VEHICLE STABILITY CONTROL SYSTEM(for Vacuum Brake Booster), Diagnostic DTC:C1428

DTC Code DTC Name
C1428 Motor Circuit Malfunction

DESCRIPTION

DTC Code DTC Detection Condition Trouble Area
C1428 With the motor relay off and the motor fail-safe relay on, an open in the motor circuit continues for 2 seconds or more. Brake actuator assembly (Motor circuit)

WIRING DIAGRAM

Refer to DTCs C1361, C146C and C146D Click here.

CAUTION / NOTICE / HINT

Note

When replacing the skid control ECU (brake actuator assembly), perform zero point calibration Click here.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (GND2 TERMINAL)


    1. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      A6-13 (GND2) - Body ground Always Below 1 Ω

    OK

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR