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 Ground Connections Components
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  OK or NG
  
  OK : GO TO 2.
  
  NG : Repair or replace ground connections.
CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor (1) harness connector.
2. Turn ignition switch ON.
  
  Fig 2: Identifying 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 5V
  
  OK or NG
  
  OK : GO TO 3.
  
  NG : Repair open circuit or short to ground or short to power in harness or connectors.
  
  Fig 3: Checking Voltage Between APP Sensor Terminal 4 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-I
1. Turn ignition switch ON.
2. Check voltage between APP sensor terminal 5 and ground with CONSULT-III or tester.
  Voltage: Approximately 5V
  
  OK or NG
  
  OK : GO TO 7.
  
  NG : GO TO 4.
  
  Fig 4: Checking Voltage Between APP Sensor Terminal 5 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between APP sensor terminal 5 and ECM terminal 102.
  Refer to Wiring Diagram.
  
  Continuity should exist .
  
  OK or NG
  
  OK : GO TO 5.
  
  NG : Repair open circuit or short to ground or short to power in harness or connectors.

CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-III

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

ECM TERMINAL CHART

ECM terminal	Sensor terminal	Reference Wiring Diagram
74	Refrigerant pressure sensor terminal 3	"WIRING DIAGRAM "
75	Crankshaft position sensor (POS) terminal 1	"WIRING DIAGRAM "
76	EVAP control system pressure sensor terminal 3	"WIRING DIAGRAM "
102	APP sensor terminal 5	"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.
- Crankshaft position sensor (POS) (Refer to "COMPONENT INSPECTION ").
- EVAP control system pressure sensor (Refer to "COMPONENT INSPECTION ").
- Refrigerant pressure sensor (Refer to TROUBLE DIAGNOSIS ).
  OK or NG
  
  OK : GO TO 11.
  
  NG : Replace malfunctioning component.
CHECK APP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between the following;
  ECM terminal 111 and APP sensor terminal 2,
  
  ECM terminal 104 and APP sensor terminal 1.
  
  Refer to Wiring Diagram.
  
  Continuity should exist .
4. Also check harness for short to ground and short to power.
  OK or NG
  
  OK : GO TO 8.
  
  NG : Repair open circuit or short to ground or short to power in harness or connectors.
CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between the following;
  ECM terminal 110 and APP sensor terminal 3,
  
  ECM terminal 103 and APP sensor terminal 6.
  
  Refer to Wiring Diagram.
  
  Continuity should exist .
2. Also check harness for short to ground and short to power.
  OK or NG
  
  OK : GO TO 9.
  
  NG : Repair open circuit or short to ground or short to power in harness or connectors.
CHECK APP SENSOR
Refer to "COMPONENT INSPECTION ".

OK or NG

OK : GO TO 11.

NG : GO TO 10.
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