Nissan Maxima Service and Repair Manual: Magnet clutch

Nissan Maxima Service and Repair Manual / Ventilation, heater & air conditioner / Heater & air conditioning control system / DTC/circuit diagnosis / 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 temperature is greater than 4C (39F), the A/C compressor turns ON. The A/C compressor turns OFF when ambient temperature is less than 2.5C (37F).

Nissan Maxima. SYSTEM DESCRIPTION

Component Function Check

1.FUNCTION INSPECTIONS

  1. Press AUTO switch. AUTO is indicated on the display.
  2. Press the A/C switch.
  3. Check that the indicator of the A/C switch turns on. Check visually and by sound that the A/C compressor is operating. (The discharge air temperature or fan speed varies depending on the ambient temperature, in-vehicle temperature, and temperature setting.)
  4. Press the A/C switch again.
  5. Check that the indicator of the A/C switch turns OFF. Check visually and by sound that the A/C compressor stops.

Diagnosis Procedure

Nissan Maxima. Diagnosis Procedure

SYMPTOM: Magnet clutch does not engage when A/C switch is ON.

1.INSPECTION IN AUTO ACTIVE TEST MODE

Perform "AUTO ACTIVE TEST".

2.CHECK POWER SUPPLY FOR A/C COMPRESSOR

  1. Turn ignition switch OFF.
  2. Disconnect A/C compressor connector.
  3. Start engine and press A/C switch.
  4. Check voltage between A/C compressor harness connector F3 terminal 1 and ground.

Nissan Maxima. CHECK POWER SUPPLY FOR A/C COMPRESSOR

3.CHECK FUSE

Check 10A fuse (No. 41) located in IPDM E/R.

4.CHECK CIRCUIT CONTINUITY BETWEEN A/C RELAY IN IPDM E/R AND A/C COMPRESSOR

  1. Turn ignition switch OFF.
  2. Disconnect IPDM E/R connector F10 and A/C compressor connector F3.
  3. Check continuity between A/C compressor harness connector F3 (A) terminal 1 and IPDM E/R harness connector F10 (B) terminal 48.

Nissan Maxima. CHECK CIRCUIT CONTINUITY BETWEEN A/C RELAY IN IPDM E/R AND A/C COMPRESSOR

1 - 48: Continuity should exist.

5.CHECK A/C COMPRESSOR CIRCUIT FOR SHORT

Check continuity between A/C compressor harness connector F3 terminal 1 and ground.

Nissan Maxima. CHECK A/C COMPRESSOR CIRCUIT FOR SHORT

1 - Ground: Continuity should not exist.

6.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.

7.CHECK A/C AUTO AMP. INPUT SIGNAL

Using CONSULT, check "On/Off" of "COMP REQ SIG" and "FAN REQ SIG" in "DATA MONITOR" of HVAC.

A/C SWITCH ON: COMP REQ SIG On
A/C SWITCH OFF: COMP REQ SIG Off
FAN CONTROL DIAL ON: FAN REQ SIG On
FAN CONTROL DIAL OFF: FAN REQ SIG Off

8.CHECK REFRIGERANT PRESSURE SENSOR

Check refrigerant pressure sensor.

    Blower motor
    Description COMPONENT DESCRIPTION Brush-less Motor The blower motor utilizes a brush-less motor with a rotating magnet. Quietness is improved over previous motors where the brush was the point ...

    A/C switch assembly signal circuit
    Diagnosis Procedure 1.CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT Using CONSULT, perform "SELF-DIAGNOSIS RESULTS" of HVAC. Check if any DTC No. is displayed in the self-diagnosis results. ...

    Other materials:

    C1142 press sen circuit
    Description The pressure sensor converts the brake fluid pressure to an electric signal and transmits it to the ABS actuator and electric unit (control unit). (The pressure sensor is integrated in the ABS actuator and electric unit (control unit).) DTC Logic DTC DETECTION LOGIC DTC C ...

    CVT fluid
    Inspection CHECKING CVT FLUID The fluid level should be checked with the fluid warmed up to 50 to 80C (122 to 176F). The fluid level check procedure is as follows:  Check for fluid leakage.  With the engine warmed up, drive the vehicle in an urban area. When amb ...

    On board diagnostic (OBD) system
    Trouble Diagnosis Introduction CAUTION: Do not use electrical test equipment on any circuit related to the SRS unless instructed to do so inthis Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harness connectors. Do not attempt to repair, splice or modify ...

    Nissan Maxima Owners Manual

    Nissan Maxima Service and Repair Manual

    © 2017-2025 Copyright www.nimainfo.com
    0.0118