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DTC C15C3/75 Brake System Control Module Malfunction: Description

WARNING: This page is about a different car, the 2006 Lexus GS 430 and 2006 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.

The steering control ECU detects a vehicle speed error by receiving an error signal from the skid control ECU via CAN communication.

If the steering control ECU detects this error signal, it will turn the master warning light on, store this DTC, and stop VGRS operation.

DTC DETECTING CONDITION CHART

DTC No. DTC Detecting Condition Trouble Area
C15C3/75 The steering control ECU receives a vehicle speed error signal via CAN communication.
  • Skid control ECU
  • CAN communication system
  • Steering control ECU
  1. CHECK DTC 
    1. Check for DTCs in the skid control ECU (See DATA LIST / ACTIVE TEST ).

      OK: 

      DTC is not output. 

    NG : REPAIR CIRCUIT INDICATED BY DTC OUTPUT 

    OK : GO TO NEXT STEP 

  2. CHECK DTC 
    1. Check for DTCs in the CAN communication system (See GATEWAY ECU COMMUNICATION STOP MODE ).

      Result 

      RESULT SPECIFICATION

      Result Proceed to
      DTC is not output. A
      DTC is output. B

    NG : REPAIR CIRCUIT INDICATED BY DTC OUTPUT 

    OK : REPLACE STEERING CONTROL ECU