Stop Light Control Relay Inspection


  1. INSPECT STOP LIGHT CONTROL ECU ASSEMBLY

Stop Light Control Relay -- Inspection



1. INSPECT STOP LIGHT CONTROL ECU ASSEMBLY


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Lighting (Ext).Lighting System.Stop Light Control Relay Inspection

  1. Disconnect the A52 stop light control ECU assembly connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    A52-5 (STP) - Body ground
    		Brake pedal released
    		Below 1 V
    Brake pedal depressed
    		11 to 14 V
    A52-6 (+B) - Body ground
    		Always
    		11 to 14 V
    If the result is not as specified, repair or replace the wire harness or connector.
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Stop Light Control ECU Assembly)

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A52-8 (GND) - Body ground
    		Always
    		Below 1 Ω
    If the result is not as specified, repair or replace the wire harness or connector.


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Lighting (Ext).Lighting System.Stop Light Control Relay Inspection

  1. Reconnect the A52 stop light control ECU assembly connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    A52-1 (OUT) - Body ground
    		Brake pedal released
    		Below 1 V
    Brake pedal depressed
    		11 to 14 V
    If the result is not as specified, the stop light control ECU assembly may have a malfunction.
    Text in Illustration
    *a
    		Component with harness connected
    (to Stop Light Control ECU Assembly)