Diagnostic Procedure

WARNING: This page is about a different car, the 2004 Nissan Murano. However, it is still accessible from the selected car via links, so may be relevant.

RETIGHTEN GROUND SCREWS
1. Turn ignition switch OFF.
2. Loosen and retighten engine ground screws.
  1. GO TO 2.
    
    Fig 1: Loosening And Retighten Engine Ground Screws
    Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor harness connector.
2. Turn ignition switch ON.
  
  Fig 2: Disconnecting Accelerator Pedal Position (APP) Sensor Harness Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check voltage between APP sensor terminals 4 and ground with CONSULT-II or tester.
  Voltage: Approximately 5V
  
  OK or NG
  1. OK: GO TO 3.
  2. NG: Repair open circuit or short to ground or short to power in harness or connectors.
    
    Fig 3: Checking Voltage Between APP Sensor Terminals 4 And Ground
    Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-I
Check voltage between APP sensor terminal 2 and ground with CONSULT-II or tester.

Voltage: Approximately 5V

OK or NG
1. OK: GO TO 8.
2. NG: Repair open circuit or short to ground or short to power in harness or connectors.
  
  Fig 4: Checking Voltage Between APP Sensor Terminal 2 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 2 and ECM terminal 91. Refer to WIRING DIAGRAM .
  Continuity should exist.
  
  OK or NG
  1. OK: GO TO 5.
  2. 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 the following.
- Harness for short to power and short to ground, between the following terminals.
  
  Fig 5: Terminal Specification
  Courtesy of NISSAN MOTOR CO., U.S.A.
- ECM pin terminal.
  OK or NG
  1. OK: GO TO 6.
  2. NG: Repair short to ground or short to power in harness or connectors.
CHECK THROTTLE POSITION SENSOR
Refer to "COMPONENT INSPECTION ".

OK or NG
1. OK: GO TO 12.
2. NG: GO TO 7.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace electric throttle control actuator.
2. Perform "THROTTLE VALVE CLOSED POSITION LEARNING ".
3. Perform "IDLE AIR VOLUME LEARNING ".
  1. INSPECTION END
CHECK APP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between APP sensor terminal 3 and ECM terminal 83, APP sensor terminal 5 and ECM terminal 82.
  Refer to WIRING DIAGRAM .
  
  Continuity should exist.
4. Also check harness for short to ground and short to power.
  OK or NG
  1. OK: GO TO 9.
  2. NG: Repair open circuit or short to power or short to power in harness or connectors.
CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
- Check harness continuity between ECM terminal 106 and APP sensor terminal 1, ECM terminal 98 and APP sensor terminal 6.
  Refer to WIRING DIAGRAM .
  
  Continuity should exist.
- Also check harness for short to ground and short to power.
  OK or NG
  1. OK: GO TO 10.
  2. 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
1. OK: GO TO 11.
2. NG: Replace accelerator pedal assembly.
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 ".
  1. INSPECTION END
CHECK INTERMITTENT INCIDENT
Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".
1. INSPECTION END