Diagnosis Procedure

1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body.

Refer to "GROUND INSPECTION ".

Fig 1: Checking Ground Connections

Courtesy of NISSAN NORTH AMERICA, INC.

OK or NG 

OK: GO TO 2.

NG: Repair or replace ground connections.

Check voltage between ECM terminal 2 and ground under the following conditions with CONSULT or tester.

Fig 2: Checking Throttle Control Motor Relay Input Signal Circuit-I

Courtesy of NISSAN NORTH AMERICA, INC.

OK or NG 

OK: GO TO  10.

NG: GO TO 3.

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Disconnect IPDM E/R harness connector E43.
4. Check continuity between ECM terminal 2 and IPDM E/R terminal 8. 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 E17, F10
• 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. Check voltage between ECM terminal 15 and ground with CONSULT or tester.

Voltage: Battery voltage 

Fig 3: Checking Throttle Control Motor Relay Power Supply Circuit-I

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OK or NG 

OK: GO TO  9.

NG: GO TO 6.

1. Disconnect ECM harness connector.
2. Disconnect IPDM E/R harness connector E46.
3. Check harness continuity between ECM terminal 15 and IPDM E/R terminal 46. 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: GO TO 7.

Check the following.

• Harness connectors E3, F2
• 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. Disconnect 15 A fuse. For the fuse number, refer to "WIRING DIAGRAM ". For the fuse arrangement, refer to , "IPDM E/R TERMINAL ARRANGEMENT ".
2. Check if 15 A fuse is blown.

OK or NG 

OK: GO TO 9.

NG: Replace 15A 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 (1) harness connector.
   • ←: Vehicle front
3. Disconnect ECM harness connector.
4. Check harness continuity between the following terminals. Refer to Wiring Diagram .

   Electric throttle control actuator terminal	ECM terminal	Continuity
   5	5	Should not exist.
   	6	Should exist.
   6	5	Should exist.
   	6	Should not exist.

   Fig 4: Identifying Electric Throttle Control Actuator

   Courtesy of NISSAN NORTH AMERICA, INC.
5. Also check harness for short to ground and short to power.

OK or NG 

OK: GO TO 11.

NG: Repair or replace.

1. Remove the intake air duct. Refer to , "REMOVAL AND INSTALLATION ".
2. Check if foreign matter is caught between the throttle valve (1) and the housing.

• ←: Vehicle front
• Electric throttle control actuator (2)

Fig 5: Identifying Throttle Valve And Electric Throttle Control Actuator

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OK or NG 

OK: GO TO 12.

NG: Remove the foreign matter and clean the electric throttle control actuator inside, and then perform throttle valve closed position learning. Refer to "THROTTLE VALVE CLOSED POSITION LEARNING ".

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 13.

NG: GO TO  14.

Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

OK or NG 

OK: GO TO 14.

NG: Repair or replace harness or connectors.

Replace the electric throttle control actuator. Refer to , "REMOVAL AND INSTALLATION ".

INSPECTION END