Inspection Procedure

Check self-diagnosis results.

Is the above displayed in the self-diagnosis display items? 

YES: GO TO 2.

NO: INSPECTION END

1. Disconnect stop lamp switch connector and VDC/TCS/ABS control unit connector and check the terminals for deformation, disconnection, looseness, and so on. If there is an error, repair or replace the terminal.
2. Securely reconnect the connectors.
3. Start engine.
4. Repeat pumping brake pedal carefully several times, then perform self-diagnosis again.

Is the result of self-diagnosis normal? 

YES: The connector terminal contact is loose, damaged, open or shorted.

NO: GO TO 3.

1. Turn ignition switch OFF and disconnect stop lamp switch connector E111.
2. Disconnect stop lamp switch connector
3. Check continuity between stop lamp switch connector terminal 3 and 4.
   STOP LAMP SWITCH CONTINUITY CHART
   
   

   Stop lamp switch	Condition	Continuity
   3 - 4	Release stop lamp switch (When brake pedal is depressed.)	Yes
   	Push stop lamp switch (When brake pedal is released.)	No

   Fig 1: Checking Continuity Between Stop Lamp Switch Connector Terminal 3 And 4

   Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

OK: GO TO 4.

NG: Replace stop lamp switch. Refer to "COMPONENTS ".

1. Turn ignition switch OFF and disconnect VDC/TCS/ABS control unit connector B114.
2. Check voltage between VDC/TCS/ABS control unit connector B114 terminal 48 and ground.
   Fig 2: Checking Voltage Between VDC/TCS/ABS Control Unit Connector E118 Terminal 48 And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.
   VDC/TCS/ABS CONTROL UNIT VOLTAGE CHART
   
   

   VDC/TCS/ABS control unit	Ground	Measurement condition	Voltage
   48	-	Brake pedal depressed.	Battery voltage (Approx. 12 V)
   		Brake pedal not depressed.	Approx. 0 V

OK or NG 

OK: GO TO 5.

NG: Open or short in harness. Repair or replace the harness.

1. Disconnect VDC actuator connector E50 and VDC/TCS/ABS control unit connector, check terminals for deformation, disconnection, looseness, and so on. If there is an error, repair or replace the terminal.
2. Reconnect the connectors and then perform self-diagnosis.

Is the result of self-diagnosis normal? 

YES: The connector terminal contact is loose, damaged, open or shorted.

NO: GO TO 6.

1. Turn ignition switch OFF and disconnect VDC actuator connector E50 and VDC/TCS/ABS control unit connector B114.
2. Check continuity between VDC/TCS/ABS control unit connector and VDC actuator connector.
   VDC/TCS/ABS CONTROL UNIT CONTINUITY CHART
   
   

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

   Fig 3: Checking Continuity Between VDC/TCS/ABS Control Unit Connector And VDC Actuator Connector

   Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

OK: GO TO 7.

NG: If the open or short in harness, repair or replace the harness.

1. Connect VDC actuator and VDC/TCS/ABS control unit connectors.
2. Conduct "DATA MONITOR" of the "PRESS SENSOR" to check if the status is normal.
   DATA MONITOR DISPLAY CHART
   
   

   Condition	Data monitor display
   When brake pedal is depressed.	-40 - 300 bar
   When brake pedal is released.	Approx. 0 bar

OK or NG 

OK: INSPECTION END

NG: If the pressure sensor is damaged or malfunctioning, replace the VDC actuator (pressure sensor it built in).