Diagnosis Procedure

WARNING: This page is about a different car, the 2009 Nissan Maxima. 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 E9. 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 connectors.

VOLTAGE SPECIFICATION

ECM				Condition	Voltage
+		-
Connector	Terminal	Connector	Terminal
F14	2	E10	112	Ignition switch OFF	Approx. 0 V
F14	2	E10	112	Ignition switch ON	Battery voltage

Fig 1: Checking Voltage Between ECM Harness Connectors

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

Is the inspection result normal?

YES: GO TO 7.

NO: GO TO 3.

CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-II

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

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

CONTINUITY CHART

IPDM E/R		ECM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
F10	70	F14	15	Existed

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

Is the inspection result normal?

YES: GO TO 4.

NO: 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.

CONTINUITY CHART

IPDM E/R		ECM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
F10	54	F14	2	Existed

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

Is the inspection result normal?

YES: GO TO 5.

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

CHECK FUSE
1. Disconnect 15 A fuse (No. 43) from IPDM E/R.
2. Check if 15 A fuse is blown.
Is the inspection result normal?

YES: GO TO 6.

NO: Replace 15 A fuse.
CHECK INTERMITTENT INCIDENT
Refer to "INTERMITTENT INCIDENT ".

Is the inspection result normal?

YES: Replace IPDM E/R.

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.

CONTINUITY CHART

Electric throttle control actuator		ECM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
F57	5	F14	5	Not existed
	5		6	Existed
	6		5	Existed
	6		6	Not existed

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

Is the inspection result normal?

YES: GO TO 8.

NO: Repair or replace malfunctioning part.

CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Remove the intake air duct.
2. Check if foreign matter is caught between the throttle valve (1) and the housing.
Fig 2: Identifying Throttle Valve And Electric Throttle Control Actuator
Courtesy of NISSAN MOTOR CO., U.S.A.

Is the inspection result normal?

YES: GO TO 9.

NO: Remove the foreign matter and clean the electric throttle control actuator inside.
CHECK THROTTLE CONTROL MOTOR
Refer to "COMPONENT INSPECTION ".

Is the inspection result normal?

YES: GO TO 10.

NO: GO TO 11.
CHECK INTERMITTENT INCIDENT
Refer to "INTERMITTENT INCIDENT ".

Is the inspection result normal?

YES: GO TO 11.

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