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:

Wheels
If a wheel is bent, cracked or heavily corroded, it should be replaced. Otherwise, the tire may separate from the wheel or cause loss of handling control. - Wheel selection When replacing wheels, care should be taken to ensure that they are equivalent ...

Short in Driver Side Squib Circuit (B1800/51-B1803/51)
DESCRIPTION The driver side squib circuit consists of the center airbag sensor assembly, spiral cable and steering pad. The center airbag sensor assembly uses this circuit to deploy the airbag when deployment conditions are met. These DTCs are stored wh ...

Removal
REMOVAL PROCEDURE 1. REMOVE REAR WHEELS 2. SEPARATE REAR STABILIZER LINK ASSEMBLY LH (a) Remove the nut and separate the rear stabilizer link assembly LH from the rear stabilizer bar. Text in Illustration *1 ...