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Stop Light Control Relay: Inspection

  1. INSPECT STOP LIGHT CONTROL RELAY 
    1. Disconnect the J89 stop light control relay connector.
    2. Measure the voltage according to the value (s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      J89-2 (E2B) - Body ground Brake pedal released Below 1 V
      Brake pedal depressed 11 to 14 V
      J89-6 (E2A) - Body ground Always 11 to 14 V

      If the result is not as specified, there is a malfunction on the wire harness side.

    3. Measure the resistance according to the value (s) in the table below.
      Fig 1: Identifying Stop Light Control Relay
      G05832369Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      J89-4 (E2D) - Body ground Always Below 1 Ω

      If the result is not as specified, there is a malfunction on the wire harness side.

    4. Reconnect the J89 stop light control relay connector.
    5. Measure the voltage according to the value (s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      J89-8 (E2C) - Body ground Brake pedal released Below 1 V
      Brake pedal depressed 11 to 14 V

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

      Fig 2: Identifying J89 Stop Light Control Relay Connector
      G05832370Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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