C1551

POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for 2ZR-FE): C1551: IG Power Supply Voltage Malfunction

DTC C1551 - IG Power Supply Voltage Malfunction

DESCRIPTION

The power steering ECU distinguishes the ignition switch status as on (IG) or off through the IG power source circuit.






WIRING DIAGRAM





INSPECTION PROCEDURE
NOTE: If the power steering ECU has been replaced with a new one, perform the assist map writing and the torque sensor zero point calibration Programming and Relearning.

PROCEDURE

1. INSPECT FUSE (ECU-IG NO. 1)
(a) Remove the ECU-IG No. 1 fuse from the instrument panel junction block.
(b) Check the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPLACE FUSE
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (POWER STEERING ECU - BODY GROUND)




(a) Disconnect the connectors from the power steering ECU.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:





(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






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