Nissan Maxima Service and Repair Manual: 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:

    ECM branch line circuit
    Diagnosis Procedure 1.CHECK CONNECTOR  Turn the ignition switch OFF.  Disconnect the battery cable from the negative terminal.  Check the following terminals and connectors for damage, bend and loose connection (unit side and connector side). &nb ...

    BSW driving situations
    Illustration 1 - Approaching from behind Indicator on Indicator off Indicator flashing Another vehicle approaching from behind Illustration 1: The side BSW/RCTA indicator light illuminates if a vehicle enters the detection zone from behind in an adjacent lane. Illustration 2 - ...

    TCS
    System Diagram System Description Traction Control System is a function that electronically controls engine torque and brake fluid pressure to ensure the optimum slippage ratio at drive wheels by computing wheel speed signals from 4 wheel sensors. When ABS actuator and electric u ...

    Nissan Maxima Owners Manual

    Nissan Maxima Service and Repair Manual

    © 2017-2022 Copyright www.nimainfo.com
    0.0119