STOP LIGHT CONTROL RELAY(for LHD) ON-VEHICLE INSPECTION

PROCEDURE


  1. INSPECT STOP LIGHT CONTROL ECU ASSEMBLY


    1. A01HINCC12
      *a

      Front view of wire harness connector

      (to Stop Light Control ECU Assembly)

      Disconnect the stop light control ECU assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A3-4 (ESS1) - A3-8 (GND) Engine switch on (IG) 11 to 14 V
      A3-6 (+B) - A3-8 (GND) Engine switch off 11 to 14 V
      A3-9 (ACC) - A3-8 (GND) Engine switch on (IG) 11 to 14 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      A3-8 (GND) - Body ground Always Below 1 Ω

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

    3. Reconnect the stop light control ECU assembly connector.

    4. B008HTHC10
      *a

      Component with harness connected

      (Stop Light Control ECU Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A3-1 (OUT) - A3-8 (GND) Brake pedal not depressed → pressed Below 0 to 1.5 V → 7.5 to 14 V
      A3-5 (STP) - A3-8 (GND) Brake pedal not depressed → pressed Below 0 to 1.5 V → 7.5 to 14 V

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