Nissan Maxima Service and Repair Manual: B263D, B263E, B263F intake door motor

Description

COMPONENT DESCRIPTION

Intake Door Motor

• The intake door motor (1) is attached to the blower unit.
• It rotates so that air is drawn from inlets set by the A/C auto amp.

  Motor rotation is conveyed to a lever which activates the intake door.

DTC Logic

DTC DETECTION LOGIC

NOTE: If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010.

DTC CONFIRMATION PROCEDURE

1.CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT

1. Using CONSULT, perform "SELF-DIAGNOSIS RESULTS" of HVAC.
2. Check if any DTC No. is displayed in the self-diagnosis results.

NOTE: If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010.

2.FUNCTION INSPECTION

1. Press the REC ( ) switch, indicator is turned ON.
2. Listen for intake door position change. (Slight change of blower sound can be heard.)
3. Press the FRE ( ) switch, indicator is turned ON.
4. Listen for intake door position change. (Slight change of blower sound can be heard.)

Diagnosis Procedure

1.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

2.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.

3.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.