C15B4

STEERING COLUMN: VARIABLE GEAR RATIO STEERING SYSTEM: C15B4/71: ECU Malfunction

DTC C15B4/71 - ECU Malfunction

DESCRIPTION

If the steering control ECU detects an internal malfunction, it will turn the master warning light on, store DTCs C15B4/71, and stop VGRS operation.






INSPECTION PROCEDURE

PROCEDURE

1. CHECK MASTER WARNING LIGHT
(a) Check the conditions under which the master warning light comes on.
Result:
The engine stalled, battery voltage is too low, or the steering control ECU connector is disconnected.
NG -- REPLACE STEERING CONTROL ECU
OK -- Continue to next step.
2. CLEAR DTC
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch ON (IG) and turn the Techstream on.
(c) Clear the DTCs Variable Gear Ratio Steering System.
NEXT -- Continue to next step.
3. PERFORM VGRS SYSTEM CALIBRATION
(a) Perform VGRS system calibration Variable Gear Ratio Steering System.
NEXT -- Continue to next step.
4. CHECK DTC
(a) Turn the power switch ON (IG).
(b) Check for DTCs Variable Gear Ratio Steering System.
Result:






NG -- REPLACE STEERING CONTROL ECU
OK -- END