STOP LIGHT CONTROL RELAY ON-VEHICLE INSPECTION

PROCEDURE

  1. INSPECT STOP LIGHT CONTROL ECU ASSEMBLY

    1. E142629C09

      *a

      Front view of wire harness connector

      (to Stop Light Control ECU Assembly)

      Disconnect the A186 stop light control ECU assembly connector.

    2. Measure the voltage on the wire harness side connector according to the value(s) in the table below.

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      A186-7 (STP) - Body ground

      Brake pedal not depressed

      Below 1 V

      Brake pedal depressed

      11 to 14 V

      A186-6 (+B) - Body ground

      Always

      11 to 14 V

      If the result is not as specified, repair or replace the wire harness or connector.

    3. Measure the resistance on the wire harness side connector according to the value(s) in the table below.

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      A186-4 (GND) - Body ground

      Always

      Below 1 Ω

      If the result is not as specified, repair or replace the wire harness or connector.

    4. E150985C03

      *a

      Component with harness connected

      (Stop Light Control ECU Assembly)

      Reconnect the A186 stop light control ECU assembly connector.

    5. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      A186-8 (OUT) - Body ground

      Brake pedal not depressed

      Below 1 V

      Brake pedal depressed

      11 to 14 V

      If the result is not as specified, replace the stop light control ECU assembly.