LEMON Manuals: Even more car manuals for everyone
Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 543 (Heater & Air Conditioning Control System (DTC/Circuit Diagnosis)) >> DTC/Circuit Diagnosis >> Magnet Clutch >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

WARNING: This page is about a different car, the 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.

The IPDM E/R provides a ground to energize the A/C relay. When the A/C relay is energized, voltage is supplied to the A/C compressor magnet clutch. The magnet clutch is permanently grounded.

In order for the IPDM E/R to complete a A/C compressor ON request, the following conditions must be met:

  1. The BCM detects a Fan ON signal from the front air control. The front air control grounds the fan ON signal monitored by the BCM when the blower speed dial is in any of the fan speed positions.
  2. The BCM detects an A/C ON signal from the front air control. The front air control grounds the A/C ON signal monitored by the BCM when:
    • The A/C switch is pressed. The A/C switch LED illuminates and the front air control grounds the A/C ON signal monitored by the BCM. Any mode control button except D/F may be selected.
    • The A/C switch is OFF, and the MAX A/C button is pressed. The A/C switch LED will automatically illuminate and the front air control grounds the A/C ON signal monitored by the BCM.
    • The A/C switch is OFF, and the mode button for either D/F or DEF is selected. The front air control grounds the A/C ON signal monitored by the BCM, but it does not illuminate the A/C switch LED
  3. The intake temperature value must be within the specified range.
NOTE: If the A/C compressor was engaged by pressing the D/F or DEF mode buttons, and the time spent in either mode exceeds 1 minute, then the A/C compressor stays requested, even when modes other than D/F or DEF are selected, until either:
  1. The ignition switch is turned OFF.
  2. The blower speed dial is turned completely counterclockwise to the OFF position.
  3. The A/C switch is manually turned OFF.

In other words, the A/C compressor ON request cannot be turned off in D/F or DEF modes.

  1. CHECK FUSE 
    1. Turn ignition switch OFF.
    2. Check 10 A fuse (No. 42, located in IPDM E/R).
      NOTE: Refer to appropriate system Wiring Diagram.

    Is the inspection result normal?

    YES

    GO TO 2.

    NO

    Replace the blown fuse after repairing the affected circuit.

  2. CHECK MAGNET CLUTCH POWER SUPPLY CIRCUIT 
    1. Disconnect A/C compressor connector and IPDM E/R connector.
    2. Check continuity between A/C compressor harness connector and IPDM E/R harness connector.

      A/C compressor

      IPDM E/R

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F3

      1

      E119

      11

      Yes

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    Repair harness or connector.

  3. CHECK MAGNET CLUTCH 

    Directly apply battery voltage to the magnet clutch. Check operation visually and by sound.

    Does it operate normally?

    YES

    Replace IPDM E/R. Refer to Removal and Installation .

    NO

    Replace magnet clutch. Refer to Removal and Installation for Compressor Clutch - VK56VD .

scientia non olet · About LEMON Manuals