Nissan Maxima Service and Repair Manual: B2636, B2637, B2638, B2639, B2654, B2655 mode door motor

Description

COMPONENT DESCRIPTION

Mode Door Motor

  • The mode door motor (1) is attached to the heater & cooling unit assembly.
  • It rotates so that air is discharged from the outlet set by the A/C auto amp. Motor rotation is conveyed to a link which activates the mode door

Nissan Maxima. COMPONENT DESCRIPTION

DTC Logic

DTC DETECTION LOGIC

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

Nissan Maxima. DTC DETECTION LOGIC

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 MODE switch and DEF switch.
  2. Each position indicator should change shape.
  3. Confirm that air discharge comes out according to the air distribution table. Refer to HAC-9, "Description".

NOTE: Confirm that the compressor clutch is engaged (sound or visual inspection) and intake door position is at FRE ( ) when DEF ( ) or D/F ( ) is selected.

Diagnosis Procedure

1.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.

Nissan Maxima. CHECK MODE DOOR MOTOR POWER SUPPLY

1 - Ground: Battery Voltage

2.CHECK SIGNAL FOR MODE DOOR MOTOR

Nissan Maxima. 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.

Nissan Maxima. CHECK SIGNAL FOR MODE DOOR MOTOR

3.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.

Nissan Maxima. CHECK MODE DOOR MOTOR GROUND CIRCUIT

2- Ground: Continuity should exist.

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    Nissan Maxima Owners Manual

    Nissan Maxima Service and Repair Manual

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