Power Assist Systems. Dtc C1553 Pig Power Supply Overvoltage

Steering. Corolla. Zre142 Aze141

Power Assist Systems. Corolla. Zre142 Aze141

DTC C1553 PIG Power Supply Overvoltage

DESCRIPTION

If the power steering ECU determines that the motor power source voltage and the IG voltage are not within the specified range, it stops the power assist as a fail-safe function.

DTC No.	DTC Detection Condition	Trouble Area
C1553	PIG power source overvoltage IG power source overvoltage	IG and PIG power source circuits Power steering ECU

WIRING DIAGRAM

Corolla. Zre142 Aze141.Power Assist Systems.Power Steering System (For 2Az-Fe).
Dtc
C1553 Pig Power Supply Overvoltage

INSPECTION PROCEDURE

NOTICE:

If the power steering ECU has been replaced with a new one, perform the assist map writing and the torque sensor zero point calibration (COROLLA_ZRE142 RM00000275305DX.html).

1.CHECK HARNESS AND CONNECTOR (IG, PIG)

Disconnect the connectors from the power steering ECU.

Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
Switch Condition
Specified Condition
A75-1 (PIG) - A75-2 (PGND)
Always
11 to 14 V
E32-6 (IG) - A75-2 (PGND)
Ignition switch on (IG)
11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE POWER STEERING ECU (COROLLA_ZRE142 RM000002XN605BX.html)

Tester Connection	Switch Condition	Specified Condition
A75-1 (PIG) - A75-2 (PGND)	Always	11 to 14 V
E32-6 (IG) - A75-2 (PGND)	Ignition switch on (IG)	11 to 14 V