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Home >> Toyota >> 2008 >> FJ Cruiser RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 90 (Brakes - Abs) >> Vehicle Stability Control System >> DTC C1380/64 Stop Light Control Relay Malfunction >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
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 

      TESTER CONNECTION SPECIFIED CONDITION

      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. Measure the voltage of the wire harness side connector.
      Fig 1: Identifying A19 ECU Harness Connector Terminals (STP2)
      G04489418Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage 

      TESTER CONNECTION 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. Measure the resistance of the wire harness side connector.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      A19-21 (STP2) - A19-27 (STP1) Below 1 Ω
      Fig 2: Identifying A19 ECU Harness Connector Terminals (STP1 & 2)
      G04489419Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: GO TO NEXT STEP. 

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

      Skid control ECU 

      ITEM REFERENCE

      Item Test Details Diagnosis Note
      STP LAMP RELAY Turn stop light 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 

      RESULT PROCEED

      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.
    2. Measure the resistance of the relay.
      Fig 3: Identifying Relay Test Terminals
      G04435556Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance 

      TESTER CONNECTION 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. Disconnect the A19 ECU connector.
    3. Measure the voltage of the wire harness side connector.

      Standard voltage 

      TESTER CONNECTION 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 SPECIFIED CONDITION

      Tester Connection Specified Condition
      BRK relay terminal 1 - A19-16 (STPO) Below 1 Ω
      Fig 4: Identifying Stop Light Control Relay At Engine Room No. 1 Relay Block
      G04489421Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    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 

      RESULT PROCEED

      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. Measure the voltage of the wire harness side connector.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      A3-2 - Body ground 10 to 14 V
      Fig 5: Identifying A3 Switch Harness Connector
      G04489422Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    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.
      2. Fig 6: Identifying Stop Light Switch Terminals
      G04489423Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance of the switch.

      Standard resistance 

      TESTER CONNECTION 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. Remove the stop light control relay.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      A3-1 - BKR relay terminal 4 Below 1 Ω
      A3-1 - Body ground 10 kΩ or higher
      Fig 7: Identifying Stop Light Control Relay & A3 Switch Harness Connector
      G04489424Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    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.
    2. Measure the resistance of the relay.
      Fig 8: Identifying Relay Test Terminals
      G04435556Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance 

      TESTER CONNECTION 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. Remove the stop light control relay.
    3. Measure the resistance of the wire harness side connectors.
      Fig 9: Identifying Q1, K12, K14 Light Connectors & Stop Light Control Relay
      G04489426Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

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