Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Titan XD and 2018 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.

CHECK THROTTLE POSITION SENSOR 1 POWER SUPPLY CIRCUIT-I

Disconnect electric throttle control actuator harness connector.
Turn ignition switch ON.

Check the voltage between electric throttle control actuator harness connector and ground.

Electric throttle control actuator		Ground	Voltage (V)
Connector	Terminal
F50	2	Ground	Approx. 5

Is the inspection result normal?

YES

GO TO 2 .

Repair open circuit, short to ground or short to power in harness or connectors.

CHECK THROTTLE POSITION SENSOR 1 GROUND CIRCUIT FOR OPEN AND SHORT

Turn ignition switch OFF.
Disconnect ECM harness connector.

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

Electric throttle control actuator		ECM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
F50	4	F79	85	Existed

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

Is the inspection result normal?

YES

GO TO 3 .

Repair open circuit, short to ground or short to power in harness or connectors.

CHECK THROTTLE POSITION SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

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

Electric throttle control actuator		ECM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
F50	1	F79	78	Existed

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

Is the inspection result normal?

YES

GO TO 4 .

Repair open circuit, short to ground or short to power in harness or connectors.

CHECK THROTTLE POSITION SENSOR
Refer to Component Inspection (Throttle Position Sensor) .

Is the inspection result normal?

YES

INSPECTION END

NO

GO TO 5 .
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
Replace electric throttle control actuator. Refer to Removal and Installation .

INSPECTION END