Dtc C1522 Motor Circuit Malfunction

Steering. Corolla. Zre142 Aze141
Power Assist Systems. Corolla. Zre142 Aze141

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING TECHSTREAM (MOTOR VOLTAGE)

DTC C1522 Motor Circuit Malfunction

DTC C1523 Motor Circuit Malfunction

DTC C1524 Motor Circuit Malfunction

DTC C1555 Motor Relay Welding Failure


DESCRIPTION

The power steering ECU supplies the current to the power steering motor through the motor circuit.

DTC No.
DTC Detection Condition
Trouble Area
C1522
Motor current sensor malfunction
  1. Steering column assembly
  2. Power steering ECU
C1523
Excessively large current deviation
C1524
Short (or open) in motor circuit or abnormal voltage or current in motor circuit
C1555
Motor relay circuit malfunction

WIRING DIAGRAM


Corolla. Zre142 Aze141.Power Assist Systems.Power Steering System (For 2Az-Fe). Dtc C1522 Motor Circuit Malfunction


INSPECTION PROCEDURE

NOTICE:
If the steering column assembly or power steering ECU has been replaced, perform the rotation angle sensor initialization and torque sensor zero point calibration (COROLLA_ZRE142 RM00000275305CX.html).
1.READ VALUE USING TECHSTREAM (MOTOR VOLTAGE)

  1. Turn the ignition switch off.

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch on (IG).

  1. Turn the Techstream on.

  1. Enter the following menus: Chassis / EMPS / Data List.

  1. Select the items "Motor Terminal Volt(U)", "Motor Terminal Volt(V)" and "Motor Terminal Volt(W)" in the Data List and read the value displayed on the Techstream.

    EMPS
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Motor Terminal Volt(U)
    		Motor terminal voltage (U phase)/
    Min.: 0 V
    Max.: 46.667 V
    		During steering operation, value changes within 4 to 35 V range
    		Steering wheel is turned
    Motor Terminal Volt(V)
    		Motor terminal voltage (V phase)/
    Min.: 0 V
    Max.: 46.667 V
    		During steering operation, value changes within 4 to 35 V range
    		Steering wheel is turned
    Motor Terminal Volt(W)
    		Motor terminal voltage (W phase)/
    Min.: 0 V
    Max.: 46.667 V
    		During steering operation, value changes within 4 to 35 V range
    		Steering wheel is turned
    Result:
    Result
    		Proceed to
    During steering operation, value changes within 4 to 35 V range
    		A
    During steering operation, voltage is not generated
    		B


B
REPLACE STEERING COLUMN ASSEMBLY (COROLLA_ZRE142 RM0000029SZ02TX.html)
A

REPLACE POWER STEERING ECU (COROLLA_ZRE142 RM000002XN605AX.html)