Diagnostic Procedure

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

   Refer to " GROUND INSPECTION  "  .

   Fig 1: Locating Three 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.

1. Check voltage between ECM terminal 3 and ground under the following conditions with CONSULT-II or tester.
   ECM CONNECTOR TERMINAL VOLTAGE SPECIFICATION
   
   

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

   Fig 2: Checking Voltage Between ECM Terminal 3

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

OK or NG 

1. OK: GO TO  10.
2. NG: GO TO 3.

1. Turn ignition switch OFF.
2. Disconnect throttle control motor relay harness connector.
   Fig 3: Disconnecting Throttle Control Motor Relay Harness Connector

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check voltage between throttle control motor relay terminals 2, 3 and ground with CONSULT-II or tester.
   1. Voltage: Battery voltage 

OK or NG 

1. OK: GO TO  5.
2. NG: GO TO 4.

Fig 4: Checking Voltage Between Throttle Control Motor Relay Terminals 2, 3

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

Check the following.

• 15A fuse
• Harness for open or short between throttle control motor relay and battery
  1. Repair or replace harness or connectors.

1. Disconnect ECM harness connector.
2. Check continuity between ECM terminal 3 and throttle control motor relay terminal 5. Refer to WIRING DIAGRAM .
   1. Continuity should exist. 
3. Also check harness for short to ground and short to power.

OK or NG 

1. OK: GO TO  7.
2. NG: GO TO 6.

Check the following.

• Harness connectors E32, F32
• Harness for open or short between ECM and throttle control motor relay
  1. Repair open circuit or short to ground or short to power in harness or connectors.

1. Check continuity between ECM terminal 104 and throttle control motor relay terminal 1. Refer to WIRING DIAGRAM .
   1. Continuity should exist. 
2. Also check harness for short to ground and short to power.

OK or NG 

1. OK: GO TO  9.
2. NG: GO TO 8.

Check the following.

• Harness connectors E33, F33
• Harness for open or short between ECM and throttle control motor relay
  1. Repair open circuit or short to ground or short to power in harness or connectors.

Refer to " COMPONENT INSPECTION  "  .

OK or NG 

1. OK: GO TO  13.
2. NG: Replace throttle control motor relay.

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 5: Disconnecting Electric Throttle Control Actuator Harness Connector

   Courtesy of NISSAN MOTOR CO., U.S.A.
   Fig 6: Electric Throttle Control Actuator Connector Continuity Specification

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

OK or NG 

1. OK: GO TO 11.
2. NG: Repair or replace.

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

OK or NG 

1. OK: GO TO 12.
2. NG: Remove the foreign matter and clean the electric throttle control actuator inside.

Fig 7: Checking Throttle Valve

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

Refer to " COMPONENT INSPECTION  "  .

OK or NG 

1. OK: GO TO 13.
2. NG: GO TO  14.

Refer to " TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT  "  .

OK or NG 

1. OK: GO TO 14.
2. 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  "  .
   1. INSPECTION END