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Home >> Toyota >> 2008 >> RAV4 Base, 3.5 K, AWD >> Repair and Diagnosis >> Brakes >> Traction Control >> Brake Control >> Vehicle Stability Control System >> DTC C1380/64 Stop Light Control Relay Malfunction >> Inspection Procedure

Inspection Procedure

NOTE: When replacing the ABS and TRACTION actuator, perform zero point calibration (see CALIBRATION  ).
  1. CHECK STOP LIGHT (OPERATION) 
    1. Check that the light illuminates when the brake pedal is depressed, and turns off when the brake pedal is released.

      OK 

      STOP LIGHT (OPERATION)

      Condition Stop Light Condition
      Brake pedal depressed Illuminates
      Brake pedal released Turn off

    NG: Go to step  9

    OK: Go to next step. 

  2. CHECK WIRE HARNESS (SKID CONTROL ECU - BATTERY) 
    1. Disconnect the A19 ECU connector.
      2. Fig 1: Identifying A19 ECU Connector Terminals
      G05585024Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage of the wire harness side connector.

      Standard voltage 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Switch Condition Specified Condition
      A19-21 (STP2) - Body ground Brake pedal depressed 8 to 16 V
      A19-21 (STP2) - Body ground Brake pedal released Below 1.5 V

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go to next step. 

  3. CHECK WIRE HARNESS (SKID CONTROL ECU) 
    1. Disconnect the A19 ECU connector.
      2. Fig 2: Identifying A19 ECU Connector Terminals (STP2 And STP1)
      G05585037Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance of the wire harness side connector.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      A19-21 (STP2) - A19-27 (STP1) Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go to next step. 

  4. PERFORM ACTIVE TEST BY TECHSTREAM (STOP LIGHT RELAY) 
    1. Select the Active Test, generate a control command, and then check that the stop light relay operates.

      ABS / VSC / TRAC: 

      CONTROL RANGE AND DIAGNOSTIC NOTE

      Tester Display Test Part Control Range Diagnosis Note
      Stop Lamp Relay Stop light relay Relay ON / OFF Observe stop light

      OK: The stop lights illuminate or turn off. 

    NG: Go to step   6

    OK: Go to next step. 

  5. RECONFIRM DTC 
    1. Clear the DTC (see DTC CHECK / CLEAR  ).
    2. Start the engine.
    3. Drive the vehicle at a speed of 5 km/h (3 mph) or more for several seconds.
    4. Check if the same DTC is output (see DTC CHECK / CLEAR  ).

      Result 

      DTC RESULT DESCRIPTION

      Result Proceed to
      DTC is not output A
      DTC is output B

    B: END 

    A: REPLACE ABS AND TRACTION ACTUATOR ASSEMBLY 

  6. INSPECT STOP LIGHT CONTROL RELAY (Marking: BRK) 
    1. Remove the stop light control relay from the engine room No. 1 relay block.
      Fig 3: Identifying Stop Light Control Relay (Marking BRK)
      G04975259Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance of the relay.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      3 - 4 Below 1 Ω
      3 - 5 10 kΩ or higher
      3 - 4 10 kΩ or higher (when battery voltage is applied to terminals 1 and 2)
      3 - 5 Below 1 Ω (when battery voltage is applied to terminals 1 and 2)

    NG: REPLACE STOP LIGHT CONTROL RELAY 

    OK: Go to next step. 

  7. CHECK WIRE HARNESS (ENGINE ROOM NO. 1 RELAY BLOCK - SKID CONTROL ECU AND BATTERY) 
    1. Remove the stop light control relay.
      2. Fig 4: Identifying Stop Light Control Relay And A19 ECU Connector
      G05585039Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the A19 ECU connector.
    3. Measure the voltage of the wire harness side connector.

      Standard voltage 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      BRK relay terminal 5 - Body ground Always 8 to 16 V
      BRK relay terminal 2 - Body ground Ignition switch ON 8 to 16 V
    4. Measure the resistance of the wire harness side connector.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      BRK relay terminal 1 - A19-16 (STPO) Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go to next step. 

  8. RECONFIRM DTC 
    1. Clear the DTC (see DTC CHECK / CLEAR  ).
    2. Start the engine.
    3. Drive the vehicle at a speed of 5 km/h (3 mph) or more for several seconds.
    4. Check if the same DTC is output (see DTC CHECK / CLEAR  ).

      Result 

      DTC RESULT DESCRIPTION

      Result Proceed to
      DTC is not output A
      DTC is output B

    B: END 

    A: REPLACE ABS AND TRACTION ACTUATOR ASSEMBLY 

  9. CHECK WIRE HARNESS (STOP LIGHT SWITCH - BATTERY) 
    1. Disconnect the A3 switch connector.
      2. Fig 5: Identifying A3 Switch Connector Terminals
      G05585040Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage of the wire harness side connector.

      Standard voltage 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      A3-2 - Body ground 10 to 14 V

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go to next step. 

  10. INSPECT STOP LIGHT SWITCH ASSEMBLY 
    1. Remove the stop light switch connector.
      Fig 6: Identifying Stop Light Switch Assembly
      G05585026Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance of the switch.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Switch Condition Specified Condition
      1 - 2 Switch pin not pushed Below 1 Ω
      1 - 2 Switch pin pushed 10 kΩ or higher
      3 - 4 Switch pin not pushed 10 kΩ or higher
      3 - 4 Switch pin pushed Below 1 Ω

    NG: REPLACE STOP LIGHT SWITCH ASSEMBLY 

    OK: Go to next step. 

  11. CHECK WIRE HARNESS (STOP LIGHT SWITCH - STOP LIGHT CONTROL RELAY) 
    1. Disconnect the A3 switch connector.
      2. Fig 7: Identifying Stop Light Control Relay And A3 Switch Connector
      G05585042Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the stop light control relay.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      A3-1 - BRK relay terminal 4 Below 1 Ω
      A3-1 - Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go to next step. 

  12. INSPECT STOP LIGHT CONTROL RELAY (Marking: BRK) 
    1. Remove the stop light control relay from the engine room No. 1 relay block.
      Fig 8: Identifying Stop Light Control Relay (Marking BRK)
      G04975259Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance of the relay.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      3 - 4 Below 1 Ω
      3 - 5 10 kΩ or higher
      3 - 4 10 kΩ or higher (when battery voltage is applied to terminals 1 and 2)
      3 - 5 Below 1 Ω (when battery voltage is applied to terminals 1 and 2)

    NG: REPLACE STOP LIGHT CONTROL RELAY 

    OK: Go to next step. 

  13. CHECK WIRE HARNESS (STOP LIGHT AND REAR COMBINATION LIGHT - CONTROL RELAY) 
    1. Disconnect the Q1, K12 and K14 light connectors.
      2. Fig 9: Identifying K12 And K14 Light Connectors
      G05585044Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the stop light control relay.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      K14-4 - BRK relay terminal 3 Below 1 Ω
      K14-4 - Body ground 10 kΩ or higher
      K14-1 - Body ground Below 1 Ω
      K12-4 - BRK relay terminal 3 Below 1 Ω
      K12-4 - Body ground 10 kΩ or higher
      K12-1 - Body ground Below 1 Ω
      Q1-2 - BRK relay terminal 3 Below 1 Ω
      Q1-2 - Body ground 10 kΩ or higher
      Q1-1 - Body ground Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: CHECK FOR INTERMITTENT PROBLEMS 

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