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Inspection Procedure

NOTE: When replacing the brake actuator assembly, perform zero point calibration (See CALIBRATION  ).
  1. INSPECT STOP FUSE 
    1. Remove the STOP fuse from the main body ECU (driver side junction block).
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Condition Specified Condition
      STOP (10 A) fuse Always Below 1 Ω

      NG: REPLACE STOP FUSE 

      Fig 1: Identifying STOP Fuse
      G06013858Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

  2. CHECK STOP LIGHT OPERATION 
    1. Install the STOP fuse.
    2. Check that the stop lights come on when the brake pedal is depressed, and go off when the brake pedal is released.

      OK 

      STOP LIGHTS ILLUMINATION CONDITION

      Condition Illumination Condition
      Brake pedal depressed ON
      Brake pedal released OFF

      NG: Go to step  7

      OK: Go to next step 

  3. INSPECT SKID CONTROL ECU (STP TERMINAL) 
    1. Disconnect the skid control ECU connector.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      VOLTAGE SPECIFIED CONDITIONS

      Tester Connection Switch Condition Specified Condition
      A38-2 (STP) - Body ground Stop light switch ON (Brake pedal depressed) 8 to 14 V
      A38-2 (STP) - Body ground Stop light switch OFF (Brake pedal released) Below 1.5 V

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

      Fig 2: Identifying Terminal STP Of A38 Connector
      G06035027Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

  4. INSPECT SKID CONTROL ECU (IG1 TERMINAL) 
    1. Turn the ignition switch to ON.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      VOLTAGE SPECIFIED CONDITIONS

      Tester Connection Switch Condition Specified Condition
      A38-34 (IG1) - Body ground Ignition switch ON 11 to 14 V

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT) 

      Fig 3: Identifying Terminal IG1 Of A38 Connector
      G06035024Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

  5. INSPECT SKID CONTROL ECU (GND1 TERMINAL) 
    1. Turn the ignition switch off.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Condition Specified Condition
      A38-1 (GND1) - Body ground Always Below 1 Ω

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (GND1 CIRCUIT) 

      Fig 4: Identifying Terminal GND1 Of A38 Connector
      G06035009Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

  6. RECONFIRM DTC 
    1. Reconnect 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 recorded (See DTC CHECK / CLEAR  ).

      Result 

      DTC OUTPUT RESULT

      Result Proceed to
      DTC (C1249/49) is not output A
      DTC (C1249/49) 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 DIAGNOSIS SYSTEM  )

  7. INSPECT STOP LIGHT SWITCH (POWER SOURCE TERMINAL) 
    1. Disconnect the stop light switch connector.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      VOLTAGE SPECIFIED CONDITIONS

      Tester Connection Condition Specified Condition
      A1-2 - Body ground Always 11 to 14 V

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

      Fig 5: Identifying Stop Light Switch Connector Terminals
      G06013862Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

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

      Standard Resistance 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Switch Condition Specified Condition
      1 - 2 Switch pin free Below 1 Ω
      1 - 2 Switch pin pushed in 10 kΩ or higher

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

      Fig 6: Inspecting Stop Light Switch
      G06013863Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

  9. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - STOP LIGHT SWITCH) 
    1. Disconnect the skid control ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE SPECIFIED CONDITIONS

      Tester Connection Condition Specified Condition
      A38-2 (STP) - A1-1 Always Below 1 Ω

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      Fig 7: Identifying Skid Control ECU And Stop Light Switch Connector Terminals
      G06035036Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

  10. RECONFIRM DTC 
    1. Reconnect the skid control ECU connector and the stop light switch 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 recorded (See DTC CHECK / CLEAR  ).

      Result 

      DTC OUTPUT RESULT

      Result Proceed to
      DTC (C1249/49) is not output A
      DTC (C1249/49) 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: INSPECT LIGHTING SYSTEM (STOP LIGHT CIRCUIT)  (See OPERATION CHECK )

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