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Diagnosis Procedure

CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body.
Refer to "GROUND INSPECTION ".

Fig 1: Identifying Body Ground (M70 And M16)
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: GO TO 2.

NG: Repair or replace ground connections.
CHECK ACCELERATOR PEDAL POSITION SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor (1) harness connector.
2. Turn ignition switch ON.
  
  Fig 2: Identifying Accelerator Pedal Position (APP) Sensor Harness Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check voltage between APP sensor terminal 4 and ground with CONSULT-III or tester.
Voltage: Approximately 5 V

OK or NG

OK: GO TO 5.

NG: GO TO 3.

Fig 3: Checking Voltage Between APP Sensor Terminal 4 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

CHECK SENSOR POWER SUPPLY CIRCUITS

Check harness for short to power and short to ground, between the following terminals.

ECM CONNECTOR TERMINALS REFERENCE CHART

ECM terminal	Sensor terminal	Reference Wiring Diagram
90	APP sensor terminal 4	"WIRING DIAGRAM "
48	EVAP control system pressure sensor terminal 3	"WIRING DIAGRAM "
49	Refrigerant pressure sensor terminal 1	"WIRING DIAGRAM "
49	Battery current sensor terminal 1	"WIRING DIAGRAM "
68	PSP sensor terminal 1	"WIRING DIAGRAM "

OK or NG

OK: GO TO 4.

NG: Repair short to ground or short to power in harness or connectors.

CHECK COMPONENTS
Check the following.
- EVAP control system pressure sensor (Refer to "COMPONENT INSPECTION ".)
- Refrigerant pressure sensor (Refer to "DIAGNOSIS PROCEDURE ".)
- Battery current sensor (Refer to "COMPONENT INSPECTION ".)
- Power steering pressure sensor (Refer to "COMPONENT INSPECTION ".)
OK or NG

OK: GO TO 7.

NG: Replace malfunctioning component.
CHECK APP SENSOR
Refer to "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 7.

NG: GO TO 6.
REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Perform "ACCELERATOR PEDAL RELEASED POSITION LEARNING ".
3. Perform "THROTTLE VALVE CLOSED POSITION LEARNING ".
4. Perform "IDLE AIR VOLUME LEARNING ".
INSPECTION END
CHECK INTERMITTENT INCIDENT
Refer to "DIAGNOSIS PROCEDURE ".

INSPECTION END