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 MODE DOOR MOTOR POWER SUPPLY
1. Turn ignition switch ON.
2. Check voltage between mode door motor harness connector M127 terminal 1 and ground.
  1 - Ground: Battery Voltage
  
  Fig 1: Checking Voltage Between Mode Door Motor Harness Connector M127 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 MODE DOOR MOTOR

Confirm A/C LAN signal between mode door motor harness connector M127 terminal 3 and ground using an oscilloscope.

TERMINAL VOLTAGE CHART

(+)		(-)	Voltage
Mode door motor		-
Connector	Terminal	-
M127	3	Ground	Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Checking A/C LAN Signal Between Mode Door Motor Harness Connector M127 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 MODE DOOR MOTOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect mode door motor connector.
3. Check continuity between mode door motor harness connector M127 terminal 2 and ground.
  2 - Ground: Continuity should exist.
Is the inspection result normal?

YES: Replace mode door motor. Refer to "MODE DOOR MOTOR: REMOVAL AND INSTALLATION ".

NO: Repair harness or connector.

Fig 3: Checking Continuity Between Mode Door Motor Harness Connector M127 Terminal 2 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.