C1554

POWER ASSIST SYSTEMS: POWER STEERING SYSTEM: C1552/22, C1554/23: PIG Power Supply Voltage Malfunction
C1554/23 - Power Supply Relay Failure

DESCRIPTION

When a problem occurs in the system, the power source relay circuit and the motor relay circuit are shut off to stop the power assist. The ECU must be replaced when there is a problem with the relays because each relay is built into the ECU.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* When the steering column assembly is replaced, perform the assist map writing Programming and Relearning.
* Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (STEERING COLUMN ASSEMBLY - BATTERY AND BODY GROUND)

(a) Disconnect the connector from the steering column assembly (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:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE STEERING COLUMN ASSEMBLY Removal