Diagnosis Procedure

WARNING: This page is about a different car, the 2013 Infiniti FX50. However, it is still accessible from the selected car via links, so may be relevant.

CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection M95. Refer to Ground Inspection in "CIRCUIT INSPECTION ".
  Is the inspection result normal?
  
  YES: GO TO 2.
  
  NO: Repair or replace ground connection.

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I

Check the voltage between ECM harness connector terminals as per the following.

DTC	ECM				Condition	Voltage (V)
	+		-
	Connector	Terminal	Connector	Terminal
P1233	F110	1	M160	128	Ignition switch OFF	Approx. 0
P1233	F110	1			Ignition switch ON	Battery voltage
P2101	F111	49			Ignition switch OFF	Approx. 0
P2101	F111	49			Ignition switch ON	Battery voltage

Is the inspection result normal?

YES: GO TO 9.

NO: GO TO 3.

CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT

Turn ignition switch OFF.
Disconnect ECM harness connector.
Disconnect IPDM E/R harness connector E7.

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

IPDM E/R		ECM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
E7	70	F110	19	Existed

Also check harness for short to ground and short to power.
Is the inspection result normal?

YES: GO TO 5.

NO: GO TO 4.

DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E10, F10
- Harness for open or short between ECM and IPDM E/R
  : Repair open circuit, short to ground or short to power in harness or connectors.

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II

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

DTC	IPDM E/R		ECM		Continuity
DTC	Connector	Terminal	Connector	Terminal	Continuity
P1233	E7	54	F110	1	Existed
P2101	E7	54	F111	49	Existed

Also check harness for short to ground and short to power.
Is the inspection result normal?

YES: GO TO 7.

NO: GO TO 6.

DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E10, F10
- Harness for open or short between ECM and IPDM E/R
  : Repair open circuit, short to ground or short to power in harness or connectors.
CHECK FUSE
1. Disconnect 15 A fuse (No. 51) from IPDM E/R.
2. Check if 15 A fuse is blown.
  Is the inspection result normal?
  
  YES: GO TO 8.
  
  NO: Replace 15 A fuse.
CHECK INTERMITTENT INCIDENT
Refer to "INTERMITTENT INCIDENT ".

Is the inspection result normal?

YES: Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION ".

NO: Repair or replace harness or connectors.

CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR SHORT

Turn ignition switch OFF.
Disconnect electric throttle control actuator harness connector.
Disconnect ECM harness connector.

Check the continuity between electric throttle control actuator harness connector and ECM harness connector.

DTC	Electric throttle control actuator			ECM		Continuity
DTC	Bank	Connector	Terminal	Connector	Terminal	Continuity
P1233	2	F64	5	F110	2	Not existed
			5		5	Existed
			6		2	Existed
			6		5	Not existed
P2101	1	F66	5	F111	50	Not existed
			5		53	Existed
			6		50	Existed
			6		53	Not existed

Also check harness for short to ground and short to power.
Is the inspection result normal?

YES: GO TO 10.

NO: Repair or replace malfunctioning part.

CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Remove the intake air duct. Refer to "EXPLODED VIEW ".
2. Check that no foreign matter is caught between the throttle valve (1) and the housing.
  Is the inspection result normal?
  
  YES: GO TO 11.
  
  NO: 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: SPECIAL REPAIR REQUIREMENT ".
  
  Fig 1: Identifying Throttle Valve
  Courtesy of NISSAN NORTH AMERICA, INC.
CHECK THROTTLE CONTROL MOTOR
Refer to "COMPONENT INSPECTION ".

Is the inspection result normal?

YES: GO TO 12.

NO: GO TO 13.
CHECK INTERMITTENT INCIDENT
Refer to "INTERMITTENT INCIDENT ".

Is the inspection result normal?

YES: GO TO 13.

NO: Repair or replace harness or connectors.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace malfunction electric throttle control actuator.
2. Perform "SPECIAL REPAIR REQUIREMENT ".
  : INSPECTION END