Nissan Maxima Service and Repair Manual: B2634, B2635 air mix door motor (passenger side)

Description

COMPONENT DESCRIPTION

Air Mix Door Motor (passenger side)

  • The air mix door motor (passenger side) (1) is attached to the heater & cooling unit assembly.
  • It rotates so that the air mix door is opened or closed to a position set by the A/C auto amp.
  • Motor rotation is then conveyed through a shaft and the air mix door position feedback is then sent to the A/C auto amp. by PBR built-in air mix door motor.

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 the temperature control switch (passenger side) until 32C (90F) is displayed.
  2. Check for warm air at discharge air outlets.
  3. Operate the A/C compressor.
  4. Press the temperature control switch (passenger side) until 18C (60F) is displayed.
  5. Check for cool air at air discharge outlets.

Diagnosis Procedure

1.CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) POWER SUPPLY

  1. Turn ignition switch ON.
  2. Check voltage between air mix door motor (passenger side) harness connector M129 terminal 1 and ground.

Nissan Maxima. CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) POWER SUPPLY

1 - Ground:Battery Voltage

2.CHECK SIGNAL FOR AIR MIX DOOR MOTOR (PASSENGER SIDE)

Nissan Maxima. CHECK SIGNAL FOR AIR MIX DOOR MOTOR (PASSENGER SIDE)

Check the output waveform (LAN signal) between air mix door motor (passenger side) harness connector M129 terminal 3 and ground using an oscilloscope.

Nissan Maxima. CHECK SIGNAL FOR AIR MIX DOOR MOTOR (PASSENGER SIDE)

3.CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) GROUND CIRCUIT

  1. Turn ignition switch OFF.
  2. Disconnect air mix door motor (passenger side) connector.
  3. Check continuity between air mix door motor (passenger side) harness connector M129 terminal 2 and ground.

Nissan Maxima. CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) GROUND CIRCUIT

2 - Ground: Continuity should exist.

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