Nissan Maxima Service and Repair Manual: B2578, B2579 in-vehicle sensor

Nissan Maxima Service and Repair Manual / Ventilation, heater & air conditioner / Heater & air conditioning control system / DTC/circuit diagnosis / B2578, B2579 in-vehicle sensor

Description

In-vehicle Sensor

Nissan Maxima. Description

  • The in-vehicle sensor (1) is located on instrument lower cover (LH).
  • It converts variations in compartment air temperature drawn from the aspirator into a resistance value. It is then input into the A/C auto amp.

In-vehicle Sensor Circuit

Nissan Maxima. In-vehicle Sensor Circuit

Aspirator

Nissan Maxima. Aspirator

The aspirator (1) is located on driver side of heater & cooling unit assembly. It produces vacuum pressure due to air discharged from the heater & cooling unit assembly, continuously taking compartment air in the aspirator.

Nissan Maxima. Aspirator

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.

Diagnosis Procedure

1.CHECK IN-VEHICLE SENSOR POWER SUPPLY

  1. Disconnect in-vehicle sensor connector.
  2. Turn ignition switch ON.

    3. Check voltage between in-vehicle sensor harness connector M34 terminal 1 and ground.

Nissan Maxima. CHECK IN-VEHICLE SENSOR POWER SUPPLY

1 - Ground: Approx. 5V

2.CHECK CONTINUITY BETWEEN IN-VEHICLE SENSOR AND A/C AUTO AMP.

  1. Turn ignition switch OFF.
  2. Disconnect A/C auto amp. connector.
  3. Check continuity between in-vehicle sensor harness connector M34 (A) terminal 2 and A/C auto amp. harness connector M37 (B) terminal 37.

Nissan Maxima. CHECK CONTINUITY BETWEEN IN-VEHICLE SENSOR AND A/C AUTO AMP.

2 - 37: Continuity should exist.

3.CHECK IN-VEHICLE SENSOR

Check in-vehicle sensor.

4.CHECK CONTINUITY BETWEEN IN-VEHICLE SENSOR AND A/C AUTO AMP.

  1. Turn ignition switch OFF.
  2. Disconnect A/C auto amp. connector.
  3. Check continuity between in-vehicle sensor harness connector M34 (A) terminal 1 and A/C auto amp. harness connector M37 (B) terminal 36.

Nissan Maxima. CHECK CONTINUITY BETWEEN IN-VEHICLE SENSOR AND A/C AUTO AMP.

1 - 36: Continuity should exist.

  1. Check continuity between in-vehicle sensor harness connector M34 (A) terminal 1 and ground.

1 - Ground: Continuity should not exist.

Component Inspection

1.CHECK IN-VEHICLE SENSOR

  1. Turn ignition switch OFF.
  2. Disconnect in-vehicle sensor connector.
  3. Check resistance between in-vehicle sensor terminals.

Nissan Maxima. CHECK IN-VEHICLE SENSOR

    B257B, B257C ambient sensor
    Description COMPONENT DESCRIPTION Ambient Sensor The ambient sensor (1) is installed to the front bumper reinforcement. It detects ambient temperature and converts it into a resistance va ...

    B2581, B2582 intake sensor
    Description Intake Sensor The intake sensor is located on the evaporator. It converts air temperature after it passes through the evaporator into a resistance value which is then input to the ...

    Other materials:

    B2604 transmission range switch
    Description BCM confirms the shift position with the following 4 signals.  CVT selector lever  Transmission range switch  P position signal from IPDM E/R (CAN)  P position signal from TCM (CAN) DTC Logic DTC DETECTION LOGIC NOTE: I ...

    Precaution
    PRECAUTIONS Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER" The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front ...

    Magnet clutch
    Description SYSTEM DESCRIPTION A/C auto amp. controls A/C compressor operation by ambient temperature and signal from ECM. Low Temperature Protection Control A/C auto amp. will turn the A/C compressor ON or OFF as determined by a signal detected by ambient sensor. When ambient temper ...

    Nissan Maxima Owners Manual

    Nissan Maxima Service and Repair Manual

    © 2017-2026 Copyright www.nimainfo.com
    0.0082