Diagnostic Procedure

CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten four ground screws on the body.
  Refer to "GROUND INSPECTION ."
  
  Fig 1: Checking Ground Connections
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: GO TO 2.

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

OK: GO TO 7.

NG: GO TO 3.
CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between APP sensor terminal 2 and ECM terminal 90. Refer to Wiring Diagram.
  Continuity should exist .
OK or NG

OK: GO TO 5.

NG: GO TO 4.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E25, M90
- Harness for open or short between ECM and accelerator pedal position sensor.

CHECK SENSOR POWER SUPPLY CIRCUITS

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

SENSOR TERMINAL SPECIFICATION

ECM terminal	Sensor terminal	Reference
48	EVAP control system pressure sensor terminal 3	WIRING DIAGRAM
49	Refrigerant pressure sensor terminal 1	WIRING DIAGRAM
68	PSP sensor terminal 3	WIRING DIAGRAM
90	APP sensor terminal 2	WIRING DIAGRAM

OK or NG

OK: GO TO 6.

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 "REFRIGERATION SYSTEM .")
- Power steering pressure sensor (Refer to "COMPONENT INSPECTION .")
OK or NG

OK: GO TO 9.

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

OK or NG

OK: GO TO 9.

NG: GO TO 8.
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 ."
CHECK INTERMITTENT INCIDENT
Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ."

>> INSPECTION END