C1551

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

DESCRIPTION

If the power steering ECU assembly determines that there is a malfunction in the IG circuit inside the ECU, it outputs this DTC. This DTC is not output when there is an open circuit in the wire harness connected to terminal IG or a battery voltage drop.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (POWER STEERING ECU ASSEMBLY - BATTERY)

(a) Disconnect the A31 connector from the power steering ECU assembly.





(b) Measure the voltage according value(s) in the table below.

Standard voltage:





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

2. CHECK HARNESS AND CONNECTOR (POWER STEERING ECU ASSEMBLY - BODY GROUND)

(a) Measure the resistance according value(s) in the table below.





Standard resistance:





NOTICE:
If replacing the power steering ECU assembly, initialize the rotation angle sensor and calibrate the torque sensor zero point Programming and Relearning.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE POWER STEERING ECU ASSEMBLY