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Home >> Nissan-Datsun >> 2016 >> Maxima S >> Repair and Diagnosis >> External Pages >> Different car >> Section 16 (Driver Assistance System (ADAS Control Unit)) >> ADAS Control Unit >> DTC/Circuit Diagnosis >> DTC C1A13: Stop Lamp Relay >> Diagnosis Procedure
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Diagnosis Procedure

WARNING: This page is about a different car, the 2015 Nissan Murano. However, it is still accessible from the selected car via links, so may be relevant.

Regarding Wiring Diagram information, refer to WIRING DIAGRAM .

  1. CHECK DTC PRIORITY

    If DTC "C1A13" is displayed with DTC "U1000", first diagnose the DTC "U1000".

    Is applicable DTC detected?

    YES 

    Perform diagnosis of applicable. Refer to DTC DESCRIPTION .

    NO 

    GO TO STEP 2  .

  2. CHECK STOP LAMP SWITCH

    CONSULT

    1. Select "Data Monitor" mode of "ICC/ADAS".
    2. Select "STOP LAMP SW".
    3. Check that the function operates normally according to the following conditions:
    Monitor item Condition Status
    STOP LAMP SW When brake pedal is applied ON
    When brake pedal is released OFF

    Is the inspection result normal?

    YES 

    GO TO STEP 10. 

    NO 

    GO TO STEP 3  .

  3. CHECK STOP LAMP SWITCH INSTALLATION

    1. Turn ignition switch OFF.
    2. Check stop lamp switch for correct installation. Refer to INSPECTION .

    Is the inspection result normal?

    YES 

    GO TO STEP 4. 

    NO 

    Adjust stop lamp switch installation. Refer to ADJUSTMENT .

  4. CHECK STOP LAMP SWITCH

    Check stop lamp switch. Refer to COMPONENT INSPECTION (STOP LAMP SWITCH) .

    Is the inspection result normal?

    YES 

    GO TO STEP 5. 

    NO 

    Replace stop lamp switch. Refer to EXPLODED VIEW .

  5. CHECK STOP LAMP FOR ILLUMINATION

    1. Remove ICC brake hold relay.
    2. Check that the stop lamp is illuminated by depressing the brake pedal to turn the stop lamp ON.

    Is the inspection result normal?

    YES 

    GO TO STEP 6. 

    NO 

    Check the stop lamp circuit, and repair or replace the malfunctioning parts.

  6. CHECK HARNESS BETWEEN STOP LAMP SWITCH AND ECM

    1. Turn the ignition switch OFF.
    2. Disconnect stop lamp switch, ECM, rear combination lamp, and high-mounted stop lamp connectors.
    3. Check for continuity between the stop lamp switch harness connector and the ECM harness connector.
      Stop lamp switch ECM Continuity
      Connector Terminal Connector Terminal
      E38 2 E32 139 Yes
    4. Check for continuity between stop lamp switch harness connector and ground.
      Stop lamp switch Ground Continuity
      Connector Terminal
      E38 2 No

    Is the inspection result normal?

    YES 

    GO TO STEP 7. 

    NO 

    Repair the harnesses or connectors.

  7. CHECK ICC BRAKE HOLD RELAY CIRCUIT

    1. Connect ICC brake hold relay, ECM, rear combination lamp, and high-mounted stop lamp connectors.
    2. Check that the stop lamp does not illuminate when brake pedal is not depressed.

    Is the inspection result normal?

    YES 

    GO TO STEP 9. 

    NO 

    GO TO STEP 8. 

  8. CHECK ICC BRAKE HOLD RELAY

    1. Remove ICC brake hold relay.
    2. Check ICC brake hold relay. Refer to COMPONENT INSPECTION .

    Is the inspection result normal?

    YES 

    GO TO STEP 9. 

    NO 

    Replace ICC brake hold relay.

  9. PERFORM SELF-DIAGNOSIS OF ECM

    CONSULT

    1. Connect all connectors again if the connectors are disconnected.
    2. Turn ignition switch ON.
    3. Perform "All DTC Reading".
    4. Check if any DTC is detected in "Self Diagnostic Result" of "ENGINE". Refer to DTC INDEX .

    Is any DTC detected?

    YES 

    Repair or replace the malfunctioning parts identified by the self-diagnosis result.

    NO 

    Replace ADAS control unit. Refer to REMOVAL AND INSTALLATION .

  10. CHECK ICC BRAKE HOLD RELAY POWER SUPPLY CIRCUIT

    1. Turn ignition switch OFF.
    2. Remove ICC brake hold relay.
    3. Check the voltage between ICC brake hold relay harness connector and ground.
      Terminal Voltage
      (Approx.)
      (+) (-)
      ICC brake hold relay Ground
      Connector Terminal
      E75 2 Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 11. 

    NO 

    Repair or replace ICC brake hold relay power supply circuit.

  11. CHECK HARNESS BETWEEN AND ICC BRAKE HOLD RELAY AND ADAS CONTROL UNIT

    1. Disconnect ADAS control unit connectors.
    2. Check for continuity between ICC brake hold relay harness connector and ADAS control unit harness connector.
      ICC brake hold relay ADAS control unit Continuity
      Connector Terminal Connector Terminal
      E75 1 M182 14 Yes
    3. Check for continuity between ICC brake hold relay harness connector and ground.
      ICC brake hold relay Ground Continuity
      Connector Terminal
      E75 1 No

    Is the inspection result normal?

    YES 

    GO TO STEP 12. 

    NO 

    Repair the harnesses or connectors.

  12. CHECK ADAS CONTROL UNIT STANDARD VOLTAGE

    CONSULT

    1. Connect all connectors again if the connectors are disconnected.
    2. Select "STOP LAMP" in "Active Test" mode of "ICC/ADAS".
    3. Perform "Active Test and check the voltage between ADAS control unit harness connector and ground.
      Terminal Condition Voltage
      (Approx.)
      (+) (-)
      ADAS control unit Ground Active Test item
      "STOP LAMP"
      Connector Terminal
      M182 14 OFF Battery voltage
      ON 0 V

    Is the inspection result normal?

    YES 

    GO TO STEP 13. 

    NO 

    Replace ADAS control unit. Refer to REMOVAL AND INSTALLATION .

  13. CHECK ICC BRAKE HOLD RELAY POWER SUPPLY CIRCUIT

    1. Turn ignition switch OFF.
    2. Check the voltage between ICC brake hold relay harness connector and ground.
      Terminal Voltage
      (Approx.)
      (+) (-)
      ICC brake hold relay Ground
      Connector Terminal
      E75 5 Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 14. 

    NO 

    Repair or replace ICC brake hold relay power supply circuit.

  14. CHECK HARNESS BETWEEN ICC BRAKE HOLD RELAY AND ECM

    1. Disconnect ECM, rear combination lamp, and high-mounted stop lamp connectors and remove ICC brake hold relay.
    2. Check for continuity between ICC brake hold relay harness connector and ECM harness connector.
      ICC brake hold relay ECM Continuity
      Connector Terminal Connector Terminal
      E75 3 E32 139 Yes
    3. Check for continuity between ICC brake hold relay harness connector and ground.
      ICC brake hold relay Ground Continuity
      Connector Terminal
      E75 3 No

    Is the inspection result normal?

    YES 

    GO TO STEP 15. 

    NO 

    Repair the harnesses or connectors.

  15. CHECK ICC BRAKE HOLD RELAY

    1. Remove ICC brake hold relay.
    2. Check ICC brake hold relay. Refer to COMPONENT INSPECTION .

    Is the inspection result normal?

    YES 

    GO TO STEP 16. 

    NO 

    Replace ICC brake hold relay.

  16. CHECK STOP LAMP SWITCH

    CONSULT

    1. Select "Data Monitor" mode of "ICC/ADAS".
    2. Select "STOP LAMP SW".
    3. Check that the function operates normally according to the following conditions:
    Monitor item Condition Status
    STOP LAMP SW When brake pedal is applied ON
    When brake pedal is released OFF

    Is the inspection result normal?

    YES 

    GO TO STEP 21. 

    NO 

    GO TO STEP 17  .

  17. CHECK STOP LAMP SWITCH INSTALLATION

    Check stop lamp switch for correct installation. Refer to INSPECTION .

    Is the inspection result normal?

    YES 

    GO TO STEP 18. 

    NO 

    Adjust stop lamp switch installation. Refer to ADJUSTMENT .

  18. CHECK STOP LAMP SWITCH

    Check stop lamp switch. Refer to COMPONENT INSPECTION (STOP LAMP SWITCH) .

    Is the inspection result normal?

    YES 

    GO TO STEP 19. 

    NO 

    Replace stop lamp switch. Refer to EXPLODED VIEW .

  19. CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT

    Check the voltage between stop lamp switch harness connector and ground.

    Terminal Voltage
    (Approx.)
    (+) (-)
    Stop lamp switch Ground
    Connector Terminal
    E38 1 Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 20. 

    NO 

    Repair or replace stop lamp switch power supply circuit.

  20. CHECK HARNESS BETWEEN STOP LAMP SWITCH AND ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

    1. Turn the ignition switch OFF.
    2. Disconnect stop lamp switch and ABS actuator and electric unit (control unit).
    3. Check for continuity between the stop lamp switch harness connector and the ABS actuator and electric unit (control unit) harness connector.
      Stop lamp switch ABS actuator and electric unit (control unit) Continuity
      Connector Terminal Connector Terminal
      E38 4 E130 7 Yes
    4. Check for continuity between stop lamp switch harness connector and ground.
      Stop lamp switch Ground Continuity
      Connector Terminal
      E38 4 No

    Is the inspection result normal?

    YES 

    GO TO STEP 21. 

    NO 

    Repair the harnesses or connectors.

  21. PERFORM SELF-DIAGNOSIS OF ECM

    CONSULT

    1. Connect all connectors again if the connectors are disconnected.
    2. Turn ignition switch ON.
    3. Perform "All DTC Reading".
    4. Check if any DTC is detected in "Self Diagnostic Result" of "ENGINE". Refer to DTC INDEX .

    Is any DTC detected?

    YES 

    Repair or replace the malfunctioning parts identified by the self-diagnosis result.

    NO 

    GO TO STEP 22. 

  22. PERFORM SELF-DIAGNOSIS OF ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

    CONSULT

    1. Connect all connectors again if the connectors are disconnected.
    2. Turn ignition switch ON.
    3. Perform "All DTC Reading".
    4. Check if any DTC is detected in "Self Diagnostic Result" of "ABS". Refer to DTC INDEX .

    Is any DTC detected?

    YES 

    Repair or replace the malfunctioning parts identified by the self-diagnosis result.

    NO 

    Replace ADAS control unit. Refer to REMOVAL AND INSTALLATION .

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