LIGHTING SYSTEM Stop Light does not Illuminate

WIRING DIAGRAM

A01H210E03
A01H1X4E01

INSPECTION PROCEDURE

Note


  • Check if DTC B2402 is output. If output, refer to the following procedures Click here.

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Tech Tips

With the power switch off, if the rear junction block ECU is in sleep mode or is malfunctioning, the fail-safe line in the rear junction block ECU operates light illuminations.

PROCEDURE


  1. CONFIRM LIGHT POSITION


    1. Check the malfunctioning stop light.

      Result
      Result Proceed to
      Stop light (built into rear combination light) A
      Stop light (built into rear light) B
      Center stop light C
      All lights do not illuminate D
      Stop lights blink (w/ Emergency Stop Light) E

    B
    C
    D
    E
    A
  2. CHECK REAR JUNCTION BLOCK ECU (STP1, STP2 VOLTAGE)

    A01H10ME06

    1. Disconnect the S64 rear junction block ECU connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      9 (STP2) - Body ground Brake pedal depressed 11 to 14 V
      9 (STP2) - Body ground Brake pedal not depressed Below 1 V
      10 (STP1) - Body ground Brake pedal depressed 11 to 14 V
      10 (STP1) - Body ground Brake pedal not depressed Below 1 V

    NG
    OK
  3. CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT - REAR JUNCTION BLOCK ECU AND BODY GROUND)

    A01GWC1E11

    1. Disconnect the S64 rear junction block ECU connector.

    2. Disconnect the S51*1 or S52*2 rear combination light connector.


      • *1: for LH

      • *2: for RH

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      for LH
      Tester Connection Condition Specified Condition
      S64-9 (STP2) - S51-1 (STP) Always Below 1 Ω
      S51-4 (E) - Body ground Always Below 1 Ω
      S64-9 (STP2) - Body ground Always 10 kΩ or higher
      for RH
      Tester Connection Condition Specified Condition
      S64-10 (STP1) - S52-1 (STP) Always Below 1 Ω
      S52-4 (E) - Body ground Always Below 1 Ω
      S64-10 (STP1) - Body ground Always 10 kΩ or higher

    NG
    OK
  4. INSPECT REAR COMBINATION LIGHT SOCKET AND WIRE SUB-ASSEMBLY

    A01GYCUE01

    1. Remove the rear combination light socket and wire Click here.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (STP) - 2 Always Below 1 Ω
      4 (E) - 1 Always Below 1 Ω

    NG
    OK
  5. CHECK REAR JUNCTION BLOCK ECU (STP3 VOLTAGE)

    A01GYF8E19

    1. Disconnect the S63 rear junction block ECU connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      4 (STP3) - Body ground Brake pedal depressed 11 to 14 V
      4 (STP3) - Body ground Brake pedal not depressed Below 1 V

    NG
    OK
  6. CHECK HARNESS AND CONNECTOR (REAR LIGHT - REAR JUNCTION BLOCK ECU AND BODY GROUND)

    A01GX2UE01

    1. Disconnect the S63 rear junction block ECU connector.

    2. Disconnect the S33*1 or S41*2 rear light connector.


      • *1: for LH

      • *2: for RH

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      for LH
      Tester Connection Condition Specified Condition
      S63-4 (STP3) - S33-1 (B) Always Below 1 Ω
      S33-4 (E) - Body ground Always Below 1 Ω
      S63-4 (STP3) - Body ground Always 10 kΩ or higher
      for RH
      Tester Connection Condition Specified Condition
      S63-4 (STP3) - S41-1 (B) Always Below 1 Ω
      S41-4 (E) - Body ground Always Below 1 Ω
      S63-4 (STP3) - Body ground Always 10 kΩ or higher

    NG
    OK
  7. INSPECT REAR LIGHT SOCKET AND WIRE

    A01GYCUE02

    1. Remove the rear light socket and wire Click here.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (B) - 1 Always Below 1 Ω
      4 (E) - 4 Always Below 1 Ω

    NG
    OK
  8. CHECK REAR JUNCTION BLOCK ECU (STP4 VOLTAGE)

    A01H1IRE07

    1. Remove the S62 rear junction block ECU with its connector still connected.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      6 (STP4) - Body ground Brake pedal depressed 11 to 14 V
      6 (STP4) - Body ground Brake pedal not depressed Below 1 V

    NG
    OK
  9. CHECK HARNESS AND CONNECTOR (CENTER STOP LIGHT - REAR JUNCTION BLOCK ECU AND BODY GROUND)

    A01GZ5LE06

    1. Disconnect the S62 rear junction block ECU connector.

    2. Disconnect the S20 center stop light connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      S62-6 (STP4) - S20-1 Always Below 1 Ω
      S20-2 - Body ground Always Below 1 Ω
      S62-6 (STP4) - Body ground Always 10 kΩ or higher

    NG
    OK
  10. PERFORM ACTIVE TEST USING GTS (STOP LIGHT)


    1. Using the GTS, perform the Active Test Click here.

      Body No. 4
      Tester Display Test Part Control Range
      Stop Light Stop light operation OFF-ON
      High Mount Stop Light High mount stop light operation OFF-ON
      OK
      Stop light condition is switched by Active Test.

    NG
    OK
  11. READ VALUE USING GTS (STOP LIGHT SWITCH)


    1. Using the GTS, read the Data List Click here.

      Body No. 4
      Tester Display Measurement Item/Display Normal Condition Diagnostic Note
      Stop Light Switch Stop light switch/ON or OFF

      ON: Brake pedal depressed

      OFF: Brake pedal released

      -
      OK
      Condition sign can be displayed.

    NG
    OK
  12. CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH - BATTERY AND BODY GROUND)

    A01GXS6E03

    1. Disconnect the A95 stop light switch connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      A95-1 (B) - Body ground Always 11 to 14 V
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      A95-3 (GND) - Body ground Always Below 1 Ω

    NG
    OK
  13. CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH - REAR JUNCTION BLOCK ECU)

    A01H1FNE04

    1. Disconnect the S62 rear junction block ECU connector.

    2. Disconnect the A95 stop light switch connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      A95-2 (L) - S62-16 (STOP) Always Below 1 Ω
      A95-2 (L) - Body ground Always 10 kΩ or higher

    NG
    OK
  14. CHECK STOP LIGHT SWITCH


    1. A01GW8QE05

      Disconnect the S62 rear junction block ECU connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      A95-2 (L) - Body ground Brake pedal depressed 11 to 14 V
      A95-2 (L) - Body ground Brake pedal released Below 1 V

    NG
    OK
  15. CHECK HARNESS AND CONNECTOR (REAR JUNCTION BLOCK ECU - BATTERY)


    1. A01GYWIE11

      Disconnect the LH rear junction block ECU connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      LH-1 - Body ground Always 11 to 14 V

    NG
    OK
  16. CHECK DTC (BRAKE CONTROL SYSTEM)


    1. Clear the DTC Click here.

    2. Check for DTC Click here.

      OK
      DTCs output does not occur

    NG
    OK
  17. CHECK STOP LIGHT


    1. With the skid control ECU connector disconnected, check the illumination of the stop lights when depressing the brake pedal.

      OK
      Stop lights operate normally when the brake pedal is depressed.
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    B
    C
    A