PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:C1A4B

DTC Code DTC Name
C1A4B Stop Light Relay Circuit

DESCRIPTION


DTC No. Detection Item DTC Detection Condition Trouble Area
C1A4B Stop Light Relay Circuit

Diagnosis Condition:


  • +BI1 and +BI2 terminal voltage is 8.9 V or higher

Malfunction status:

Either of the following occurs


  • When STPO is ON and STP is OFF, STP2 is OFF continuously for 0.3 seconds or more

  • When STPO is OFF and STP and STP2 input signal statuses differ continuously for 0.3 seconds or more

  • Skid control ECU assembly (brake actuator assembly) (for 2TR-FE)

  • Skid control ECU assembly (master cylinder solenoid) (except 2TR-FE)

  • Harness or connector

  • Rear combination light assembly LH

  • Rear combination light assembly RH

  • Center stop light assembly

  • Stop light switch assembly

  • Shift lock control ECU (transmission floor shift assembly)

  • ECM

  • Transmission control ECU assembly (for 1KD-FTV)

  • Certification ECU (smart key ECU assembly)

WIRING DIAGRAM

B001H34E01

CAUTION / NOTICE / HINT

Note

First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no CAN communication malfunctions before troubleshooting.

Click here

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (STP2, STPO AND STP TERMINAL)


    1. Turn the engine switch off.

    2. B001CNKC01
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Brake Actuator Assembly))
      B001CTYC02
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Master Cylinder Solenoid))

      Make sure that there is no looseness at the locking part and the connecting part of the connector.

      OK
      The connector is securely connected.

    3. for 2TR-FE:

      Disconnect the A6 skid control ECU (brake actuator assembly) connector.

    4. except 2TR-FE:

      Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

    5. Check both the connector case and the terminals for deformation and corrosion.

      OK
      No deformation or corrosion.

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

      Standard Voltage
      for 2TR-FE:
      Tester Connection Condition Specified Condition
      A6-2 (STP) - Body ground Stop light switch assembly on (Brake pedal depressed) 11 to 14 V*
      A6-2 (STP) - Body ground Stop light switch assembly off (Brake pedal released) Below 1.5 V
      A6-31 (STPO) - Body ground Always 11 to 14 V
      A6-22 (STP2) - Body ground Stop light switch assembly on (Brake pedal depressed) 11 to 14 V*
      A6-22 (STP2) - Body ground Stop light switch assembly off (Brake pedal released) Below 1.5 V
      except 2TR-FE:
      Tester Connection Condition Specified Condition
      A7-7 (STP) - Body ground Stop light switch assembly on (Brake pedal depressed) 11 to 14 V*
      A7-7 (STP) - Body ground Stop light switch assembly off (Brake pedal released) Below 1.5 V
      A7-16 (STPO) - Body ground Always 11 to 14 V
      A7-45 (STP2) - Body ground Stop light switch assembly on (Brake pedal depressed) 11 to 14 V*
      A7-45 (STP2) - Body ground Stop light switch assembly off (Brake pedal released) Below 1.5 V

      Tech Tips

      *: The minimum voltage value varies depending on the +BS terminal voltage value. The minimum voltage is 85% or more of the +BS terminal voltage.

    7. except 2TR-FE:

      Connect the A7 skid control ECU (master cylinder solenoid) connector.

    8. for 2TR-FE:

      Connect the A6 skid control ECU (brake actuator assembly) connector.

      Result
      Result Proceed to
      All terminal voltages are normal A
      Only STP2 terminal voltage abnormal (for 2TR-FE) B
      Only STP2 terminal voltage abnormal (except 2TR-FE) C
      Only STPO terminal voltage abnormal (for 2TR-FE) D
      Only STPO terminal voltage abnormal (except 2TR-FE) E
      Only STP terminal voltage abnormal (for 2TR-FE) F
      Only STP terminal voltage abnormal (except 2TR-FE) G
      STPO terminal and STP terminal voltage abnormal H

    B

    CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - SMART KEY ECU ASSEMBLY) Click here

    C

    CHECK HARNESS AND CONNECTOR (MASTER CYLINDER SOLENOID - SMART KEY ECU ASSEMBLY) Click here

    D

    CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - STOP LIGHT SWITCH ASSEMBLY) Click here

    E

    CHECK HARNESS AND CONNECTOR (MASTER CYLINDER SOLENOID - STOP LIGHT SWITCH ASSEMBLY) Click here

    F

    CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - REAR COMBINATION LIGHT ASSEMBLY LH) Click here

    G

    CHECK HARNESS AND CONNECTOR (MASTER CYLINDER SOLENOID - REAR COMBINATION LIGHT ASSEMBLY LH) Click here

    H

    CHECK STOP LIGHT SWITCH ASSEMBLY POWER SOURCE CIRCUIT Click here

    A

  2. PERFORM ACTIVE TEST USING GTS (STOP LIGHT RELAY)


    1. Enter the following menus: Chassis / ABS/VSC/TRC / Active Test.

      Chassis > ABS/VSC/TRC > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Stop Light Relay Stop light control relay (Stop light switch assembly) Relay OFF/ON Stop lights come on
      OK
      Stop light turns ON/OFF in response to the GTS operation
      Result
      Proceed to
      OK
      NG (for 2TR-FE)
      NG (except 2TR-FE)

    NG (for 2TR-FE)

    INSPECT BRAKE ACTUATOR ASSEMBLY Click here

    NG (except 2TR-FE)

    INSPECT MASTER CYLINDER SOLENOID Click here

    OK

  3. CHECK FOR DTC


    1. Clear the DTCs.

      Click here

    2. Enter the following menus: Chassis / ABS/VSC/TRC / Active Test.

      Chassis > ABS/VSC/TRC > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Stop Light Relay Stop light control relay (Stop light switch assembly) Relay OFF/ON Stop lights come on

    3. According to the display on the GTS, perform the Active Test.

    4. Check if the same DTC is output.

      Click here

      Result
      Result Proceed to
      C1380 is output (for 2TR-FE) A
      C1380 is output (except 2TR-FE) B
      C1380 is not output C

    A

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    B

    REPLACE MASTER CYLINDER SOLENOID for LHD: Click here
    REPLACE MASTER CYLINDER SOLENOID for RHD: Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

  4. INSPECT BRAKE ACTUATOR ASSEMBLY


    1. Enter the following menus: Chassis / ABS/VSC/TRC / Active Test.

      Chassis > ABS/VSC/TRC > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Stop Light Relay Stop light control relay (Stop light switch assembly) Relay OFF/ON Stop lights come on
    2. B001CUQC84
      *a

      Component with harness connected

      (Stop Light Switch Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A99-4 (ACC) - Body ground Active Test is on Below 1.5 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    NG

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

  5. INSPECT MASTER CYLINDER SOLENOID


    1. Enter the following menus: Chassis / ABS/VSC/TRC / Active Test.

      Chassis > ABS/VSC/TRC > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Stop Light Relay Stop light control relay (Stop light switch assembly) Relay OFF/ON Stop lights come on
    2. B001CUQC84
      *a

      Component with harness connected

      (Stop Light Switch Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A99-4 (ACC) - Body ground Active Test is on Below 1.5 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    NG

    REPLACE MASTER CYLINDER SOLENOID for LHD: Click here
    REPLACE MASTER CYLINDER SOLENOID for RHD: Click here

  6. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - SMART KEY ECU ASSEMBLY)


    1. B001CNKC03
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Brake Actuator Assembly))

      Make sure that there is no looseness at the locking part and the connecting part of the connector.

      OK
      The connector is securely connected.

    2. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

    3. Disconnect the G213 certification ECU (smart key ECU assembly) connector.

    4. Check both the connector case and the terminals for deformation and corrosion.

      OK
      No deformation or corrosion.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A6-22 (STP2) - Body ground Stop light switch assembly on (Brake pedal depressed) 11 to 14 V*
      A6-22 (STP2) - Body ground Stop light switch assembly off (Brake pedal released) Below 1.5 V

      Tech Tips

      *: The minimum voltage value varies depending on the +BS terminal voltage value. The minimum voltage is 85% or more of the +BS terminal voltage.

    6. Connect the G213 certification ECU (smart key ECU assembly) connector.

    7. Connect the A6 skid control ECU (brake actuator assembly) connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE SMART KEY ECU ASSEMBLY

    NG

  7. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - ECM)


    1. B001CNKC03
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Brake Actuator Assembly))

      Make sure that there is no looseness at the locking part and the connecting part of the connector.

      OK
      The connector is securely connected.

    2. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

    3. Disconnect the G213 certification ECU (smart key ECU assembly) connector.

    4. Disconnect the G180 ECM connector.

    5. Check both the connector case and the terminals for deformation and corrosion.

      OK
      No deformation or corrosion.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A6-22 (STP2) - Body ground Stop light switch assembly on (Brake pedal depressed) 11 to 14 V*
      A6-22 (STP2) - Body ground Stop light switch assembly off (Brake pedal released) Below 1.5 V

      Tech Tips

      *: The minimum voltage value varies depending on the +BS terminal voltage value. The minimum voltage is 85% or more of the +BS terminal voltage.

    7. Connect the G180 ECM connector.

    8. Connect the G213 certification ECU (smart key ECU assembly) connector.

    9. Connect the A6 skid control ECU (brake actuator assembly) connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

  8. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - TRANSMISSION FLOOR SHIFT ASSEMBLY)


    1. B001CNKC03
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Brake Actuator Assembly))

      Make sure that there is no looseness at the locking part and the connecting part of the connector.

      OK
      The connector is securely connected.

    2. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

    3. Disconnect the G213 certification ECU (smart key ECU assembly) connector.

    4. Disconnect the G180 ECM connector.

    5. Disconnect the G150 shift lock control ECU (transmission floor shift assembly) connector.

    6. Check both the connector case and the terminals for deformation and corrosion.

      OK
      No deformation or corrosion.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A6-22 (STP2) - Body ground Stop light switch assembly on (Brake pedal depressed) 11 to 14 V*
      A6-22 (STP2) - Body ground Stop light switch assembly off (Brake pedal released) Below 1.5 V

      Tech Tips

      *: The minimum voltage value varies depending on the +BS terminal voltage value. The minimum voltage is 85% or more of the +BS terminal voltage.

    8. Connect the G150 shift lock control ECU (transmission floor shift assembly) connector.

    9. Connect the G180 ECM connector.

    10. Connect the G213 certification ECU (smart key ECU assembly) connector.

    11. Connect the A6 skid control ECU (brake actuator assembly) connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE TRANSMISSION FLOOR SHIFT ASSEMBLY Click here

    NG

  9. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - STOP LIGHT SWITCH ASSEMBLY)


    1. B001CNKC03
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Brake Actuator Assembly))

      Make sure that there is no looseness at the locking part and the connecting part of the connector.

      OK
      The connector is securely connected.

    2. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

    3. Disconnect the G213 certification ECU (smart key ECU assembly) connector.

    4. Disconnect the G180 ECM connector.

    5. Disconnect the G150 shift lock control ECU (transmission floor shift assembly) connector.

    6. Disconnect the A99 stop light switch assembly connector.

    7. Check both the connector case and the terminals for deformation and corrosion.

      OK
      No deformation or corrosion.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A6-22 (STP2) - Body ground Always Below 1.5 V

    9. Connect the A99 stop light switch assembly connector.

    10. Connect the G150 shift lock control ECU (transmission floor shift assembly) connector.

    11. Connect the G180 ECM connector.

    12. Connect the G213 certification ECU (smart key ECU assembly) connector.

    13. Connect the A6 skid control ECU (brake actuator assembly) connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - STOP LIGHT SWITCH ASSEMBLY)


    1. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

    2. Disconnect the A99 stop light switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A6-22 (STP2) - A99-3 (L) Always Below 1 Ω
      A6-22 (STP2) or A99-3 (L) - Body ground Always 10 kΩ or higher

    4. Connect the A99 stop light switch assembly connector.

    5. Connect the A6 skid control ECU (brake actuator assembly) connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  11. CHECK HARNESS AND CONNECTOR (MASTER CYLINDER SOLENOID - SMART KEY ECU ASSEMBLY)


    1. B001CTYC03
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Master Cylinder Solenoid))

      Make sure that there is no looseness at the locking part and the connecting part of the connector.

      OK
      The connector is securely connected.

    2. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

    3. Disconnect the G213 certification ECU (smart key ECU assembly) connector.

    4. Check both the connector case and the terminals for deformation and corrosion.

      OK
      No deformation or corrosion.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A7-45 (STP2) - Body ground Stop light switch assembly on (Brake pedal depressed) 11 to 14 V*
      A7-45 (STP2) - Body ground Stop light switch assembly off (Brake pedal released) Below 1.5 V

      Tech Tips

      *: The minimum voltage value varies depending on the +BS terminal voltage value. The minimum voltage is 85% or more of the +BS terminal voltage.

    6. Connect the G213 certification ECU (smart key ECU assembly) connector.

    7. Connect the A7 skid control ECU (master cylinder solenoid) connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE SMART KEY ECU ASSEMBLY

    NG

  12. CHECK HARNESS AND CONNECTOR (MASTER CYLINDER SOLENOID - ECM)


    1. B001CTYC03
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Master Cylinder Solenoid))

      Make sure that there is no looseness at the locking part and the connecting part of the connector.

      OK
      The connector is securely connected.

    2. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

    3. Disconnect the G213 certification ECU (smart key ECU assembly) connector.

    4. Disconnect the G56*1, G57*2 or G185*3 ECM connector.


      • *1: for 1GR-FE

      • *2: for 1KD-FTV

      • *3: for 1GD-FTV

    5. Check both the connector case and the terminals for deformation and corrosion.

      OK
      No deformation or corrosion.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A7-45 (STP2) - Body ground Stop light switch assembly on (Brake pedal depressed) 11 to 14 V*
      A7-45 (STP2) - Body ground Stop light switch assembly off (Brake pedal released) Below 1.5 V

      Tech Tips

      *: The minimum voltage value varies depending on the +BS terminal voltage value. The minimum voltage is 85% or more of the +BS terminal voltage.

    7. Connect the G56*1, G57*2 or G185*3 ECM connector.


      • *1: for 1GR-FE

      • *2: for 1KD-FTV

      • *3: for 1GD-FTV

    8. Connect the G213 certification ECU (smart key ECU assembly) connector.

    9. Connect the A7 skid control ECU (master cylinder solenoid) connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM for 1GR-FE: Click here
    REPLACE ECM for 1KD-FTV: Click here
    REPLACE ECM for 1GD-FTV: Click here

    NG

  13. CHECK HARNESS AND CONNECTOR (MASTER CYLINDER SOLENOID - TRANSMISSION FLOOR SHIFT ASSEMBLY)


    1. B001CTYC03
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Master Cylinder Solenoid))

      Make sure that there is no looseness at the locking part and the connecting part of the connector.

      OK
      The connector is securely connected.

    2. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

    3. Disconnect the G213 certification ECU (smart key ECU assembly) connector.

    4. Disconnect the G56*1, G57*2 or G185*3 ECM connector.


      • *1: for 1GR-FE

      • *2: for 1KD-FTV

      • *3: for 1GD-FTV

    5. Disconnect the G150*1 or G45*2 shift lock control ECU (transmission floor shift assembly) connector.


      • *1: w/o Entry and Start System

      • *2: w/ Entry and Start System

    6. Check both the connector case and the terminals for deformation and corrosion.

      OK
      No deformation or corrosion.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A7-45 (STP2) - Body ground Stop light switch assembly on (Brake pedal depressed) 11 to 14 V*
      A7-45 (STP2) - Body ground Stop light switch assembly off (Brake pedal released) Below 1.5 V

      Tech Tips

      *: The minimum voltage value varies depending on the +BS terminal voltage value. The minimum voltage is 85% or more of the +BS terminal voltage.

    8. Connect the G150*1 or G45*2 shift lock control ECU (transmission floor shift assembly) connector.


      • *1: w/o Entry and Start System

      • *2: w/ Entry and Start System

    9. Connect the G56*1, G57*2 or G185*3 ECM connector.


      • *1: for 1GR-FE

      • *2: for 1KD-FTV

      • *3: for 1GD-FTV

    10. Connect the G213 certification ECU (smart key ECU assembly) connector.

    11. Connect the A7 skid control ECU (master cylinder solenoid) connector.

      Result
      Proceed to
      OK
      NG (for 1KD-FTV (for Automatic Transmission))
      NG (except 1KD-FTV (for Automatic Transmission))

    OK

    REPLACE TRANSMISSION FLOOR SHIFT ASSEMBLY for A750F: Click here
    REPLACE TRANSMISSION FLOOR SHIFT ASSEMBLY for AC60F: Click here

    NG (except 1KD-FTV (for Automatic Transmission))

    GO TO STEP 15 Click here

    NG (for 1KD-FTV (for Automatic Transmission))

  14. CHECK HARNESS AND CONNECTOR (MASTER CYLINDER SOLENOID - TCM)


    1. B001CTYC03
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Master Cylinder Solenoid))

      Make sure that there is no looseness at the locking part and the connecting part of the connector.

      OK
      The connector is securely connected.

    2. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

    3. Disconnect the G213 certification ECU (smart key ECU assembly) connector.

    4. Disconnect the G56*1, G57*2 or G185*3 ECM connector.


      • *1: for 1GR-FE

      • *2: for 1KD-FTV

      • *3: for 1GD-FTV

    5. Disconnect the G150*1 or G45*2 shift lock control ECU (transmission floor shift assembly) connector.


      • *1: w/o Entry and Start System

      • *2: w/ Entry and Start System

    6. Disconnect the G70 TCM connector.

    7. Check both the connector case and the terminals for deformation and corrosion.

      OK
      No deformation or corrosion.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A7-45 (STP2) - Body ground Stop light switch assembly on (Brake pedal depressed) 11 to 14 V*
      A7-45 (STP2) - Body ground Stop light switch assembly off (Brake pedal released) Below 1.5 V

      Tech Tips

      *: The minimum voltage value varies depending on the +BS terminal voltage value. The minimum voltage is 85% or more of the +BS terminal voltage.

    9. Connect the G70 TCM connector.

    10. Connect the G150*1 or G45*2 shift lock control ECU (transmission floor shift assembly) connector.


      • *1: w/o Entry and Start System

      • *2: w/ Entry and Start System

    11. Connect the G56*1, G57*2 or G185*3 ECM connector.


      • *1: for 1GR-FE

      • *2: for 1KD-FTV

      • *3: for 1GD-FTV

    12. Connect the G213 certification ECU (smart key ECU assembly) connector.

    13. Connect the A7 skid control ECU (master cylinder solenoid) connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE TCM Click here

    NG

  15. CHECK HARNESS AND CONNECTOR (MASTER CYLINDER SOLENOID - STOP LIGHT SWITCH ASSEMBLY)


    1. B001CTYC03
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Master Cylinder Solenoid))

      Make sure that there is no looseness at the locking part and the connecting part of the connector.

      OK
      The connector is securely connected.

    2. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

    3. Disconnect the G213 certification ECU (smart key ECU assembly) connector.

    4. Disconnect the G56*1, G57*2 or G185*3 ECM connector.


      • *1: for 1GR-FE

      • *2: for 1KD-FTV

      • *3: for 1GD-FTV

    5. Disconnect the G150*1 or G45*2 shift lock control ECU (transmission floor shift assembly) connector.


      • *1: w/o Entry and Start System

      • *2: w/ Entry and Start System

    6. for 1KD-FTV:

      Disconnect the G70 TCM connector.

    7. Disconnect the A99 stop light switch assembly connector.

    8. Check both the connector case and the terminals for deformation and corrosion.

      OK
      No deformation or corrosion.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A7-45 (STP2) - Body ground Always Below 1.5 V

    10. Connect the A99 stop light switch assembly connector.

    11. for 1KD-FTV:

      Connect the G70 TCM connector.

    12. Connect the G150*1 or G45*2 shift lock control ECU (transmission floor shift assembly) connector.


      • *1: w/o Entry and Start System

      • *2: w/ Entry and Start System

    13. Connect the G56*1, G57*2 or G185*3 ECM connector.


      • *1: for 1GR-FE

      • *2: for 1KD-FTV

      • *3: for 1GD-FTV

    14. Connect the G213 certification ECU (smart key ECU assembly) connector.

    15. Connect the A7 skid control ECU (master cylinder solenoid) connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  16. CHECK HARNESS AND CONNECTOR (MASTER CYLINDER SOLENOID - STOP LIGHT SWITCH ASSEMBLY)


    1. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

    2. Disconnect the A99 stop light switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A7-45 (STP2) - A99-3 (L) Always Below 1 Ω
      A7-45 (STP2) or A99-3 (L) - Body ground Always 10 kΩ or higher

    4. Connect the A99 stop light switch assembly connector.

    5. Connect the A7 skid control ECU (master cylinder solenoid) connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  17. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - STOP LIGHT SWITCH ASSEMBLY)


    1. Make sure that there is no looseness at the locking part and the connecting part of the connector.

      OK
      The connector is securely connected.

    2. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

    3. Disconnect the A99 stop light switch assembly connector.

    4. Check both the connector case and the terminals for deformation and corrosion.

      OK
      No deformation or corrosion.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A6-31 (STPO) - A99-4 (ACC) Always Below 1 Ω

    6. Connect the A99 stop light switch assembly connector.

    7. Connect the A6 skid control ECU (brake actuator assembly) connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  18. CHECK HARNESS AND CONNECTOR (MASTER CYLINDER SOLENOID - STOP LIGHT SWITCH ASSEMBLY)


    1. Make sure that there is no looseness at the locking part and the connecting part of the connector.

      OK
      The connector is securely connected.

    2. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

    3. Disconnect the A99 stop light switch assembly connector.

    4. Check both the connector case and the terminals for deformation and corrosion.

      OK
      No deformation or corrosion.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A7-16 (STPO) - A99-4 (ACC) Always Below 1 Ω

    6. Connect the A99 stop light switch assembly connector.

    7. Connect the A7 skid control ECU (master cylinder solenoid) connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  19. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - REAR COMBINATION LIGHT ASSEMBLY LH)


    1. B001CNKC02
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Brake Actuator Assembly))

      Make sure that there is no looseness at the locking part and the connecting part of the connector.

      OK
      The connector is securely connected.

    2. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

    3. Disconnect the R22 rear combination light assembly LH connector.

    4. Check both the connector case and the terminals for deformation and corrosion.

      OK
      No deformation or corrosion.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A6-2 (STP) - Body ground Stop light switch assembly on (Brake pedal depressed) 11 to 14 V*
      A6-2 (STP) - Body ground Stop light switch assembly off (Brake pedal released) Below 1.5 V

      Tech Tips

      *: The minimum voltage value varies depending on the +BS terminal voltage value. The minimum voltage is 85% or more of the +BS terminal voltage.

    6. Connect the R22 rear combination light assembly LH connector.

    7. Connect the A6 skid control ECU (brake actuator assembly) connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE REAR COMBINATION LIGHT ASSEMBLY LH Click here

    NG

  20. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - REAR COMBINATION LIGHT ASSEMBLY RH)


    1. B001CNKC02
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Brake Actuator Assembly))

      Make sure that there is no looseness at the locking part and the connecting part of the connector.

      OK
      The connector is securely connected.

    2. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

    3. Disconnect the R22 rear combination light assembly LH connector.

    4. Disconnect the Q31*1 or R21*2 rear combination light assembly RH connector.


      • *1: for 3 Door

      • *2: for 5 Door

    5. Check both the connector case and the terminals for deformation and corrosion.

      OK
      No deformation or corrosion.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A6-2 (STP) - Body ground Stop light switch assembly on (Brake pedal depressed) 11 to 14 V*
      A6-2 (STP) - Body ground Stop light switch assembly off (Brake pedal released) Below 1.5 V

      Tech Tips

      *: The minimum voltage value varies depending on the +BS terminal voltage value. The minimum voltage is 85% or more of the +BS terminal voltage.

    7. Connect the Q31*1 or R21*2 rear combination light assembly RH connector.


      • *1: for 3 Door

      • *2: for 5 Door

    8. Connect the R22 rear combination light assembly LH connector.

    9. Connect the A6 skid control ECU (brake actuator assembly) connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE REAR COMBINATION LIGHT ASSEMBLY RH Click here

    NG

  21. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - CENTER STOP LIGHT SET)


    1. B001CNKC02
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Brake Actuator Assembly))

      Make sure that there is no looseness at the locking part and the connecting part of the connector.

      OK
      The connector is securely connected.

    2. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

    3. Disconnect the R22 rear combination light assembly LH connector.

    4. Disconnect the Q31*1 or R21*2 rear combination light assembly RH connector.


      • *1: for 3 Door

      • *2: for 5 Door

    5. Disconnect the Z1 center stop light assembly connector.

    6. Check both the connector case and the terminals for deformation and corrosion.

      OK
      No deformation or corrosion.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A6-2 (STP) - Body ground Stop light switch assembly on (Brake pedal depressed) 11 to 14 V*
      A6-2 (STP) - Body ground Stop light switch assembly off (Brake pedal released) Below 1.5 V

      Tech Tips

      *: The minimum voltage value varies depending on the +BS terminal voltage value. The minimum voltage is 85% or more of the +BS terminal voltage.

    8. Connect the Z1 center stop light assembly connector.

    9. Connect the Q31*1 or R21*2 rear combination light assembly RH connector.


      • *1: for 3 Door

      • *2: for 5 Door

    10. Connect the R22 rear combination light assembly LH connector.

    11. Connect the A6 skid control ECU (brake actuator assembly) connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE CENTER STOP LIGHT ASSEMBLY Click here

    NG

  22. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - STOP LIGHT SWITCH ASSEMBLY)


    1. B001CNKC02
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Brake Actuator Assembly))

      Make sure that there is no looseness at the locking part and the connecting part of the connector.

      OK
      The connector is securely connected.

    2. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

    3. Disconnect the R22 rear combination light assembly LH connector.

    4. Disconnect the Q31*1 or R21*2 rear combination light assembly RH connector.


      • *1: for 3 Door

      • *2: for 5 Door

    5. Disconnect the Z1 center stop light assembly connector.

    6. Disconnect the A99 stop light switch assembly connector.

    7. Check both the connector case and the terminals for deformation and corrosion.

      OK
      No deformation or corrosion.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A6-2 (STP) - Body ground Always Below 1.5 V

    9. Connect the A99 stop light switch assembly connector.

    10. Connect the Z1 center stop light assembly connector.

    11. Connect the Q31*1 or R21*2 rear combination light assembly RH connector.


      • *1: for 3 Door

      • *2: for 5 Door

    12. Connect the R22 rear combination light assembly LH connector.

    13. Connect the A6 skid control ECU (brake actuator assembly) connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  23. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - STOP LIGHT SWITCH ASSEMBLY)


    1. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

    2. Disconnect the A99 stop light switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A99-1 (OUT) - A6-2 (STP) Always Below 1 Ω
      A99-1 (OUT) or A6-2 (STP) - Body ground Always 10 kΩ or higher

    4. Connect the A99 stop light switch assembly connector.

    5. Connect the A6 skid control ECU (brake actuator assembly) connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  24. CHECK HARNESS AND CONNECTOR (MASTER CYLINDER SOLENOID - REAR COMBINATION LIGHT ASSEMBLY LH)


    1. B001CTYC01
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Master Cylinder Solenoid))

      Make sure that there is no looseness at the locking part and the connecting part of the connector.

      OK
      The connector is securely connected.

    2. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

    3. Disconnect the R22 rear combination light assembly LH connector.

    4. Check both the connector case and the terminals for deformation and corrosion.

      OK
      No deformation or corrosion.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A7-7 (STP) - Body ground Stop light switch assembly on (Brake pedal depressed) 11 to 14 V*
      A7-7 (STP) - Body ground Stop light switch assembly off (Brake pedal released) Below 1.5 V

      Tech Tips

      *: The minimum voltage value varies depending on the +BS terminal voltage value. The minimum voltage is 85% or more of the +BS terminal voltage.

    6. Connect the R22 rear combination light assembly LH connector.

    7. Connect the A7 skid control ECU (master cylinder solenoid) connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE REAR COMBINATION LIGHT ASSEMBLY LH Click here

    NG

  25. CHECK HARNESS AND CONNECTOR (MASTER CYLINDER SOLENOID - REAR COMBINATION LIGHT ASSEMBLY RH)


    1. B001CTYC01
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Master Cylinder Solenoid))

      Make sure that there is no looseness at the locking part and the connecting part of the connector.

      OK
      The connector is securely connected.

    2. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

    3. Disconnect the R22 rear combination light assembly LH connector.

    4. Disconnect the Q31*1 or R21*2 rear combination light assembly RH connector.


      • *1: for 3 Door

      • *2: for 5 Door

    5. Check both the connector case and the terminals for deformation and corrosion.

      OK
      No deformation or corrosion.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A7-7 (STP) - Body ground Stop light switch assembly on (Brake pedal depressed) 11 to 14 V*
      A7-7 (STP) - Body ground Stop light switch assembly off (Brake pedal released) Below 1.5 V

      Tech Tips

      *: The minimum voltage value varies depending on the +BS terminal voltage value. The minimum voltage is 85% or more of the +BS terminal voltage.

    7. Connect the Q31*1 or R21*2 rear combination light assembly RH connector.


      • *1: for 3 Door

      • *2: for 5 Door

    8. Connect the R22 rear combination light assembly LH connector.

    9. Connect the A7 skid control ECU (master cylinder solenoid) connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE REAR COMBINATION LIGHT ASSEMBLY RH Click here

    NG

  26. CHECK HARNESS AND CONNECTOR (MASTER CYLINDER SOLENOID - CENTER STOP LIGHT SET)


    1. B001CTYC01
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Master Cylinder Solenoid))

      Make sure that there is no looseness at the locking part and the connecting part of the connector.

      OK
      The connector is securely connected.

    2. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

    3. Disconnect the R22 rear combination light assembly LH connector.

    4. Disconnect the Q31*1 or R21*2 rear combination light assembly RH connector.


      • *1: for 3 Door

      • *2: for 5 Door

    5. Disconnect the Z1 center stop light assembly connector.

    6. Check both the connector case and the terminals for deformation and corrosion.

      OK
      No deformation or corrosion.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A7-7 (STP) - Body ground Stop light switch assembly on (Brake pedal depressed) 11 to 14 V*
      A7-7 (STP) - Body ground Stop light switch assembly off (Brake pedal released) Below 1.5 V

      Tech Tips

      *: The minimum voltage value varies depending on the +BS terminal voltage value. The minimum voltage is 85% or more of the +BS terminal voltage.

    8. Connect the Z1 center stop light assembly connector.

    9. Connect the Q31*1 or R21*2 rear combination light assembly RH connector.


      • *1: for 3 Door

      • *2: for 5 Door

    10. Connect the R22 rear combination light assembly LH connector.

    11. Connect the A7 skid control ECU (master cylinder solenoid) connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE CENTER STOP LIGHT ASSEMBLY Click here

    NG

  27. CHECK HARNESS AND CONNECTOR (MASTER CYLINDER SOLENOID - STOP LIGHT SWITCH ASSEMBLY)


    1. B001CTYC01
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Master Cylinder Solenoid))

      Make sure that there is no looseness at the locking part and the connecting part of the connector.

      OK
      The connector is securely connected.

    2. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

    3. Disconnect the R22 rear combination light assembly LH connector.

    4. Disconnect the Q31*1 or R21*2 rear combination light assembly RH connector.


      • *1: for 3 Door

      • *2: for 5 Door

    5. Disconnect the Z1 center stop light assembly connector.

    6. Disconnect the A99 stop light switch assembly connector.

    7. Check both the connector case and the terminals for deformation and corrosion.

      OK
      No deformation or corrosion.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A7-7 (STP) - Body ground Always Below 1.5 V

    9. Connect the A99 stop light switch assembly connector.

    10. Connect the Z1 center stop light assembly connector.

    11. Connect the Q31*1 or R21*2 rear combination light assembly RH connector.


      • *1: for 3 Door

      • *2: for 5 Door

    12. Connect the R22 rear combination light assembly LH connector.

    13. Connect the A7 skid control ECU (master cylinder solenoid) connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  28. CHECK HARNESS AND CONNECTOR (MASTER CYLINDER SOLENOID - STOP LIGHT SWITCH ASSEMBLY)


    1. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

    2. Disconnect the A99 stop light switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A99-1 (OUT) - A7-7 (STP) Always Below 1 Ω
      A99-1 (OUT) or A7-7 (STP) - Body ground Always 10 kΩ or higher

    4. Connect the A99 stop light switch assembly connector.

    5. Connect the A7 skid control ECU (master cylinder solenoid) connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  29. CHECK STOP LIGHT SWITCH ASSEMBLY POWER SOURCE CIRCUIT


    1. B001HWBC15
      *a

      Front view of wire harness connector

      (to Stop Light Switch Assembly)

      Make sure that there is no looseness at the locking part and the connecting part of the connector.

      OK
      The connector is securely connected.

    2. Disconnect the A99 stop light switch assembly connector.

    3. Check both the connector case and the terminals for deformation and corrosion.

      OK
      No deformation or corrosion.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A99-2 (GND) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A99-7 (B) - Body ground Always 11 to 14 V

    6. Connect the A99 stop light switch assembly connector.

      Result
      Proceed to
      OK (for 2TR-FE)
      OK (except 2TR-FE)
      NG

    OK (except 2TR-FE)

    CHECK HARNESS AND CONNECTOR (MASTER CYLINDER SOLENOID - STOP LIGHT SWITCH ASSEMBLY) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK (for 2TR-FE)

  30. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - STOP LIGHT SWITCH ASSEMBLY)


    1. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

    2. Disconnect the A99 stop light switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A6-31 (STPO) or A99-4 (ACC) - Body ground Always 10 kΩ or higher

    4. Connect the A99 stop light switch assembly connector.

    5. Connect the A6 skid control ECU (brake actuator assembly) connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  31. CHECK HARNESS AND CONNECTOR (MASTER CYLINDER SOLENOID - STOP LIGHT SWITCH ASSEMBLY)


    1. Disconnect the A7 skid control ECU (master cylinder solenoid) connector.

    2. Disconnect the A99 stop light switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A7-16 (STPO) or A99-4 (ACC) - Body ground Always 10 kΩ or higher

    4. Connect the A99 stop light switch assembly connector.

    5. Connect the A7 skid control ECU (master cylinder solenoid) connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR