4.998 V	Neutral position: Below 0.20 V Tilt up: 1.67 to 2.13 V Tilt down: 0.54 to 0.74 V Telescopic contract: 1.08 to 1.40 V Telescopic extend: 2.22 to 2.77 V	-
ECU Power Source Voltage	Voltage data of power supply	Min.: 0.000 V Max.: 19.992 V	11.00 to 14.00 V	-
Tilt Position	Current tilt position data	Min.: 0 Max.: 65535	28627 to 36864	-
Telescopic Position	Current telescopic position data	Min.: 0 Max.: 65535	28627 to 36864	-
Tilt Return Memory Position	Memorized tilt return position data	Min.: 0 Max.: 65535	28627 to 36864	-
Telescopic Return Memory Position	Memorized telescopic return position data	Min.: 0 Max.: 65535	28627 to 36864	-
Tilt Up Limit Position	Uppermost tilt position data	Min.: 0 Max.: 65535	28627 to 36864	-
Tilt Down Limit Position	Lowermost tilt position data	Min.: 0 Max.: 65535	28627 to 36864	-
Telescopic Short Limit Position	Shortest telescopic position data	Min.: 0 Max.: 65535	28627 to 36864	-
Telescopic Long Limit Position	Longest telescopic position data	Min.: 0 Max.: 65535	28627 to 36864	-
Tilt Memory Position 1	Tilt data of memory position 1	Min.: 0 Max.: 65535	28627 to 36864	-
Telescopic Memory Position 1	Telescopic data of memory position 1	Min.: 0 Max.: 65535	28627 to 36864	-
Tilt Memory Position 2	Tilt data of memory position 2	Min.: 0 Max.: 65535	28627 to 36864	-
Telescopic Memory Position 2	Telescopic data of memory position 2	Min.: 0 Max.: 65535	28627 to 36864	-
Tilt Memory Position 3	Tilt data of memory position 3	Min.: 0 Max.: 65535	28627 to 36864	-
Telescopic Memory Position 3	Telescopic data of memory position 3	Min.: 0 Max.: 65535	28627 to 36864	-
Vehicle Speed	Vehicle speed data	Min.: 0 km/h (0 mph) Max.: 255 km/h (158 mph)	Actual vehicle speed	-
Driver Tilt Memory Position 1	Driver tilt memory position 1	Min.: 0 Max.: 65535	28627 to 36864	-
Driver Telescopic Memory Position 1	Driver telescopic memory position 1	Min.: 0 Max.: 65535	28627 to 36864	-
Driver Tilt Memory Position 2	Driver tilt memory position 2	Min.: 0 Max.: 65535	28627 to 36864	-
Driver Telescopic Memory Position 2	Driver telescopic memory position 2	Min.: 0 Max.: 65535	28627 to 36864	-
Driver Tilt Memory Position 3	Driver tilt memory position 3	Min.: 0 Max.: 65535	28627 to 36864	-
Driver Telescopic Memory Position 3	Driver telescopic memory position 3	Min.: 0 Max.: 65535	28627 to 36864	-
Tilt Motor Machine Lock Memory Data	Tilt Motor Machine Lock Memory Data	Not Exist or Existed	-	-
Telescopic Motor Machine Lock Memory Data	Telescopic Motor Machine Lock Memory Data	Not Exist or Existed	-	-
Autoaway/Return Operation Setting	Autoaway/Return Operation Setting	Tilt&Telescopic OFF, Telescopic ON, Tilt ON or Tilt&Telescopic ON	Tilt&Telescopic OFF: Tilt and telescopic operations prohibited Telescopic ON: Only telescopic operations permitted Tilt ON: Only tilt operations permitted Tilt&Telescopic ON: Tilt and telescopic operations permitted	-

ACTIVE TEST

HINT:

Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.

(a) Turn the power switch off.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / Tilt & Telescopic / Active Test.

(f) According to the display on the Techstream, perform the Active Test.

Body Electrical > Tilt&Telescopic > Active Test

Tester Display	Measurement Item	Control Range
Tilt Motor	Tilt operation	UP/DOWN
Telescopic Motor	Telescopic operation	LONG/SHORT

Diagnosis System

DIAGNOSIS SYSTEM

DESCRIPTION

(a) When troubleshooting a vehicle with the diagnostic system, the only difference from the usual troubleshooting procedure is connecting the Techstream to the vehicle and reading various data output from the multiplex tilt and telescopic ECU.

The multiplex tilt and telescopic ECU stores DTCs when the ECU detects a malfunction in itself or in its circuits.

To check the DTCs, connect the Techstream to the DLC3 on the vehicle. The Techstream enables the DTCs to be cleared, several actuators to be activated, and the freeze frame data and various forms of steering data to be checked.

CHECK DLC3

(a) Check the DLC3.

Click here

Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART

Power Tilt and Power Telescopic Steering Column System

DTC No.	Detection Item	DTC Detection Condition
B26031C	Tilt and Telescopic Manual Switch Circuit Circuit Voltage Out of Range	When operating the tilt and telescopic switch, an abnormal voltage value is sent to the multiplex tilt and telescopic ECU.
B261096	Tilt Position Sensor or Tilt Motor Circuit Component Internal Failure	Tilt operation stops within the operation range while operating.
B261196	Telescopic Position Sensor or Telescopic Motor Circuit Component Internal Failure	Telescopic operation stops within the operation range while operating.
B2620A2	ECU Power Source Circuit System Voltage Low	The voltage of the ECU power source drops to 8 V or less for 10 seconds or more.
U014287	Lost Communication with Body Control Module "B" Missing Message	One of the following conditions is met: Signals (memory-related data) from the main body ECU (multiplex network body ECU) are interrupted for 3.3 seconds. Signals (IG switch signals) from the main body ECU (multiplex network body ECU) are interrupted for 10 seconds or more.
U015587	Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message	Signals from the combination meter assembly are interrupted for 10 seconds or more.
U020887	Lost Communication with "Seat Control Module A" Missing Message	Signals (memory or recall request signal) received from the position control ECU assembly (driver seat) are interrupted for 10 seconds or more.

Dtc Check / Clear

DTC CHECK / CLEAR

CHECK DTC

(a) Turn the power switch off.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / Tilt & Telescopic / Trouble Codes.

Body Electrical > Tilt&Telescopic > Trouble Codes

(f) Read the DTCs.

Click here

CLEAR DTC

(a) Turn the power switch off.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / Tilt & Telescopic / Trouble Codes.

Body Electrical > Tilt&Telescopic > Clear DTCs

(f) Clear the DTCs.

Fail-safe Chart

FAIL-SAFE CHART

HINT:

If the power source voltage to the multiplex tilt and telescopic ECU returns to normal within 10 seconds during tilt or telescopic operation, the operation will be resumed. If it returns to normal after 10 seconds have elapsed, the operation restarts when a tilt or telescopic operation signal is sent to the multiplex tilt and telescopic ECU again.

Fail-safe Operation

DTC Code	Detection Item	Fail-safe Operation
B26031C	Tilt and Telescopic Manual Switch Circuit Circuit Voltage Out of Range	The tilt and telescopic operation using the switch is suspended.
B261096	Tilt Position Sensor or Tilt Motor Circuit Component Internal Failure	The tilt operation is suspended.
B261196	Telescopic Position Sensor or Telescopic Motor Circuit Component Internal Failure	The telescopic operation is suspended.
B2620A2	ECU Power Source Circuit System Voltage Low	The tilt and telescopic operation is suspended.
U014287	Lost Communication with Body Control Module "B" Missing Message	The tilt and telescopic operation is limited depending on which ECU has lost communication. For details, refer to Fail-safe Function.
U015587	Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message
U020887	Lost Communication with "Seat Control Module A" Missing Message

FAIL-SAFE FUNCTION

(a) If a malfunction in the tilt position sensor signal or telescopic position sensor signal occurs while operating the power tilt or power telescopic function, the multiplex tilt and telescopic ECU stops the operation of the power tilt and power telescopic steering column system.

(b) If the power source voltage to the ECU drops below approximately 8 V while operating the power tilt or power telescopic function, the ECU stops the operation of the power tilt and power telescopic steering column system.

(c) If the ECU detects that the motor has locked during the operation of the power tilt or power telescopic function, the ECU stops the operation of the power tilt and power telescopic steering column system.

(d) If the communication of an ECU that is related to the power tilt and power telescopic steering column system is interrupted, the control of functions of the multiplex tilt and telescopic ECU are limited as shown in the table below.

Tilt and Telescopic Operation	Main Body ECU (Multiplex Network Body ECU) Communication Interruption	Combination Meter Assembly Communication Interruption	Position Control ECU Assembly (Driver Seat) Communication Interruption	All ECUs*1 Communication Interruption
Manual	○*2	○	○	○*2
Auto away/return	X	X	○	X
Position memory (Memorization)	X	○	○	X
Position memory (Recall)	X	X	X	X

HINT:

○: Operates
X: Does not operate
*1: All ECUs that are related to the power tilt and power telescopic steering column system.
*2: The operation is permitted if the power switch is on (IG) while the signal from the main body ECU (multiplex network body ECU) is interrupted. The operation is prohibited if the power switch is off while the signal from the main body ECU (multiplex network body ECU) is interrupted.

Freeze Frame Data

FREEZE FRAME DATA

FREEZE FRAME DATA

NOTICE:

Freeze frame data values will vary depending on the measurement conditions, surroundings, or vehicle conditions. For this reason, there may be a problem even when the values are within specifications.
Turn the power switch on (IG) and park the vehicle on level ground. Check the freeze frame data by using the Techstream.

(a) Turn the power switch off.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Check the freeze frame data.

(f) Enter the following menus: Body Electrical / Tilt & Telescopic / Trouble Codes.

Body Electrical > Tilt&Telescopic > Trouble Codes Body Electrical > Tilt&Telescopic

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Total Distance Traveled	Driving distance	Min.: 0 Max.: 999999	-	-
Total Distance Traveled - Unit	Driving distance unit	km or mile	-	-
Tilt Up Limit	Uppermost tilt position	Not Memory or Memory	Not Memory: Position not memorized Memory: Position memorized	-
Tilt Down Limit	Uppermost tilt position	Not Memory or Memory	Not Memory: Position not memorized Memory: Position memorized	-
Telescopic Short Limit	Shortest telescopic position	Not Memory or Memory	Not Memory: Position not memorized Memory: Position memorized	-
Telescopic Long Limit	Longest telescopic position	Not Memory or Memory	Not Memory: Position not memorized Memory: Position memorized	-
Tilt&Telescopic Memory 1	Tilt and telescopic memory position 1	Not Memory or Memory	Not Memory: Position not memorized Memory: Position memorized	-
Tilt&Telescopic Memory 2	Tilt and telescopic memory position 2	Not Memory or Memory	Not Memory: Position not memorized Memory: Position memorized	-
Tilt&Telescopic Memory 3	Tilt and telescopic memory position 3	Not Memory or Memory	Not Memory: Position not memorized Memory: Position memorized	-
Driver Information Memory 1	Driver Information Memory 1	Not Memory or Memory	-	-
Driver Information Memory 2	Driver Information Memory 2	Not Memory or Memory	-	-
Driver Information Memory 3	Driver Information Memory 3	Not Memory or Memory	-	-
Ignition Switch (CAN)	Communication state of power switch	OFF or ON	ON: Communication normal OFF: Communication interrupted	-
Handle Position	Steering wheel position signal	Away or Return	Away: Steering wheel in away position Return: Steering wheel in return position	-
Ignition Switch	Input state of power switch	OFF or ON	ON: Input signal normal OFF: Input signal interrupted	-
Tilt Manual Switch Up	Input state of tilt up switch	OFF or ON	-	-
Tilt Manual Switch Down	Input state of tilt down switch	OFF or ON	-	-
Telescopic Manual Switch Short	Input state of telescopic contract switch	OFF or ON	-	-
Telescopic Manual Switch Long	Input state of telescopic extend switch	OFF or ON	-	-
Tilt&Telescopic Manual Switch Voltage	Voltage data of tilt and telescopic switch	Min.: 0.000 V Max.: 4.998 V	Neutral position: Below 0.20 V Tilt up: 1.67 to 2.13 V Tilt down: 0.54 to 0.74 V Telescopic contract: 1.08 to 1.40 V Telescopic extend: 2.22 to 2.77 V	-
ECU Power Source Voltage	Voltage data of power supply	Min.: 0.000 V Max.: 19.992 V	11.00 to 14.00 V	-
Tilt Position	Current tilt position data	Min.: 0 Max.: 65535	28627 to 36864	-
Telescopic Position	Current telescopic position data	Min.: 0 Max.: 65535	28627 to 36864	-
Tilt Return Memory Position	Memorized tilt return position data	Min.: 0 Max.: 65535	28627 to 36864	-
Telescopic Return Memory Position	Memorized telescopic return position data	Min.: 0 Max.: 65535	28627 to 36864	-
Tilt Up Limit Position	Uppermost tilt position data	Min.: 0 Max.: 65535	28627 to 36864	-
Tilt Down Limit Position	Lowermost tilt position data	Min.: 0 Max.: 65535	28627 to 36864	-
Telescopic Short Limit Position	Shortest telescopic position data	Min.: 0 Max.: 65535	28627 to 36864	-
Telescopic Long Limit Position	Longest telescopic position data	Min.: 0 Max.: 65535	28627 to 36864	-
Tilt Memory Position 1	Tilt data of memory position 1	Min.: 0 Max.: 65535	28627 to 36864	-
Telescopic Memory Position 1	Telescopic data of memory position 1	Min.: 0 Max.: 65535	28627 to 36864	-
Tilt Memory Position 2	Tilt data of memory position 2	Min.: 0 Max.: 65535	28627 to 36864	-
Telescopic Memory Position 2	Telescopic data of memory position 2	Min.: 0 Max.: 65535	28627 to 36864	-
Tilt Memory Position 3	Tilt data of memory position 3	Min.: 0 Max.: 65535	28627 to 36864	-
Telescopic Memory Position 3	Telescopic data of memory position 3	Min.: 0 Max.: 65535	28627 to 36864	-
Vehicle Speed	Vehicle speed data	Min.: 0 km/h (0 mph) Max.: 255 km/h (158 mph)	Actual vehicle speed	-
Driver Tilt Memory Position 1	Driver tilt memory position 1	Min.: 0 Max.: 65535	28627 to 36864	-
Driver Telescopic Memory Position 1	Driver telescopic memory position 1	Min.: 0 Max.: 65535	28627 to 36864	-
Driver Tilt Memory Position 2	Driver tilt memory position 2	Min.: 0 Max.: 65535	28627 to 36864	-
Driver Telescopic Memory Position 2	Driver telescopic memory position 2	Min.: 0 Max.: 65535	28627 to 36864	-
Driver Tilt Memory Position 3	Driver tilt memory position 3	Min.: 0 Max.: 65535	28627 to 36864	-
Driver Telescopic Memory Position 3	Driver telescopic memory position 3	Min.: 0 Max.: 65535	28627 to 36864	-
Tilt Motor Machine Lock Memory Data	Tilt Motor Machine Lock Memory Data	Not Exist or Existed	-	-
Telescopic Motor Machine Lock Memory Data	Telescopic Motor Machine Lock Memory Data	Not Exist or Existed	-	-
Autoaway/Return Operation Setting	Autoaway/Return Operation Setting	Tilt&Telescopic OFF, Telescopic ON, Tilt ON or Tilt&Telescopic ON	Tilt&Telescopic OFF: Tilt and telescopic operations prohibited Telescopic ON: Only telescopic operations permitted Tilt ON: Only tilt operations permitted Tilt&Telescopic ON: Tilt and telescopic operations permitted	-

How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

*: Use the Techstream.

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

2.	INSPECT AUXILIARY BATTERY VOLTAGE

Standard Voltage:

11 to 14 V (Power switch off)

If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding.

3.	CHECK CAN COMMUNICATION SYSTEM*

(a) Use the Techstream to check if the CAN communication system is functioning normally.

Click here

Result	Proceed to
CAN DTCs are not output.	A
CAN DTCs are output.	B

GO TO CAN COMMUNICATION SYSTEM

4.	CHECK FOR DTCs*

(a) Check for DTCs.

Body Electrical > Tilt&Telescopic > Trouble Codes

Result	Proceed to
DTCs are not output.	A
DTCs are output.	B

GO TO DIAGNOSTIC TROUBLE CODE CHART

5.	PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table.

Click here

Result	Proceed to
Problem symptom does not occur.	A
Problem symptom occurs.	B

GO TO STEP 7

6.	OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Terminals of ECU.

Click here

(b) Data List / Active Test.

Click here

REPAIR

8.	CONFIRMATION TEST

END

IG Power Source Circuit

DESCRIPTION

When the power switch is turned on (IG), the IG power source circuit supplies positive (+) voltage to the multiplex tilt and telescopic ECU.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - AUXILIARY BATTERY)

(a) Disconnect the G49 multiplex tilt and telescopic ECU connector.

*a	Front view of wire harness connector (to Multiplex Tilt and Telescopic ECU)

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
G49-10 (IG) - Body ground	Power switch on (IG)	11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.	CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - BODY GROUND)

(a) Disconnect the G49 multiplex tilt and telescopic ECU connector.

*a	Front view of wire harness connector (to Multiplex Tilt and Telescopic ECU)

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
G49-1 (GND) - Body ground	Always	Below 1 Ω
G49-8 (GND2) - Body ground	Always	Below 1 Ω

REPLACE MULTIPLEX TILT AND TELESCOPIC ECU

REPAIR OR REPLACE HARNESS OR CONNECTOR

Parts Location

PARTS LOCATION

ILLUSTRATION

*1	TILT AND TELESCOPIC SWITCH	*2	STEERING COLUMN ASSEMBLY
*3	NO. 1 ENGINE ROOM RELAY BLOCK AND NO. 1 JUNCTION BLOCK ASSEMBLY - TI&TE FUSE	*4	INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - ECU-DCC NO. 2 FUSE - ECU-IG1 NO. 4 FUSE
*5	MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)	*6	COMBINATION METER ASSEMBLY
*7	RADIO AND DISPLAY RECEIVER ASSEMBLY	*8	NETWORK GATEWAY ECU
*9	MULTIPLEX TILT AND TELESCOPIC ECU	*10	DLC3
*11	OUTER MIRROR CONTROL ECU ASSEMBLY (Driver Door)	*12	SEAT MEMORY SWITCH
*13	POSITION CONTROL ECU ASSEMBLY (Driver Seat)	*14	FRONT SEAT INNER BELT ASSEMBLY (Driver Seat)

Precaution

PRECAUTION

PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL

NOTICE:

When disconnecting the cable from the negative (-) auxiliary battery terminal, initialize the following system(s) after the cable is reconnected:

System	See Procedure
Lane Departure Alert System (w/ Steering Control)
Intelligent Clearance Sonar System
Parking Assist Monitor System
Panoramic View Monitor System
Pre-collision System
Lighting System (for HV Model with Cornering Light)

HANDLING PRECAUTIONS

(a) When handling electronic parts:

(1) Avoid any impact to electronic parts such as ECUs and relays. Replace these parts with new ones if dropped or subjected to a severe blow.

(2) Do not expose any electronic parts to high temperatures or humidity.

(3) Do not touch the connector terminals in order to prevent deformation or malfunctions due to static electricity.

NOTICE:

This vehicle is equipped with a Supplemental Restraint System (SRS). Failure to carry out service operations in the correct sequence could cause the SRS to unexpectedly deploy during servicing. This may cause a serious accident.

Before servicing (including inspection, replacement, removal and installation of parts), be sure to read the precautionary notices for Supplemental Restraint System.

Click here

HANDLING PRECAUTIONS FOR SRS AIRBAG SYSTEM

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

HINT:

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table.
Check each system by checking the suspected areas in the order they are listed. Replace parts as necessary.
Inspect the fuses and relays related to this system before inspecting the suspected area below.

Power Tilt and Power Telescopic Steering Column System

Symptom	Suspected Area	Link
Only manual switch does not operate	Tilt and telescopic manual switch circuit
Only auto away/return function does not operate	Check customize status of auto away/return function using the Techstream
Only auto away/return function does not operate	IG power source circuit
Only auto away function does not operate	Smart key system (for start function)
Only auto away function does not operate	Multiplex tilt and telescopic ECU
Only auto return function does not operate	Smart key system (for start function)
Only auto return function does not operate	Multiplex tilt and telescopic ECU
Only microcomputer preset memory/recall function does not operate with the set switch operation	Front power seat control system (w/ Memory)
	Seat memory switch
	Position control ECU assembly (Driver Seat)
	Multiplex tilt and telescopic ECU

System Description

SYSTEM DESCRIPTION

FUNCTION OF MAIN COMPONENTS

Component

Function

Multiplex tilt and telescopic ECU

This ECU sends a control signal to the tilt motor (steering column assembly) and telescopic motor (steering column assembly), based on signals from each switch, to adjust the steering position.

Tilt motor (steering column assembly)

This motor is activated by a signal from the multiplex tilt and telescopic ECU and adjusts the tilt position.

The tilt position sensor in the motor detects the tilt position by counting the number of pulses as the motor rotates.

Telescopic motor (steering column assembly)

This motor is activated by a signal from the multiplex tilt and telescopic ECU and adjusts the telescopic position.

The telescopic position sensor in the motor detects the telescopic position by counting the number of pulses as the motor rotates.

MANUAL OPERATION

(a) The tilt and telescopic positions can be adjusted as desired by operating the tilt and telescopic switch.

AUTO AWAY/RETURN FUNCTION

(a) When the power source mode is changed from on (ACC) or on (IG) to off, and the multiplex tilt and telescopic ECU receives a seat belt release signal, the steering wheel automatically tilts up and fully retracts.

HINT:

The default setting for the telescopic system of the auto away/return function is off. Whether or not the telescopic system of the auto away/return function operates can be set using customize settings.

(b) When the power source mode is changed from off to on (ACC) or on (IG), or the multiplex tilt and telescopic ECU receives a seat belt fastened signal, the steering wheel automatically returns to the previous position which was set before the power source was turned off.

Click here

DRIVING POSITION MEMORY FUNCTION

(a) The system can memorize/recall two driving positions by operating the seat memory switch. Even if these positions are changed when a driver is getting in/out, it can recall the memory position by one-touch operation if the steering wheel column position, seat position and outer mirror surface position of the driver are stored.

System Diagram

SYSTEM DIAGRAM

Communication Table

Transmitting ECU (Transmitter)	Receiving ECU	Signal	Communication Method
Main Body ECU (Multiplex Network Body ECU)	Multiplex Tilt and Telescopic ECU	IG SW signal Store command of driver seat memory Recall command of driver seat memory Auto away/return state signal	CAN
Position Control ECU Assembly (Driver Seat)	Multiplex Tilt and Telescopic ECU	Memory recall signal Start signal to play tilt and telescopic steering Stop signal to play memory
Combination Meter Assembly	Multiplex Tilt and Telescopic ECU	Vehicle speed signal
Multiplex Tilt and Telescopic ECU	Main Body ECU (Multiplex Network Body ECU)	State signal of tilt and telescopic steering
Multiplex Tilt and Telescopic ECU	Position Control ECU Assembly (Driver Seat)	Tilt and telescopic recall and execution signal Tilt and telescopic recall and end signal
Tilt and Telescopic Switch	Multiplex Tilt and Telescopic ECU	Tilt and Telescopic Switch signal	Direct line

Terminals Of Ecu

TERMINALS OF ECU

MULTIPLEX TILT AND TELESCOPIC ECU

Component with harness connected

(Multiplex Tilt and Telescopic ECU)

(a) Measure the voltage and resistance according to the value(s) in the table below.

HINT:

Inspect the connectors from the back side while the connectors are connected.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
G49-1 (GND) - Body ground	W-B - Body ground	ECU ground	Always	Below 1 Ω
G49-2 (+B) - G49-1 (GND)	B - W-B	Motor power source	Always	11 to 14 V
G49-3 (CANP) - G49-11 (CANN)	R - W	CAN communication	Power switch off	54 to 69 Ω
G49-4 (E1) - Body ground	BE - Body ground	Tilt sensor ground	Always	Below 1 Ω
G49-5 (VC) - G49-18 (MSW)	L - GR	Tilt and telescopic switch signal	Power switch on (IG)	4.9 to 5.1 V
G49-6 (TEM+) - G49-1 (GND)	LA-B - W-B	Telescopic motor output	Power switch on (IG) Steering column contracting	11 to 14 V
G49-6 (TEM+) - G49-1 (GND)	LA-B - W-B	Telescopic motor output	Telescopic motor not operating	Below 1 V
G49-7 (TIM+) - G49-1 (GND)	LA-LG - W-B	Tilt motor output	Power switch on (IG) Steering wheel tilting up	11 to 14 V
G49-7 (TIM+) - G49-1 (GND)	LA-LG - W-B	Tilt motor output	Tilt motor not operating	Below 1 V
G49-8 (GND2) - Body ground	W-B - Body ground	ECU ground	Always	Below 1 Ω
G49-9 (ECUB) - G49-1 (GND)	G - W-B	ECU power source	Always	11 to 14 V
G49-10 (IG) - G49-1 (GND)	L - W-B	IG signal / IG power source	Power switch on (IG)	11 to 14 V
G49-10 (IG) - G49-1 (GND)	L - W-B	IG signal / IG power source	Power switch off	Below 1 V
G49-13 (VCI) - G49-4 (E1)	B - BE	Tilt sensor power source	Power switch on (IG)	8 to 14 V
G49-14 (VCE) - G49-17 (E2)	GR - LG	Telescopic sensor power source	Power switch on (IG)	8 to 14 V
G49-15 (TES) - G49-17 (E2)	R - LG	Telescopic sensor signal	Telescopic motor operating	Pulse generation HI: 8 to 14 V LOW: Below 1 V
G49-16 (TIS) - G49-4 (E1)	W - BE	Tilt sensor signal	Tilt motor operating	Pulse generation HI: 8 to 14 V LOW: Below 1 V
G49-17 (E2) - Body ground	LG - Body ground	Telescopic sensor ground	Always	Below 1 Ω
G49-19 (TEM-) - G49-1 (GND)	LA-G - W-B	Telescopic motor output	Power switch on (IG) Steering column extending	11 to 14 V
G49-19 (TEM-) - G49-1 (GND)	LA-G - W-B	Telescopic motor output	Telescopic motor not operating	Below 1 V
G49-20 (TIM-) - G49-1 (GND)	LA-L - W-B	Tilt motor output	Power switch on (IG) Steering wheel tilting down	11 to 14 V
G49-20 (TIM-) - G49-1 (GND)	LA-L - W-B	Tilt motor output	Tilt motor not operating	Below 1 V

Tilt and Telescopic Manual Switch Circuit

DESCRIPTION

Different voltage values are sent to the multiplex tilt and telescopic ECU by operating the tilt and telescopic switch. The multiplex tilt and telescopic ECU then judges which motor and in which direction that motor should operate based on the voltage value.

WIRING DIAGRAM

PROCEDURE

1.	READ VALUE USING TECHSTREAM (TILT MANUAL SWITCH UP/DOWN, TELESCOPIC MANUAL SWITCH SHORT/LONG)

(a) Turn the power switch off.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Tilt&Telescopic > Data List

Tester Display
Tilt Manual Switch Up
Tilt Manual Switch Down
Telescopic Manual Switch Short
Telescopic Manual Switch Long

Body Electrical > Tilt&Telescopic > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Tilt Manual Switch Up	Input state of tilt up switch	OFF or ON	-	-
Tilt Manual Switch Down	Input state of tilt down switch	OFF or ON	-	-
Telescopic Manual Switch Short	Input state of telescopic contract switch	OFF or ON	-	-
Telescopic Manual Switch Long	Input state of telescopic extend switch	OFF or ON	-	-

OK:

The value of each Data List item changes in accordance with the operation of the switch.

REPLACE MULTIPLEX TILT AND TELESCOPIC ECU

2.	CHECK HARNESS AND CONNECTOR (MULTIPLEX TILT AND TELESCOPIC ECU - TILT AND TELESCOPIC SWITCH)

(a) Disconnect the G49 multiplex tilt and telescopic ECU connector.

(b) Disconnect the G30 tilt and telescopic switch connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
G49-5 (VC) - G30-1 (VC)	Always	Below 1 Ω
G49-18 (MSW) - G30-3 (MSW)	Always	Below 1 Ω
G49-5 (VC) or G30-1 (VC) - Body ground	Always	10 kΩ or higher
G49-18 (MSW) or G30-3 (MSW) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	CHECK MULTIPLEX TILT AND TELESCOPIC ECU (VC TERMINAL VOLTAGE)

(a) Reconnect the G49 multiplex tilt and telescopic ECU connector.

*a	Component with harness connected (Multiplex Tilt and Telescopic ECU)

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
G49-5 (VC) - G49-18 (MSW)	Power switch on (IG)	4.9 to 5.1 V

REPLACE MULTIPLEX TILT AND TELESCOPIC ECU

4.	CHECK TILT AND TELESCOPIC SWITCH

(a) Remove the tilt and telescopic switch.

Click here

*a	Component without harness connected (Tilt and Telescopic Switch)

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
G30-1 (VC) - G30-3 (MSW)	Tilt up	342 to 378 Ω
	Tilt down	1890.5 to 2089.5 Ω
	Telescopic contract	750.5 to 829.5 Ω
	Telescopic extend	152 to 168 Ω

REPLACE MULTIPLEX TILT AND TELESCOPIC ECU

REPLACE TILT AND TELESCOPIC SWITCH

Power Tilt And Power Telescopic Steering Column System(for Gasoline Model)

Steering Column Assembly(for Manual Tilt And Manual Telescopic Steering Column)

See More:

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