Diagnosis Procedure (Front Pressure Sensor)

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

1. CONNECTOR INSPECTION 
   1. Turn the ignition switch OFF.
   2. Disconnect the front pressure sensor connector and ABS actuator and electric unit (control unit) connector and inspect the terminals for deformation, disconnection, looseness, or damage.

      Is the inspection result normal? 

      YES: GO TO 2

      NO: Repair connector.

2. FRONT PRESSURE SENSOR CIRCUIT INSPECTION 
   1. Measure the continuity between the ABS actuator and electric unit (control unit) connector E125 (A) and front pressure sensor connector E31 (B).

      ABS actuator and electric unit (control unit)		Front pressure sensor		Continuity
      Connector	Terminal	Connector	Terminal
      E125 (A)	18	E31 (B)	3	Yes
      	19		1
      	20		2

      Fig 1: Measuring Front Pressure Sensor Circuit Continuity

      Courtesy of NISSAN NORTH AMERICA, INC.
   2. Measure the continuity between the ABS actuator and electric unit (control unit) connector E125 (A) and body ground.

      ABS actuator and electric unit (control unit)		-	Continuity
      Connector	Terminal
      E125 (A)	18	Ground	No
      	19
      	20

      Is the inspection result normal? 

      YES: GO TO 3

      NO: Repair or replace harness or connector.

3. FRONT PRESSURE SENSOR INSPECTION 
   1. Reconnect the front pressure sensor and ABS actuator and electric unit (control unit) connectors.
   2. Perform PRESS SENSOR component inspection. Refer to "COMPONENT INSPECTION (FRONT PRESSURE SENSOR) ".

      Is the inspection result normal? 

      YES: Inspection End.

      NO: Replace the front pressure sensor.