Diagnosis Procedure

1. Check the voltage between ECM harness connector terminals.

   ECM				Condition	Voltage
   +		-
   Connector	Terminal	Condition	Terminal
   F51	34	E16	128	Ignition switch OFF	Approx. 0 V
   				Ignition switch ON	Battery voltage

   Is the inspection result normal? 

   YES: GO TO  4.

   NO: GO TO 2.

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Disconnect IPDM E/R harness connector.
4. Check the continuity between IPDM E/R harness connector and ECM harness connector.

   IPDM E/R		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   F19	57	F51	1	Existed

5. Also check harness for short to ground and short to power.

   Is the inspection result normal? 

   YES: GO TO 3.

   NO: Repair open circuit, short to ground or short to power in harness or connectors.

1. Check the continuity between IPDM E/R harness connector and ECM harness connector.

   IPDM E/R		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   F24	65	F51	34	Existed

2. Also check harness for short to ground and short to power.

   Is the inspection result normal? 

   YES: Perform the trouble diagnosis for power supply circuit.

   NO: Repair open circuit, short to ground or short to power in harness or connectors.

1. Turn ignition switch OFF.
2. Disconnect electric throttle control actuator harness connector.
3. Disconnect ECM harness connector.
4. Check the continuity between electric throttle control actuator harness connector and ECM harness connector.

   Electric throttle control actuator		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   F50	5	F51	5	Not existed
   			2	Existed
   	6		5	Existed
   			2	Not existed

5. Also check harness for short to ground and short to power.

   Is the inspection result normal? 

   YES: GO TO 5.

   NO: Repair or replace malfunctioning part.

1. Remove the intake air duct. Refer to "EXPLODED VIEW ".
2. Check if foreign matter is caught between the throttle valve (1) and the housing.
   • Electric throttle control actuator (2)
   • ←: Vehicle front

   Is the inspection result normal? 

   YES: GO TO 6.

   NO: Remove the foreign matter and clean the electric throttle control actuator inside, refer to "EXPLODED VIEW ", and then perform throttle valve closed position learning. Refer to "DESCRIPTION ".

   Fig 1: Locating Throttle Valve And Electric Throttle Control Actuator

   Courtesy of NISSAN NORTH AMERICA, INC.

Check throttle control motor. Refer to "COMPONENT INSPECTION ".

Is the inspection result normal? 

YES: GO TO 7.

NO: Replace electric throttle control actuator. Refer to "EXPLODED VIEW ".

Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

Is the inspection result normal? 

YES: Replace electric throttle control actuator. Refer to "EXPLODED VIEW ".

NO: Repair or replace error-detected parts.