STOP LIGHT CONTROL RELAY > INSPECTION

for Preparation Click here



1. INSPECT STOP LIGHT CONTROL ECU ASSEMBLY (w/ Emergency Brake Signal)


    E173014E06

  1. Disconnect the A27 stop light control ECU assembly connector.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    A27-5 (STP) - Body ground
    		Power switch off and Brake pedal released
    		Below 1 V
    Power switch off and Brake pedal depressed
    		11 to 14 V
    A27-6 (+B) - Body ground
    		Power switch off
    		11 to 14 V

    Text in Illustration 
    *a
    		Front view of wire harness connector
    (to Stop Light Control ECU Assembly)
    If the result is not as specified, repair or replace the wire harness or connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A27-8 (GND) - Body ground
    		Always
    		Below 1 Ω

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



    E173013E15

  1. Reconnect the A27 stop light control ECU assembly connector.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    A27-1 (OUT) - Body ground
    		Power switch off and Brake pedal released
    		Below 1 V
    Power switch off and Brake pedal depressed
    		11 to 14 V
    A27-4 (ESS1) - Body ground
    		Power switch off
    		11 to 14 V
    A27-9 (ACC) - Body ground
    		Power switch on (ACC)
    		11 to 14 V

    Text in Illustration 
    *a
    		Component without harness connected
    (Stop Light Control ECU Assembly)
    If the result is not as specified, the stop light control ECU assembly may have a malfunction.



2. INSPECT STOP LIGHT CONTROL ECU ASSEMBLY (w/o Emergency Brake Signal)


    E173014E06

  1. Disconnect the A27 stop light control ECU assembly connector.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    A27-5 (STP) - Body ground
    		Power switch off and Brake pedal released
    		Below 1 V
    Power switch off and Brake pedal depressed
    		11 to 14 V
    A27-6 (+B) - Body ground
    		Power switch off
    		11 to 14 V

    Text in Illustration 
    *a
    		Front view of wire harness connector
    (to Stop Light Control ECU Assembly)
    If the result is not as specified, repair or replace the wire harness or connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A27-8 (GND) - Body ground
    		Always
    		Below 1 Ω

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



    E173013E14

  1. Reconnect the A27 stop light control ECU assembly connector.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    A27-1 (OUT) - Body ground
    		Power switch off and Brake pedal released
    		Below 1 V
    Power switch off and Brake pedal depressed
    		11 to 14 V
    A27-9 (ACC) - Body ground
    		Power switch off
    		11 to 14 V

    Text in Illustration 
    *a
    		Component without harness connected
    (Stop Light Control ECU Assembly)
    If the result is not as specified, the stop light control ECU assembly may have a malfunction.