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 AIR MIX DOOR MOTOR RH COMMUNICATION SIGNAL

Turn ignition switch ON.

Check output waveform between front air mix door motor RH harness connector and ground with oscilloscope.

(+)		(-)	Output waveform
Air mix door motor RH
Connector	Terminal
M229	3	Ground	Courtesy of NISSAN NORTH AMERICA, INC.

Is the inspection result normal?

YES

GO TO 2 .

GO TO 3 .

CHECK INSTALLATION OF AIR MIX DOOR MOTOR RH
Check air mix door motor RH is properly installed. Refer to Exploded View .

Is the inspection result normal?

YES

Replace air mix door motor RH. Refer to Removal and Installation - Air Mix Door Motor RH .

NO

Repair or replace malfunctioning part.

CHECK AIR MIX DOOR MOTOR RH COMMUNICATION SIGNAL CIRCUIT

Turn ignition switch OFF.
Disconnect air mix door motor RH connector and A/C auto amp. connector.

Check continuity between air mix door motor RH harness connector and A/C auto amp. harness connector.

Air mix door motor RH		A/C auto amp.		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M229	3	M137	16	Yes

Is the inspection result normal?

YES

Replace A/C auto amp. Refer to Removal and Installation .

Repair harness or connector.