Pressure Sensor System

INSPECTION PROCEDURE

1. CHECK SELF-DIAGNOSTIC RESULTS 

   Check the self-diagnostic results.

   SELF-DIAGNOSTIC RESULTS
   
   

   Self-diagnostic results
   PRESS SEN CIRCUIT

   Is above displayed on self-diagnosis display? 

   1. YES: GO TO 2.
   2. NO: INSPECTION END
2. CHECK CONNECTOR 
   1. Turn ignition switch OFF and disconnect VDC actuator (pressure sensor) connector and VDC/TCS/ABS control unit connector. Then reconnect them securely.
   2. Perform VDC/TCS/ABS control unit self-diagnosis again.

      OK or NG 

      1. OK: Poor connection of connectors. Repair or replace suspect connector. Perform self-diagnosis again.
      2. NO: GO TO 3.
3. CHECK PRESSURE SENSOR CIRCUIT 
   1. Turn ignition switch OFF and disconnect VDC actuator (pressure sensor) connector and VDC/TCS/ABS control unit connector.
   2. Check continuity between VDC/TCS/ABS control unit harness connector M93 and VDC actuator (pressure sensor) harness connector E50.
   CONTINUITY CONDITIONS
   
   

   VDC/TCS/ABS control unit	Pressure sensor	Continuity
   69	30	Yes
   68	31
   67	32

   OK or NG 

   1. OK: GO TO 4.
   2. NG: Open or short in harness. Repair or replace the suspect harness.
   Fig 1: Identifying Continuity Between Harness Connector M93 And Harness Connector E50

   Courtesy of NISSAN MOTOR CO., U.S.A.
4. CHECK PRESSURE SENSOR 
   1. Connect VDC actuator (pressure sensor) connector and VDC/TCS/ABS control unit connector.
   2. Check pressure sensor value on "DATA MONITOR".
   PRESSURE SENSOR VALUE
   
   

   Condition	Data monitor display
   Brake pedal depressed	Positive value
   When brake pedal is released.	Approx. 0 bar

   OK or NG 

   1. OK: Perform VDC/TCS/ABS control unit self-diagnosis again.
   2. NG: Pressure sensor malfunction. Replace VDC actuator (inside pressure sensor).