Diagnosis Procedure

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

1. CONNECTOR INSPECTION 
   1. Turn ignition switch OFF.
   2. Disconnect ABS actuator and electric unit (control unit) connector.
   3. Check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal.
   4. Reconnect connectors and then perform the self-diagnosis. Refer to "CONSULT FUNCTION (ABS) ".

      Is any item indicated on the self-diagnosis display? 

      YES: GO TO 2

      NO: Poor connection of connector terminal. Repair or replace connector.

2. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY CIRCUIT AND GROUND CIRCUIT 
   1. Turn ignition switch OFF.
   2. Disconnect ABS actuator and electric unit (control unit) connector.
   3. Turn ignition switch ON or OFF and check voltage between ABS actuator and electric unit (control unit) connector E125 terminal 4 and ground.

      ABS actuator and electric unit (control unit)		-	Condition	Voltage
      Connector	Terminal
      E125	4	Ground	Ignition switch: ON	Battery voltage
      			Ignition switch: OFF	Approx. 0V

      Fig 1: Checking Voltage Between ABS Actuator & Electric Unit & Ground

      Courtesy of NISSAN NORTH AMERICA, INC.
   4. Turn ignition switch OFF.
   5. Check continuity between ABS actuator and electric unit (control unit) connector E125 terminals 16, 47 and ground.

      ABS actuator and electric unit (control unit)		-	Continuity
      Connector	Terminal
      E125	16, 47	Ground	Yes

      Fig 2: Checking Ground Circuit Continuity

      Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: Check battery for terminal looseness, low voltage, etc. If any malfunction is found, repair malfunctioning parts.

      NO: Repair or replace malfunctioning components.