C1551

POWER STEERING: ELECTRONIC POWER STEERING SYSTEM: C1551: IG Power Supply Voltage Malfunction

DTC C1551 - IG Power Supply Voltage Malfunction

DESCRIPTION

The power steering ECU distinguishes on / off status of the power switch through this circuit.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (ECU-IG)
(a) Remove the ECU-IG fuse from the driver side junction block.
(b) Measure the resistance of the fuse.
Standard resistance:
Below 1 Ohms
NG -- INSPECT FOR SHORT IN ALL COMPONENTS CONNECTED TO FUSE AND REPAIR OR REPLACE THEM IF NEEDED, AND REPLACE FUSE
OK -- Continue to next step.

2. CHECK WIRE HARNESS (POWER STEERING ECU - BODY GROUND)




(a) Disconnect the P8 power steering ECU connector.
(b) Turn the power switch ON (IG).
(c) Measure the voltage of the wire harness side connector.
Standard voltage:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.

3. CHECK WIRE HARNESS (POWER STEERING ECU - BODY GROUND)




(a) Turn the power switch OFF.
(b) Disconnect the P7 power steering ECU connector.
(c) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- REPLACE POWER STEERING ECU