Diagnostic Procedure

CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten two ground screws on the body. Refer to "GROUND INSPECTION ".
  
  Fig 1: Loosening Ground Screws On Body
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 2.
2. NG: Repair or replace ground connections.
CHECK ACCELERATOR PEDAL POSITION SENSOR 1 POWER SUPPLY CIRCUIT-I
1. Disconnect accelerator pedal position (APP) sensor 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 6 and ground with CONSULT-II or tester.
  Voltage: Approximately 5V
  
  Fig 3: Identifying Voltage Between APP Sensor Terminal 6 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 7.
2. NG: GO TO 3.
CHECK ACCELERATOR PEDAL POSITION SENSOR 1 POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between APP sensor terminal 6 and ECM terminal 90. Refer to WIRING DIAGRAM .
  Continuity should exist.
OK or NG
1. OK: GO TO 7.
2. NG: GO TO 4.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E11, F2
- Harness for open between ECM and APP sensor
  Repair open circuit.

CHECK SENSOR POWER SUPPLY CIRCUITS

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

WIRING DIAGRAM INDEX

ECM terminal	Sensor terminal	Reference Wiring Diagram
48	EVAP control system pressure sensor terminal 3	WIRING DIAGRAM
49	Refrigerant pressure sensor terminal 1	WIRING DIAGRAM
68	PSP sensor terminal 1	WIRING DIAGRAM
90	APP sensor terminal 6	WIRING DIAGRAM

OK or NG

CHECK COMPONENTS
Check the following.
- EVAP control system pressure sensor (Refer to "COMPONENT INSPECTION ".)
- Refrigerant pressure sensor (Refer to "COMPONENT INSPECTION ".)
- Power steering pressure sensor (Refer to "COMPONENT INSPECTION ".)
OK or NG
1. OK: GO TO 9.
2. NG: Replace malfunctioning component.
CHECK APP SENSOR
Refer to "COMPONENT INSPECTION ".

OK or NG
1. OK: GO TO 9.
2. 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 ".
  INSPECTION END
CHECK INTERMITTENT INCIDENT
Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

INSPECTION END