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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 679 (Security Control System (DTC/Circuit Diagnosis)) >> DTC/Circuit Diagnosis >> DTC B2555: Stop Lamp >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK BRAKE SWITCH FUNCTION 
    1. Turn ignition switch ON.
    2. Select "BRAKE SW1" and "BRAKE SW2" in DATA MONITOR mode of INTELLIGENT KEY with CONSULT.
    3. Check "BRAKE SW1" and "BRAKE SW2" indication under the following conditions.

      Monitor item

      Condition

      Indication

      BRAKE SW1

      Brake pedal

      Depressed

      OFF

      Released

      ON

      BRAKE SW2

      Brake pedal

      Depressed

      ON

      Released

      OFF

    Is the inspection result normal?

    YES

    Refer to Intermittent Incident .

    NO

    If BRAKE SW1 is incorrect. GO TO 2.

    NO

    If BRAKE SW2 is incorrect. GO TO 3.

  2. CHECK STOP LAMP SWITCH INPUT SIGNAL 1 
    1. Turn ignition switch OFF.
    2. Disconnect BCM connector.
    3. Check voltage between BCM harness connector and ground.

      (+)

      (-)

      Voltage (V)

      BCM

      Connector

      Terminal

      M18

      25

      Ground

      Battery voltage

    Is the inspection normal?

    YES

    GO TO 7.

    NO

    Check 10 A fuse [No. 10, located in the fuse block (J/B)].

    NO

    Check harness for open or short between BCM and fuse.

  3. CHECK STOP LAMP SWITCH INPUT SIGNAL 2 
    1. Disconnect BCM connector M18.
    2. Check voltage between BCM harness connector and ground.

      (+)

      (-)

      Condition

      Voltage (V)

      BCM

      Connector

      Terminal

      M18

      27

      Ground

      Brake pedal

      Depressed

      Battery voltage

      Not depressed

      0

    Is the inspecting result normal?

    YES

    GO TO 7.

    NO

    GO TO 4.

  4. CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT 
    1. Disconnect stop lamp switch connector.
    2. Check voltage between stop lamp switch harness connector and ground.

      (+)

      (-)

      Voltage (V)

      Stop lamp switch

      Connector

      Terminal

      E38

      1

      Ground

      Battery voltage

    Is the inspection result normal?

    YES

    GO TO 5.

    NO

    Check harness for open or short between stop lamp switch and fuse.

  5. CHECK STOP LAMP SWITCH CIRCUIT 
    1. Check continuity between stop lamp switch harness connector and BCM harness connector.

      Stop lamp switch

      BCM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      E38

      2

      M18

      27

      Yes

    2. Check 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 6.

    NO

    Repair or replace harness.

  6. CHECK STOP LAMP SWITCH 

    Refer to Component Inspection .

    Is the inspection result normal?

    YES

    GO TO 9.

    NO

    Replace stop lamp switch. Refer to Exploded View .

  7. CONNECTOR INSPECTION 

    Check BCM connectors and terminals for deformation, disconnection, looseness or damage.

    Is the inspection result normal?

    YES

    GO TO 8.

    NO

    Repair or replace as necessary.

  8. REPLACE BCM 
    1. Replace BCM. Refer to Removal and Installation .
    2. Perform initialization of BCM and registration of all Intelligent Keys using CONSULT.

    Inspection End.

  9. CHECK INTERMITTENT INCIDENT 

    Refer to Intermittent Incident .

    Inspection End.