Toyota Venza manuals

Toyota Venza: Torque Sensor Circuit Malfunction (C1511-C1514,C1517)

Toyota Venza Service Manual / Power Assist Systems / Power Steering System / Torque Sensor Circuit Malfunction (C1511-C1514,C1517)

DESCRIPTION

The torque sensor converts the rotation torque input to the steering wheel into an electrical signal and sends it to the power steering ECU. Based on this signal, the ECU detects steering effort.

DTC No.

DTC Detection Condition

Trouble Area

C1511

Torque sensor (TRQ1) signal error or stop

  • Steering column assembly (torque sensor)
  • Power steering ECU

C1512

Torque sensor (TRQ2) signal error or stop

C1513

Deviation between torque sensors TRQ1 and TRQ2 exceeds specified value

C1514

Torque sensor power source voltage error

C1517

Temporary control due to malfunction related to torque sensor continues for long time

WIRING DIAGRAM


CAUTION / NOTICE / HINT

NOTICE:

If the power steering ECU and steering column assembly have been replaced, perform the rotation angle sensor initialization and torque sensor zero point calibration (See page ).


PROCEDURE

1.

CHECK CONNECTOR CONNECTION CONDITION (TORQUE SENSOR - ECU)

(a) Check the installation condition of the torque sensor connector.

OK:

Torque sensor connector is securely connected to the power steering ECU.


NG

CONNECT CONNECTOR


OK

2.

CHECK POWER STEERING ECU (TRQV VOLTAGE)

(a) Turn the ignition switch to ON.


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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

z10-6 (TRQV) - z10-8 (TRQG)

Ignition switch ON

4.5 to 5.5 V

Text in Illustration

*1

Component with harness connected

(Power Steering ECU)


NG

REPLACE POWER STEERING ECU


OK

3.

CHECK POWER STEERING ECU (TRQ1, TRQ2 VOLTAGE)

(a) Start the engine.


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

Standard Voltage:

Tester Connection

Condition

Specified Condition

z10-5 (TRQ1) - z10-8 (TRQG)

The engine running, steering wheel not turned (without load).

2.3 to 2.7 V

The engine running, steering wheel turned to right with vehicle stopped.

2.5 to 3.8 V

The engine running, steering wheel turned to left with vehicle stopped.

1.2 to 2.5 V

z10-7 (TRQ2) - z10-8 (TRQG)

The engine running, steering wheel not turned (without load).

2.3 to 2.7 V

The engine running, steering wheel turned to right with vehicle stopped.

1.2 to 2.5 V

The engine running, steering wheel turned to left with vehicle stopped.

2.5 to 3.8 V

(c) Under each condition, measure the voltage at terminals TRQ1 and TRQ2, and calculate the sum.

Standard Voltage:

Inspection Item

Condition

Specified Condition

Sum of voltage between z10-5 (TRQ1) and z10-8 (TRQG) and voltage between z10-7 (TRQ2) and z10-8 (TRQG)

The engine running, steering wheel not turned (without load).

Between 4.75 V and 5.25 V

The engine running, steering wheel turned to right with vehicle stopped.

The engine running, steering wheel turned to left with vehicle stopped.

Text in Illustration

*1

Component with harness connected

(Power Steering ECU)


OK

REPLACE POWER STEERING ECU


NG

REPLACE STEERING COLUMN ASSEMBLY

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