Toyota
Dodge Durango
 Service Manual
Heating and Air Conditioning » Diagnosis and testing
Compressor clutch coil

RELAY TEST

The compressor clutch relay (Fig. 8) is located in the Power Distribution Center (PDC). Refer to the PDC label for relay identification and location.

Remove the relay from the PDC to perform the following tests: (1) A relay in the de-energized position should have continuity between terminals 87A and 30, and no continuity between terminals 87 and 30. If OK, go to Step 2. If not OK, replace the faulty relay.

(2) Resistance between terminals 85 and 86 (electromagnet) should be 75 +- 5 ohms. If OK, go to Step 3. If not OK, replace the faulty relay.

(3) Connect a battery to terminals 85 and 86.

There should now be continuity between terminals 30 and 87, and no continuity between terminals 87A and 30. If OK, see Relay Circuit Test in the Diagnosis and Testing section of this group. If not OK, replace the faulty relay.

RELAY CIRCUIT TEST

For circuit descriptions and diagrams, refer to 8W-42 - Air Conditioning/Heater in Group 8W - Wiring Diagrams.

(1) The relay common feed terminal cavity (30) is connected to fused battery feed. There should be bat-tery voltage at the cavity for relay terminal 30 at all times. If OK, go to Step 2. If not OK, repair the open circuit to the fuse in the PDC as required.

(2) The relay normally closed terminal (87A) is not used in this application. Go to Step 3.

(3) The relay normally open terminal cavity (87) is connected to the compressor clutch coil. There should be continuity between this cavity and the A/C compressor clutch relay output circuit cavity of the compressor clutch coil wire harness connector. If OK, go to Step 4. If not OK, repair the open circuit as required.

(4) The relay coil battery terminal (86) is connected to the fused ignition switch output (run/start) circuit. There should be battery voltage at the cavity for relay terminal 86 with the ignition switch in the On position. If OK, go to Step 5. If not OK, repair the open circuit to the fuse in the junction block as required.

(5) The coil ground terminal cavity (85) is switched to ground through the Powertrain Control Module (PCM). There should be continuity between this cavity and the A/C compressor clutch relay control circuit cavity of the PCM wire harness connector C (gray) at all times. If not OK, repair the open circuit as required.

Fig. 8 Compressor Clutch Relay Fig. 8 Compressor Clutch Relay

    More about «Diagnosis and testing»:

    A/c performance

    Blower motor

    Blower motor relay

    Blower motor resistor

    Blower motor switch

    Compressor

    Compressor clutch coil

    Electronic cycling clutch switch (front unit only)

    Heater-a/c control

    Heater performance

    Dual function high pressure switch/high pressure cut-off switch

    Low pressure cut-off switch

    Refrigerant system leaks

    Refrigerant system service equipment

    Vacuum system

    Dodge Durango Service Manual / Heating and Air Conditioning / Diagnosis and testing / Compressor clutch coil

    Dodge Durango Service Manual

    Categories


    © 2017-2019 Copyright www.dodurango.net
    0.0046