Toyota Camry (XV70): Torque Sensor1 (C1511-C1514,C1517,C1521-C1523,C1528,C1531-C1555)

Toyota Camry Repair Manual XV70 (2018-2024) / Steering / Power Assist Systems / Power Steering System / Torque Sensor1 (C1511-C1514,C1517,C1521-C1523,C1528,C1531-C1555)

DESCRIPTION

While torque sensor system, motor system or ECU system malfunctions are detected, the fail-safe function suspends power assist. However, power assist continues with limited assistance amount if only C1533 or C1534 is output.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Warning Indicate	Return-to-normal Condition	Note
C1511	Torque Sensor1	Torque sensor malfunction	Rack and pinion power steering gear assembly	EPS warning light: Comes on	Ignition switch is turned to ON again	-
C1512	Torque Sensor2	Torque sensor malfunction	Rack and pinion power steering gear assembly	EPS warning light: Comes on	Ignition switch is turned to ON again	-
C1513	Torque Sensor Deviation Excessive	Torque sensor malfunction	Rack and pinion power steering gear assembly	EPS warning light: Comes on	Ignition switch is turned to ON again	-
C1514	Torque Sensor Power Supply Voltage	Torque sensor malfunction	Rack and pinion power steering gear assembly	EPS warning light: Comes on	Ignition switch is turned to ON again	-
C1517	Torque Hold	Torque sensor malfunction	Rack and pinion power steering gear assembly	EPS warning light: Comes on	Ignition switch is turned to ON again	-
C1521	Short in Motor Circuit	Motor overcurrent	Rack and pinion power steering gear assembly	EPS warning light: Comes on	Ignition switch is turned to ON again	-
C1522	Power Supply Sensor	Motor current sensor malfunction	Rack and pinion power steering gear assembly	EPS warning light: Comes on	Ignition switch is turned to ON again	-
C1523	Current Deviation Excessive	Excessively large current deviation	Rack and pinion power steering gear assembly	EPS warning light: Comes on	Ignition switch is turned to ON again	-
C1528	Motor Rotation Angle Sensor	Motor rotation angle sensor malfunction	Rack and pinion power steering gear assembly	EPS warning light: Comes on	Ignition switch is turned to ON again	-
C1531	ECU Malfunction	ECU internal malfunction (CPU malfunction)	Rack and pinion power steering gear assembly	EPS warning light: Comes on	Ignition switch is turned to ON again	-
C1532	ECU Malfunction	ECU internal malfunction (Peripheral circuit malfunction)	Rack and pinion power steering gear assembly	EPS warning light: Comes on	Ignition switch is turned to ON 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	Ignition switch is turned to ON again	-
C1555	Motor Relay Welding Failure	Motor relay circuit malfunction	Rack and pinion power steering gear assembly	EPS warning light: Comes on	Ignition switch is turned to ON again	-

CAUTION / NOTICE / HINT

NOTICE:

If the rack and pinion power steering gear assembly has been replaced, perform assist map writing and torque sensor zero point calibration.

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PROCEDURE

1.	CHECK FOR DTC

(a) Clear the DTCs.

Chassis > EMPS > Clear DTCs

(b) Check for DTCs.

Chassis > EMPS > Trouble Codes

Result	Proceed to
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

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Toyota Camry (XV70): Torque Sensor1 (C1511-C1514,C1517,C1521-C1523,C1528,C1531-C1555)

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