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 INTAKE DOOR MOTOR POWER SUPPLY
1. Turn ignition switch ON.
2. Check voltage between intake door motor harness connector M126 terminal 1 and ground.
  1 - Ground: Battery Voltage
  
  Fig 1: Checking Voltage Between Intake Door Motor Harness Connector M126 Terminal 1 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
Is the inspection result normal?

YES: GO TO 2.

NO: Repair harness or connector.

CHECK SIGNAL FOR INTAKE DOOR MOTOR

Confirm A/C LAN signal between intake door motor harness connector M126 terminal 3 and ground using an oscilloscope.

TERMINAL VOLTAGE CHART

(+)		(-)	Voltage
Intake door motor		-
Connector	Terminal	-
M126	3	Ground	Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Checking A/C LAN Signal Between Intake Door Motor Harness Connector M126 Terminal 3 And Ground

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

Is the inspection result normal?

YES: GO TO 3.

NO: Repair harness or connector.

CHECK INTAKE DOOR MOTOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect intake door motor connector.
3. Check continuity between intake door motor harness connector M126 terminal 2 and ground.
  2 - Ground: Continuity should exist.
Is the inspection result normal?

YES: Replace intake door motor. Refer to "INTAKE DOOR MOTOR: REMOVAL AND INSTALLATION ".

NO: Repair harness or connector.

Fig 3: Checking Continuity Between Intake Door Motor Harness Connector M126 Terminal 2 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.