Toyota CH-R Service Manual: Torque Sensor1 (C1511-C1514,C1517)

Toyota CH-R Service Manual / Power Assist Systems / Power Steering System / Torque Sensor1 (C1511-C1514,C1517)

DESCRIPTION

The torque sensor converts the rotational torque received from the steering wheel into electric signals and sends them to the power steering ECU assembly.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Warning Indicate	Return-to-normal Condition	Note
C1511	Torque Sensor1	Torque sensor malfunction	Torque sensor (Electric power steering column sub-assembly) Power steering ECU assembly	EPS warning light: Comes on	The ECU judges the system has returned to normal or the ignition switch ON again	-
C1512	Torque Sensor2	Torque sensor malfunction	Torque sensor (Electric power steering column sub-assembly) Power steering ECU assembly	EPS warning light: Comes on	The ECU judges the system has returned to normal or the ignition switch ON again	-
C1513	Torque Sensor Deviation Excessive	Torque sensor malfunction	Torque sensor (Electric power steering column sub-assembly) Power steering ECU assembly	EPS warning light: Comes on	The ECU judges the system has returned to normal or the ignition switch ON again	-
C1514	Torque Sensor Power Supply Voltage	Torque sensor malfunction	Torque sensor (Electric power steering column sub-assembly) Power steering ECU assembly	EPS warning light: Comes on	Ignition switch ON again	-
C1517	Torque Hold	Torque sensor malfunction	Torque sensor (Electric power steering column sub-assembly) Power steering ECU assembly	EPS warning light: Comes on	Ignition switch ON again	-

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

If the electric power steering column sub-assembly has been replaced, perform torque sensor zero point calibration.
Click here
If the power steering ECU assembly has been replaced, perform assist map writing and torque sensor zero point calibration.
Click here

PROCEDURE

1.	CHECK CONNECTOR CONNECTION CONDITION

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

OK:

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

CONNECT CONNECTOR

2.	CHECK POWER STEERING ECU ASSEMBLY (TRQV VOLTAGE)

(a) Turn the ignition switch to ON.

*a	Component with harness connected (Power Steering ECU Assembly)

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
z3-7 (TRQV1) - z3-8 (TRQG1)	Ignition switch ON	4.5 to 5.5 V
z3-3 (TRQV2) - z3-2 (TRQG2)	Ignition switch ON	4.5 to 5.5 V

REPLACE POWER STEERING ECU ASSEMBLY

3.	CHECK POWER STEERING ECU ASSEMBLY (TRQ1, TRQ2 VOLTAGE)

(a) Turn the engine running.

*a	Component with harness connected (Power Steering ECU Assembly)

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
z3-9 (TRQ1) - z3-8 (TRQG1)	Engine running and steering wheel not being turned (without load)	2.3 to 2.7 V
	Engine running and steering wheel being turned to the right with vehicle stopped	2.5 to 3.8 V
	Engine running and steering wheel being turned to the left with vehicle stopped	1.2 to 2.5 V
z3-1 (TRQ2) - z3-2 (TRQG2)	Engine running and steering wheel not being turned (without load)	2.3 to 2.7 V
	Engine running and steering wheel being turned to the right with vehicle stopped	1.2 to 2.5 V
	Engine running and steering wheel being turned to the left with vehicle stopped	2.5 to 3.8 V

Standard Voltage:

Tester Connection	Condition	Specified Condition
Sum of voltage between z3-9 (TRQ1) and z3-8 (TRQG1) and voltage between z3-1 (TRQ2) and z3-2 (TRQG2)	Engine running and steering wheel not being turned (without load)	Between 4.75 V and 5.25 V
	Engine running and steering wheel being turned to the right with vehicle stopped
	Engine running and steering wheel being turned to the left with vehicle stopped

REPLACE POWER STEERING ECU ASSEMBLY

REPLACE ELECTRIC POWER STEERING COLUMN SUB-ASSEMBLY

PIG Power Supply Voltage (C1552,C1554)

DESCRIPTION If a problem occurs in the system, the power source relay circuit and the motor relay circuit are shut off to stop power assist. The ECU must be replaced when there is a problem with ...

Torque Sensor Zero Point Adjustment Undone (C1515)

DESCRIPTION This DTC does not indicate a malfunction. The power steering ECU assembly stores this DTC when it determines that torque sensor zero point calibration has not been performed. ...

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