Dtc C15B4/71 Ecu Malfunction

Steering. Lexus Gs430, Gs300. Uzs190 Grs190
Steering Column. Lexus Gs430, Gs300. Uzs190 Grs190

DESCRIPTION

INSPECTION PROCEDURE

CHECK MASTER WARNING LIGHT

CLEAR DTC

PERFORM VGRS SYSTEM CALIBRATION

CHECK DTC

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.

DTC No.
DTC Detecting Condition
Trouble Area
C15B4/71
The steering control ECU detects an internal malfunction.
  1. Steering control ECU

INSPECTION PROCEDURE

1.CHECK MASTER WARNING LIGHT

  1. 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


2.CLEAR DTC

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG) and turn the intelligent tester on.

  1. Clear the DTCs (Click here).


NEXT


3.PERFORM VGRS SYSTEM CALIBRATION

  1. Perform VGRS system calibration (Click here).


NEXT


4.CHECK DTC

  1. Turn the engine switch on (IG).

  1. Check for DTCs (Click here).

    OK:
    DTC is not output.


NG
REPLACE STEERING CONTROL ECU
OK

END