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Home >> Infiniti >> 2015 >> QX60 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 70 (Brake Control System (DTC/Circuit Diagnosis) (With ICC) (Except Hybrid) (2 Of 2)) >> DTC/Circuit Diagnosis >> DTC C1116: Stop Lamp Switch >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

DTC "C1116" may be detected when the brake pedal and the accelerator pedal are simultaneously depressed for 1 minute or more while driving the vehicle. This is not a malfunction.

  1. INTERVIEW FROM THE CUSTOMER

    Check if the brake pedal and the accelerator pedal are simultaneously depressed for 1 minute or more while driving the vehicle.

    Is there such a history?

    YES 

    GO TO STEP 2  .

    NO 

    GO TO STEP 3  .

  2. PERFORM SELF-DIAGNOSIS

    G-20 CONSULT

    1. Erase "Self Diagnostic Result" of "ABS"
    2. Turn the ignition switch OFF → ON → OFF.
      NOTE:

      Wait at least 10 seconds after turning ignition switch OFF or ON.

    3. Start the engine.
      NOTE:

      Stop the vehicle.

    4. Depress the brake pedal several times.
    5. Turn the ignition switch OFF.
      NOTE:

      Wait at least 10 seconds after turning ignition switch OFF.

    6. Start the engine.
      NOTE:

      Wait at least 10 seconds after starting the engine.

    7. Select "Self Diagnostic Result" of "ABS".

    Is DTC "C1116" detected?

    YES 

    GO TO STEP 3  .

    NO 

    Inspection End.

  3. STOP LAMP FOR ILLUMINATION

    Depress brake pedal and check that stop lamp turns ON.

    Does stop lamp turn ON?

    YES 

    GO TO STEP 5  .

    NO 

    Check the stop lamp system. Refer to DIAGNOSIS PROCEDURE . GO TO STEP 4  .

  4. CHECK DATA MONITOR (1)

    G-20 CONSULT

    1. Erase "Self Diagnostic Result" of "ABS"
    2. Turn the ignition switch OFF → ON → OFF.
      NOTE:

      Wait at least 10 seconds after turning ignition switch OFF or ON.

    3. Start the engine.
      NOTE:

      Stop the vehicle.

    4. Select "DATA MONITOR" of "ABS", check "STOP LAMP SW". Check that data monitor displays "On" or "Off" when brake pedal is depressed or released. Refer to REFERENCE VALUE .
    5. Select "DATA MONITOR" of "ABS", check "PRESS SENSOR". Check that data monitor displays "5 bar" or less when brake pedal is depressed. Refer to REFERENCE VALUE .

    Is the inspection result normal?

    YES 

    Inspection End.

    NO 

    GO TO STEP 5  .

  5. CHECK CONNECTOR

    1. Turn the ignition switch OFF.
    2. Check the ABS actuator and electric unit (control unit) harness connector for disconnection or looseness.
    3. Check the stop lamp switch harness connector for disconnection or looseness.

    Is the inspection result normal?

    YES 

    GO TO STEP 6  .

    NO 

    Repair / replace harness or connector, and GO TO STEP 6  .

  6. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY AND GROUND CIRCUIT

    Check the ABS actuator and electric unit (control unit) power supply and ground circuits. Refer to DIAGNOSIS PROCEDURE .

    Is the inspection result normal?

    YES 

    GO TO STEP 7  .

    NO 

    Repair / replace harness, connector, fuse, or fusible link.

  7. CHECK STOP LAMP SWITCH CLEARANCE

    1. Turn the ignition switch OFF.
    2. Check the stop lamp switch clearance. Refer to INSPECTION .

    Is the inspection result normal?

    YES 

    GO TO STEP 9  .

    NO 

    Adjust stop lamp switch clearance. Refer to ADJUSTMENT . GO TO STEP 8  .

  8. CHECK DATA MONITOR (2)

    G-20 CONSULT

    1. Erase "Self Diagnostic Result" of "ABS"
    2. Turn the ignition switch OFF → ON → OFF.
      NOTE:

      Wait at least 10 seconds after turning ignition switch OFF or ON.

    3. Start the engine.
      NOTE:

      Stop the vehicle.

    4. Select "DATA MONITOR" of "ABS", check "STOP LAMP SW". Check that data monitor displays "On" or "Off" when brake pedal is depressed or released. Refer to REFERENCE VALUE .
    5. Select "DATA MONITOR" of "ABS", check "PRESS SENSOR". Check that data monitor displays "5 bar" or less when brake pedal is depressed. Refer to REFERENCE VALUE .

    Is the inspection result normal?

    YES 

    Inspection End.

    NO 

    GO TO STEP 9  .

  9. CHECK STOP LAMP SWITCH

    Check the stop lamp switch. Refer to COMPONENT INSPECTION .

    Is the inspection result normal?

    YES 

    GO TO STEP 10  .

    NO 

    Replace the stop lamp switch. Refer to EXPLODED VIEW . GO TO STEP 10  .

  10. CHECK DATA MONITOR (3)

    G-20 CONSULT

    1. Erase "Self Diagnostic Result" of "ABS"
    2. Turn the ignition switch OFF → ON → OFF.
      NOTE:

      Wait at least 10 seconds after turning ignition switch OFF or ON.

    3. Start the engine.
      NOTE:

      Start the vehicle.

    4. Select "DATA MONITOR" of "ABS", check "STOP LAMP SW". Check that data monitor displays "On" or "Off" when brake pedal is depressed or released. Refer to REFERENCE VALUE .
    5. Select "DATA MONITOR" of "ABS", check "PRESS SENSOR". Check that data monitor displays "5 bar" or less when brake pedal is depressed. Refer to REFERENCE VALUE .

    Is the inspection result normal?

    YES 

    Inspection End.

    NO 

    GO TO STEP 11  .

  11. CHECK CONNECTOR AND TERMINAL

    1. Turn the ignition switch OFF.
    2. Disconnect ABS actuator and electric unit (control unit) harness connector.
    3. Check the ABS actuator and electric unit (control unit) harness connector for disconnection or looseness.
    4. Check the ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with harness connector.
    5. Disconnect stop lamp switch harness connector.
    6. Check the stop lamp switch harness connector for disconnection or looseness.
    7. Check the stop lamp switch pin terminals for damage or loose connection with harness connector.
    8. Disconnect resistor harness connector. (Models with ICC)
    9. Check the resistor harness connector for disconnection or looseness. (Models with ICC)
    10. Check the resistor pin terminals for damage or loose connection with harness connector. (Models with ICC)

    Is the inspection result normal?

    YES 

    GO TO STEP 13  .

    NO 

    Repair / replace harness, connector, or terminal, and GO TO STEP 12  .

  12. CHECK DATA MONITOR (4)

    G-20 With CONSULT

    1. Connect ABS actuator and electric unit (control unit) harness connector.
    2. Connect stop lamp switch harness connector.
    3. Connect resistor harness connector. (Models with ICC)
    4. Erase "Self Diagnostic Result" of "ABS"
    5. Turn the ignition switch OFF → ON → OFF.
      NOTE:

      Wait at least 10 seconds after turning ignition switch OFF or ON.

    6. Start the engine.
      NOTE:

      Stop the vehicle.

    7. Select "DATA MONITOR" of "ABS", check "STOP LAMP SW". Check that data monitor displays "On" or "Off" when brake pedal is depressed or released. Refer to REFERENCE VALUE .
    8. Select "DATA MONITOR" of "ABS", check "PRESS SENSOR". Check that data monitor displays "5 bar" or less when brake pedal is depressed. Refer to REFERENCE VALUE .

    Is the inspection result normal?

    YES 

    Inspection End.

    NO 

    GO TO STEP 13  .

  13. CHECK STOP LAMP SWITCH CIRCUIT (1)

    1. Turn the ignition switch OFF.
    2. Disconnect ABS actuator and electric unit (control unit) harness connector.
    3. Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.
      ABS actuator and electric unit (control unit) - Condition Voltage
      Connector Terminal
      E125 7 Ground Brake pedal depressed 10 - 16 V
      Brake pedal not depressed Approx. 0 V
    4. Turn the ignition switch ON.
    5. Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.
      ABS actuator and electric unit (control unit) - Condition Voltage
      Connector Terminal
      E125 7 Ground Brake pedal depressed 10 - 16 V
      Brake pedal not depressed Approx. 0 V

    Is the inspection result normal?

    YES 

    Replace the ABS actuator and electric unit (control unit). Refer to REMOVAL AND INSTALLATION .

    NO (Models with ICC) 

    Repair / replace harness or connector, and GO TO STEP 14  .

    NO (Models without ICC) 

    Repair / replace harness or connector, and GO TO STEP 15  .

  14. CHECK STOP LAMP SWITCH CIRCUIT (2) (MODELS WITH ICC)

    1. Turn the ignition switch OFF.
    2. Disconnect stop lamp switch harness connector.
    3. Disconnect resistor harness connector.
    4. Check the continuity between ABS actuator and electric unit (control unit) harness connector and stop lamp switch harness connector.
      ABS actuator and electric unit (control unit) Stop lamp switch Continuity
      Connector Terminal Connector Terminal
      E125 7 E38 4 Yes
    5. Check the continuity between ABS actuator and electric unit (control unit) harness connector and resistor harness connector.
      ABS actuator and electric unit (control unit) Resistor Continuity
      Connector Terminal Connector Terminal
      E125 7 E56 1 Yes
    6. Check the continuity between ABS actuator and electric unit (control unit) harness connector and the ground.
      ABS actuator and electric unit (control unit) - Continuity
      Connector Terminal
      E125 7 Ground No
    7. Check the continuity between resistor and the ground.
      Resistor - Continuity
      Connector Terminal
      E56 1 Ground No
      2 Yes

    Is the inspection result normal?

    YES 

    Replace the ABS actuator and electric unit (control unit). Refer to REMOVAL AND INSTALLATION .

    NO 

    Repair / replace harness or connector, and GO TO STEP 16  .

  15. CHECK STOP LAMP SWITCH CIRCUIT (2) (MODELS WITHOUT ICC)

    1. Turn the ignition switch OFF.
    2. Disconnect stop lamp switch harness connector.
    3. Check the continuity between ABS actuator and electric unit (control unit) harness connector and stop lamp switch harness connector.
      ABS actuator and electric unit (control unit) Stop lamp switch Continuity
      Connector Terminal Connector Terminal
      E125 7 E38 2 Yes
    4. Check the continuity between ABS actuator and electric unit (control unit) harness connector and the ground.
      ABS actuator and electric unit (control unit) - Continuity
      Connector Terminal
      E125 7 Ground No

    Is the inspection result normal?

    YES 

    Replace the ABS actuator and electric unit (control unit). Refer to REMOVAL AND INSTALLATION .

    NO 

    Repair / replace harness or connector, and GO TO STEP 16  .

  16. CHECK DATA MONITOR (5)

    G-20 With CONSULT

    1. Connect ABS actuator and electric unit (control unit) harness connector.
    2. Connect stop lamp switch harness connector.
    3. Connect resistor harness connector. (Models with ICC)
    4. Erase "Self Diagnostic Result" of "ABS"
    5. Turn the ignition switch OFF → ON → OFF.
      NOTE:

      Wait at least 10 seconds after turning ignition switch OFF or ON.

    6. Start the engine.
      NOTE:

      Stop the vehicle.

    7. Select "DATA MONITOR" of "ABS", check "STOP LAMP SW". Check that data monitor displays "On" or "Off" when brake pedal is depressed or released. Refer to REFERENCE VALUE .
    8. Select "DATA MONITOR" of "ABS", check "PRESS SENSOR". Check that data monitor displays "5 bar" or less when brake pedal is depressed. Refer to REFERENCE VALUE .

    Is the inspection result normal?

    YES 

    Inspection End.

    NO 

    Replace the ABS actuator and electric unit (control unit). Refer to REMOVAL AND INSTALLATION .

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