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Home >> Jeep >> 2025 >> Grand Cherokee Laredo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 13 (Battery Pack Control Module (BPCM) - Pre-Diagnostic Troubleshooting Procedure, Intermittent Condition And Verification Test) >> Standard Procedure >> Intermittent Condition >> Diagnostic Test
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Diagnostic Test

WARNING: This page is about a different car, the 2025 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

INTERMITTENT DTC 

WARNING:

On vehicles equipped with the high voltage system, you must thoroughly read and follow all High Voltage Safety procedures. In addition, before performing any diagnostic or service procedure near a high voltage component, you must perform the High Voltage Power Down. Failure to follow these instructions may result in possible serious or fatal injury.

Read the HIGH-VOLTAGE SAFETY PROCEDURES. 

When the HIGH-VOLTAGE POWER-DOWN PROCEDURE is necessary, refer to  HIGH VOLTAGE POWER DOWN  . 

  1. The conditions necessary to set this DTC are not present at this time.
  2. Review the scan tool environmental data. If possible, try to duplicate the conditions under which the DTC set.
  3. If applicable, actuate the component with the scan tool.
  4. Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.
  5. Look for the data to change, the actuation to be interrupted, or for the DTC to reset during the wiggle test.
  6. Perform any Technical Service Bulletins (TSBs) that may apply.
  7. Turn the ignition off.
  8. Visually inspect the related wire harness. Disconnect all the related harness connectors. Look for any chafed, pierced, pinched, partially broken wires and broken, bent, pushed out, or corroded terminals.
  9. Perform a voltage drop test on the related circuits between the suspected component and the BPCM.
  10. Inspect and clean all BPCM and chassis grounds that are related to the most current DTC.
  11. If numerous trouble codes were set, use a schematic and inspect any common ground or supply circuits.
  12. Use the scan tool to perform a System Test if one applies to the component.
  13. A co-pilot, data recorder, and/or lab scope should be used to help diagnose intermittent conditions.

    Were any problems found during the above inspections?

    Yes 

    • Perform the necessary repairs.
    • Perform the BATTERY PACK CONTROL MODULE (BPCM) VERIFICATION TEST.

    No 

    • Test Complete.
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