Toyota Venza: Motor Circuit Malfunction (C1521,C1531-C1534,C1554)

Toyota Venza Service Manual / Power Assist Systems / Power Steering System / Motor Circuit Malfunction (C1521,C1531-C1534,C1554)

DESCRIPTION

If the power steering ECU detects these DTCs, it will shut off the motor relay circuit (built into the power steering ECU) and stop power assist. However, power assist continues if DTC C1533 or C1534 is stored.

DTC No.	DTC Detection Condition	Trouble Area
C1521	Motor overcurrent	Power steering ECU
C1531	ECU internal malfunction (CPU malfunction)	Power steering ECU
C1532	ECU internal malfunction (Peripheral circuit malfunction)	Power steering ECU
C1533	ECU internal malfunction (Substrate temperature sensor malfunction)	Power steering ECU
C1534	ECU internal malfunction (EEPROM error)	Power steering ECU
C1554	Power source relay circuit malfunction	Power steering ECU

CAUTION / NOTICE / HINT

NOTICE:

If the power steering ECU has been replaced with a new one, perform the rotation angle sensor initialization and torque sensor zero point calibration (See page ).

PROCEDURE

1.	CHECK FOR DTC

(a) Clear the DTCs (See page ).

(b) Check for DTCs (See page ).

OK:

DTC is not output.

CHECK INTERMITTENT PROBLEMS

REPLACE POWER STEERING ECU

Torque Sensor Zero Point Adjustment Incomplete (C1516,C1526)

DESCRIPTION These DTCs do not indicate a malfunction. The power steering ECU stores these DTCs when it determines that the rotation angle sensor value initialization and torque sensor zero point ...

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 stee ...

Other materials about Toyota Venza:

Adjustment
ADJUSTMENT PROCEDURE 1. ADJUST STEERING WHEEL OFF CENTER (a) Inspect steering wheel off center. (1) Apply masking tape on the top center of the steering wheel and steering column upper cover. Text in Illustration *1 ...

Rear Left Sensor Malfunction (C1AE6)
DESCRIPTION The No. 1 ultrasonic sensor (rear left sensor) is installed on the rear bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (rear left sensor). If the No. 1 ultrasonic sensor (rear left sensor) has an o ...

Height Control Sensor
Components COMPONENTS ILLUSTRATION ILLUSTRATION Removal REMOVAL PROCEDURE 1. REMOVE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY (for 2WD) (a) Disconnect the connector. (b) Remove the 3 nuts ...