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Home >> Toyota >> 2009 >> RAV4 Base, 2.5 F, AWD >> Repair and Diagnosis >> Brakes >> Traction Control >> Brake Control >> Vehicle Stability Control System >> DTC C1425 Open in Stop Light Switch Circuit >> Inspection Procedure
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Inspection Procedure

NOTE:
  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.
  • When replacing the brake actuator assembly, perform zero point calibration (See CALIBRATION ).
  1. CHECK STOP LIGHT OPERATION 
    1. Check that the stop lights come on when the brake pedal is depressed, and go off when the brake pedal is released.

    OK 

    ILLUMINATION CONDITION CHART

    Condition Illumination Condition
    Brake pedal depressed. ON
    Brake pedal released. OFF

    NG : Go to step  4

    OK : Go to Next Step 

  2. READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Select the Data List mode on the Techstream (See DATA LIST / ACTIVE TEST ).

      ABS/VSC/TRAC: 

      ABS/VSC/TRAC REFERENCE CHART

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Stop Light SW Stop light switch / ON or OFF ON: Brake pedal depressed
      OFF: Brake pedal released      		 -
    4. Check that the stop light switch display observed on the Techstream changes according to brake pedal operation.

    OK: The Techstream displays ON or OFF according to brake pedal operation. 

    NG : Go to step  8

    OK : Go to Next Step 

  3. RECONFIRM DTC 
    1. Turn the ignition switch off.
    2. Clear the DTCs (See DTC CHECK / CLEAR ).
    3. Start the engine.
    4. Depress the brake pedal several times to test the stop light circuit.
    5. Check if the same DTC is output (See DTC CHECK / CLEAR ).

    Result 

    RESULT CHART

    Result Proceed to
    DTC (C1425) is not output. A
    DTC (C1425) is output. B

    HINT:

    If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (See PROBLEM SYMPTOMS TABLE ).

    B : REPLACE BRAKE ACTUATOR ASSEMBLY  (See REMOVAL )

    A : CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION)  (See HOW TO PROCEED WITH TROUBLESHOOTING )

  4. INSPECT STOP LIGHT SWITCH (POWER SOURCE TERMINAL) 
    1. Make sure that there is no looseness in the locking part and connecting part of the connectors.
    2. Disconnect the stop light switch connector.
    3. Measure the voltage according to the value(s) in the table below.

    Standard Voltage 

    TESTER CONNECTION SPECIFIED CONDITION CHART

    Tester Connection Condition Specified Condition
    A3-2 - Body ground Always 11 to 14 V

    NG : REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

    Fig 1: Identifying Stop Light Switch Connector Terminals
    G06003330Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : Go to Next Step 

  5. INSPECT STOP LIGHT SWITCH 
    1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance 

    TESTER CONNECTION SPECIFIED CONDITION CHART

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

    NG : REPLACE STOP LIGHT SWITCH  (See STOP LIGHT SWITCH )

    Fig 2: Inspecting Stop Light Switch
    G06003331Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : Go to Next Step 

  6. INSPECT SKID CONTROL ECU (STP2 TERMINAL) 
    1. Connect the stop light switch connector.
    2. Install the stop light control relay (BRK).
    3. Turn the ignition switch off.
    4. Make sure that there is no looseness in the locking part and connecting part of the connector.
    5. Disconnect the skid control ECU connector.
    6. Measure the voltage according to the value(s) in the table below.

    Standard Voltage 

    TESTER CONNECTION SPECIFIED CONDITION CHART

    Tester Connection Condition Specified Condition
    A19-22 (STP2) - Body ground Brake pedal depressed ↔ released Output voltage changes

    NG : REPAIR OR REPLACE HARNESS OR CONNECTOR (STP2 CIRCUIT) 

    Fig 3: Identifying A19 Skid Control ECU Connector Terminals
    G06003300Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : Go to Next Step 

  7. RECONFIRM DTC 
    1. Connect the skid control ECU connector.
    2. Clear the DTCs (See DTC CHECK / CLEAR ).
    3. Start the engine.
    4. Depress the brake pedal several times to test the stop light circuit.
    5. Check if the same DTC is output (See DTC CHECK / CLEAR ).

    Result 

    RESULT CHART

    Result Proceed to
    DTC (C1425) is not output. A
    DTC (C1425) is output. B

    HINT:

    If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (See PROBLEM SYMPTOMS TABLE ).

    B : REPLACE BRAKE ACTUATOR ASSEMBLY  (See REMOVAL )

    A : CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION)  (See HOW TO PROCEED WITH TROUBLESHOOTING )

  8. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - ENGINE ROOM NO. 1 RELAY BLOCK) 
    1. Turn the ignition switch off.
    2. Remove the stop light control relay (BRK).
    3. Make sure that there is no looseness in the locking part and connecting part of the connectors.
    4. Disconnect the skid control ECU connector.
    5. Measure the resistance according to the value(s) in the table below.

    Standard Resistance 

    TESTER CONNECTION SPECIFIED CONDITION CHART

    Tester Connection Condition Specified Condition
    A19-2 (STP) - Stop light control relay (BRK) terminal 3 Always Below 1 Ω

    HINT:

    If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (See PROBLEM SYMPTOMS TABLE ).

    NG : REPAIR OR REPLACE HARNESS OR CONNECTOR (STP CIRCUIT) 

    Fig 4: Identifying Skid Control ECU And Engine Room No. 1 Relay Block Connector Terminals
    G06003333Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : REPLACE BRAKE ACTUATOR ASSEMBLY  (See REMOVAL )

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