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HOMESERVICE MANUALSJEEP2023GRAND CHEROKEE TRAILHAWK 4XEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 54 (5.7L - DTCS P0462 TO P0585)DTC TROUBLESHOOTINGP0480 COOLING FAN 1 CONTROL CIRCUIT/OPENDIAGNOSTIC TEST
2023 Jeep Grand Cherokee Trailhawk 4xe

Diagnostic Test

2023 Jeep Grand Cherokee Trailhawk 4xeSECTION Diagnostic Test
WARNING: This page is about a different variant/trim than selected.
  1. CHECK FOR AN ACTIVE CONDITION 
    1. Turn the ignition on.
    2. With a scan tool, select Radiator Cooling Fan Control State to actuate the Cooling Fan.

      Is the Cooling Fan operating?

      Yes 

      No 

      • Go To  2
  2. CHECK THE (A13) FUSED B+ CIRCUIT FOR HIGH RESISTANCE BY LOAD TESTING THE CIRCUIT 
    1. Disconnect the component harness connector to isolate the 12.0 volt supply circuit.
    2. Connect the positive lead of the load test tool to the 12.0 volt supply circuit at the component harness connector (A). Note:  refer to the diagram below.
    3. Connect the negative lead of the load test tool to the ground circuit of the Battery or a good chassis ground.
    4. Ensure that the circuit being tested is being powered on. If the 12.0 volt circuit being tested is an ignition feed for example, the ignition must be on. If testing an output from a relay, verify that the relay is energized and on.
    5. The bulb on the load test tool should be illuminated and bright if there is no resistance in the circuitry.
    NOTE:

    Note: Why load test a circuit?  A load test is used to determine if a circuit is capable of carrying the amperage needed to perform properly. The 3156 bulb in the load tool illustrated, is a simple but effective method of testing circuit functionality. A 3156 Bulb has approximately 6.0 Ohms of resistance when the bulb is powered  and draws approximately 2.0 amps of current. Read the CIRCUIT LOAD TESTING PROCEDURE for information on building a simple load test tool and for additional load testing information and alternative methods of load testing or voltage drop testing a circuit. Refer to: CIRCUIT LOAD TESTING PROCEDURES .

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.