Diagnosis Procedure

WARNING: This page is about a different car, the 2013 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

CONNECTOR INSPECTION
1. Disconnect the ABS actuator and electric unit (control unit) connector and stop lamp switch connector.
2. Check the terminals for deformation, disconnection, looseness or damage.
  Is the inspection result normal?
  
  YES: GO TO 2
  
  NO: Repair or replace as necessary.
STOP LAMP SWITCH INSPECTION
1. Connect the stop lamp switch connector.
2. Check the voltage between the ABS actuator and electric unit (control unit) connector E125 terminal 41 and body ground.
  Brake pedal depressed: Battery voltage (approx. 12V)
  
  Brake pedal released: Approx. 0V
  
  Is the inspection result normal?
  
  YES: Perform self-diagnosis again. If the same results appear, replace ABS actuator and electric unit (control unit). Refer to "REMOVAL AND INSTALLATION ".
  
  NO: GO TO 3
STOP LAMP RELAY CIRCUIT INSPECTION
1. Disconnect the stop lamp relay connector.
2. Check the continuity between the ABS actuator and electric unit (control unit) connector E125 (B) terminal 41 and stop lamp relay connector E12 (A) terminal 4.
  Continuity should exist.
  
  Fig 1: Checking Stop Lamp Relay Circuit Continuity
  Courtesy of NISSAN NORTH AMERICA, INC.
  
  Is the inspection result normal?
  
  YES: Refer to "WORK FLOW ".
  
  NO: Repair or replace malfunctioning components.