ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1380

DTC Code DTC Name
C1380 Stop Light Control Relay Malfunction

DESCRIPTION

Upon receiving the dynamic radar cruise control or brake hold control operating signal from the skid control ECU (brake booster with master cylinder assembly), the relay contact turns on and the stop lights come on.

DTC No. Detection Item INF Code DTC Detection Condition Trouble Area Note
C1380 Stop Light Control Relay Malfunction

761

762

  • INF Code: 761


    • When terminal BS voltage is 9.5 V or more, stop light drive output (STP0) is ON and STP2 is OFF for 2 seconds or more.

  • INF Code: 762


    • When terminal IG1 voltage is 9.5 V or more, stop light drive output (STP0) is OFF and the input signals for STP and STP2 differ for 5 seconds or more.

  • INF Code: 761


    • STOP fuse

    • Harness or connector

    • Stop light switch assembly

    • Skid control ECU (brake booster with master cylinder assembly)

  • INF Code: 762


    • STOP fuse

    • Harness or connector

    • Stop light switch assembly

    • Skid control ECU (brake booster with master cylinder assembly)

 VSC DTC

WIRING DIAGRAM

A005NJ2E02

CAUTION / NOTICE / HINT

Note


  • After replacing the skid control ECU (brake booster with master cylinder assembly), perform linear solenoid valve offset learning, ABS holding solenoid valve learning, yaw rate and acceleration sensor zero point calibration and system information memorization after performing "Reset Memory".

    Click here

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

  • Before replacing the certification ECU (smart key ECU assembly), refer to Service Bulletin.

PROCEDURE


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


    1. Turn the power switch off.

    2. A005NB5C97
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Brake Booster with Master Cylinder Assembly))

      Disconnect the skid control ECU (brake booster with master cylinder assembly) connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A39-12 (STP) - Body ground Brake pedal depressed 11 to 14 V
      Brake pedal released Below 1.5 V
      A39-22 (STPO) - Body ground Always 11 to 14 V
      A39-37 (STP2) - Body ground Brake pedal depressed 11 to 14 V
      Brake pedal released Below 1.5 V
      Result
      Result Proceed to
      All terminal voltage is normal A
      Only STP2 terminal voltage abnormal B
      Only STPO terminal voltage abnormal C
      Only STP terminal voltage abnormal D
      STPO terminal and STP2 terminal voltage abnormal E

    B

    CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - HYBRID VEHICLE CONTROL ECU) Click here

    C

    CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - STOP LIGHT SWITCH ASSEMBLY) Click here

    D

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

    E

    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.

    2. Perform "Active Test" according to the display on the GTS.


      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) ON or OFF Stop lights come on

      Chassis > ABS/VSC/TRC > Active Test
      Tester Display
      Stop Light Relay
      OK
      Stop light turns ON/OFF in response to the GTS operation
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY Click here

    OK

  3. CHECK FOR DTC


    1. Clear the DTCs.

      Click here


      Chassis > ABS/VSC/TRC > Clear DTCs

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

    3. Perform "Active Test" according to the display on the GTS.


      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) ON or OFF Stop lights come on

      Chassis > ABS/VSC/TRC > Active Test
      Tester Display
      Stop Light Relay

    4. Check for DTCs.

      Click here


      Chassis > ABS/VSC/TRC > Clear DTCs
      Result
      Result Proceed to
      DTC C1380 is output (for LHD) A
      DTC C1380 is output (for RHD) B
      DTC C1380 is not output C

    A

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY Click here

    B

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

  4. INSPECT BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY


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

    2. Perform "Active Test" according to the display on the GTS.


      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) ON or OFF Stop lights come on

      Chassis > ABS/VSC/TRC > Active Test
      Tester Display
      Stop Light Relay
    3. A005ND8C57
      *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
      A45-4 (ACC) - Body ground Active Test is ON Below 1.5 V
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    A

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    B

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY Click here

    C

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY Click here

  5. CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - HYBRID VEHICLE CONTROL ECU)


    1. A005MMIC01
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Brake Booster with Master Cylinder 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 A49 hybrid vehicle control ECU connector.

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

      OK
      No deformation or corrosion.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A39-37 (STP2) - Body ground Stop light switch assembly on (Brake pedal depressed) 11 to 14 V
      A39-37 (STP2) - Body ground Stop light switch assembly off (Brake pedal released) Below 1.5 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    NG

  6. CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - SMART KEY ECU ASSEMBLY)


    1. A005MMIC01
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Brake Booster with Master Cylinder 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 M67 certification ECU (smart key ECU assembly) connector.

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

      OK
      No deformation or corrosion.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A39-37 (STP2) - Body ground Stop light switch assembly on (Brake pedal depressed) 11 to 14 V
      A39-37 (STP2) - Body ground Stop light switch assembly off (Brake pedal released) Below 1.5 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE SMART KEY ECU ASSEMBLY

    NG

  7. CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - STOP LIGHT SWITCH ASSEMBLY)


    1. A005MMIC01
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Brake Booster with Master Cylinder 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 A45 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 voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      A39-37 (STP2) - Body ground Always Below 1.5 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - STOP LIGHT SWITCH ASSEMBLY)


    1. Turn the power switch off.

    2. Disconnect the A39 skid control ECU (brake booster with master cylinder assembly) connector.

    3. Disconnect the A45 stop light switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A39-37 (STP2) - A45-3 (L) Always Below 1 Ω
      A39-37 (STP2) or A45-3 (L) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - STOP LIGHT SWITCH ASSEMBLY)


    1. Turn the power switch off.

    2. Disconnect the A39 skid control ECU (brake booster with master cylinder assembly) connector.

    3. Disconnect the A45 stop light switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A39-22 (STPO) - A45-4 (ACC) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  10. CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - REAR COMBINATION LIGHT ASSEMBLY LH)


    1. Turn the power switch off.

    2. Disconnect the A39 skid control ECU (brake booster with master cylinder assembly) connector.

    3. Disconnect the M48 rear combination light assembly LH connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A39-12 (STP) - Body ground Brake pedal depressed 11 to 14 V
      A39-12 (STP) - Body ground Brake pedal released Below 1.5 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE REAR COMBINATION LIGHT ASSEMBLY LH for LED Type: Click here
    REPLACE REAR COMBINATION LIGHT ASSEMBLY LH for Bulb Type: Click here

    NG

  11. CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - REAR COMBINATION LIGHT ASSEMBLY RH)


    1. Turn the power switch off.

    2. Disconnect the A39 skid control ECU (brake booster with master cylinder assembly) connector.

    3. Disconnect the M48 rear combination light assembly LH connector.

    4. Disconnect the M47 rear combination light assembly RH connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A39-12 (STP) - Body ground Brake pedal depressed 11 to 14 V
      A39-12 (STP) - Body ground Brake pedal released Below 1.5 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE REAR COMBINATION LIGHT ASSEMBLY RH for LED Type: Click here
    REPLACE REAR COMBINATION LIGHT ASSEMBLY RH for Bulb Type: Click here

    NG

  12. CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - CENTER STOP LIGHT ASSEMBLY)


    1. Turn the power switch off.

    2. Disconnect the A39 skid control ECU (brake booster with master cylinder assembly) connector.

    3. Disconnect the M48 rear combination light assembly LH connector.

    4. Disconnect the M47 rear combination light assembly RH connector.

    5. Disconnect the c1 center stop light assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A39-12 (STP) - Body ground Brake pedal depressed 11 to 14 V
      A39-12 (STP) - Body ground Brake pedal released Below 1.5 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE CENTER STOP LIGHT ASSEMBLY Click here

    NG

  13. CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - STOP LIGHT SWITCH ASSEMBLY)


    1. Turn the power switch off.

    2. Disconnect the A39 skid control ECU (brake booster with master cylinder assembly) connector.

    3. Disconnect the M48 rear combination light assembly LH connector.

    4. Disconnect the M47 rear combination light assembly RH connector.

    5. Disconnect the c1 center stop light assembly connector.

    6. Disconnect the A45 stop light switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A45-1 (OUT) - A39-12 (STP) Always Below 1 Ω
      A45-1 (OUT) or A39-12 (STP) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  14. CHECK STOP LIGHT SWITCH ASSEMBLY POWER SOURCE CIRCUIT


    1. Turn the power switch off.

    2. A005NF9C02
      *a

      Front view of wire harness connector

      (to Stop Light Switch Assembly)

      Disconnect the 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
      A45-2 (GND) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A45-7 (B) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  15. CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - STOP LIGHT SWITCH ASSEMBLY)


    1. Turn the power switch off.

    2. Disconnect the A39 skid control ECU (brake booster with master cylinder assembly) connector.

    3. Disconnect the A45 stop light switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A39-22 (STPO) - A45-4 (ACC) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR