Diagnostic Procedure

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

Fig 1: Locating Ground Screws Of Body

Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

• OK: GO TO 2.
• NG: Repair or replace ground connections.

1. Check voltage between ECM terminal 3 and ground under the following conditions with CONSULT-II or tester.
   ECM TERMINAL 3 VOLTAGE SPECIFICATION - THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I (WITH CONSULT-II)
   
   

   Ignition switch	Voltage
   OFF	Approximately 0V
   ON	Battery voltage (11 -14V)

Fig 2: Checking Voltage Between ECM Terminal Connector 3 And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

• OK: GO TO  9.
• NG: GO TO 3.

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Disconnect IPDM E/R harness connector E119.
4. Check continuity between ECM terminal 3 and IPDM E/R terminal 6. Refer to WIRING DIAGRAM .
   • Continuity should exist. 
5. Also check harness for short to ground and short to power.

OK or NG 

• OK: GO TO  5.
• NG: GO TO 4.

Check the following.

• Harness connectors E2, F32
• Harness for open or short between ECM and IPDM E/R
  • Repair open circuit or short to ground or short to power in harness or connectors.

1. Reconnect all harness connectors disconnected.
2. Turn ignition switch OFF.
3. Check voltage between ECM terminal 104 and ground with CONSULT-II or tester.
   • Voltage: Battery voltage 

Fig 3: Checking Voltage Between ECM Connector Terminal 104 And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

• OK: GO TO  9.
• NG: GO TO 6.

1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector E122.
3. Check continuity between ECM terminal 104 and IPDM E/R terminal 47. 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 7.
• NG: Repair open circuit or short to ground or short to power in harness or connectors.

1. Disconnect 20A fuse.
2. Check 20A fuse for blown.

OK or NG 

• OK: GO TO 8.
• NG: Replace 20A fuse.

Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

OK or NG 

• OK: Replace IPDM E/R. Refer to IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM) .
• NG: Repair or replace harness or connectors.

1. Turn ignition switch OFF.
2. Disconnect electric throttle control actuator harness connector.
3. Disconnect ECM harness connector.
4. Check harness continuity between the following terminals. Refer to WIRING DIAGRAM .
   Fig 4: Electric Throttle Control Actuator Terminals Continuity Detail Chart

   Courtesy of NISSAN MOTOR CO., U.S.A.
   Fig 5: Identifying Electric Throttle Control Actuator

   Courtesy of NISSAN MOTOR CO., U.S.A.
5. Also check harness for short to ground and short to power.

OK or NG 

• OK: GO TO 10.
• NG: Repair or replace.

1. Remove the intake air duct.
2. Check if foreign matter is caught between the throttle valve and the housing.

Fig 6: Identifying Throttle Valve And Electric Throttle Control Actuator

Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

• OK: GO TO 11.
• NG: Remove the foreign matter and clean the electric throttle control actuator inside.

Refer to COMPONENT INSPECTION .

OK or NG 

• OK: GO TO 12.
• NG: GO TO  13.

Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

OK or NG 

• OK: GO TO 13.
• NG: Repair or replace harness or connectors.

1. Replace the electric throttle control actuator.
2. Perform THROTTLE VALVE CLOSED POSITION LEARNING .
3. Perform IDLE AIR VOLUME LEARNING .
   • : INSPECTION END