C15C8

STEERING COLUMN: VARIABLE GEAR RATIO STEERING SYSTEM: C15C7/78,C15C8/79: DC Motor Power Source Voltage Malfunction


DESCRIPTION

The steering control ECU monitors PIG (motor power source voltage) and detects a malfunction in the power supply relay (located inside the steering control ECU).

If the steering control ECU detects a malfunction, it will turn on the master warning light, store these DTCs, and stop VGRS operation.





WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
The fault may be intermittent. Check the harnesses and connectors thoroughly and retest.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

(a) Record and clear the DTCs Variable Gear Ratio Steering System.

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





Standard resistance:





Standard voltage:





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

2. RECONFIRM DTC OUTPUT

(a) Check for DTCs Variable Gear Ratio Steering System.

Result





NG -- REPLACE STEERING CONTROL ECU Removal

OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting