LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Jeep >> 2016 >> Grand Cherokee Laredo, AWD >> Repair and Diagnosis >> Engine Performance >> System >> 3.6L - DTCS P0643 To P1718 >> DTC Troubleshooting >> P064A-Fuel Pump Control Module >> Diagnostic Test
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Test

  1. CHECK FOR AN ACTIVE DTC 
    1. Turn the ignition on, engine not running.
    2. With the scan tool, read DTCs and record on the repair order.

      Is the DTC active or pending?

      Yes 

      • Go To  2

      No 

  2. CHECK THE (N13) FPCM PUMP CONTROL CIRCUIT FOR A SHORT TO GROUND 
    1. Turn the ignition off.
    2. Disconnect the FPCM harness connector.
    3. Check for continuity between ground and the (N13) FPCM Pump Control circuit at the FPCM harness connector.

      Is there continuity between ground and the (N13) FPCM Pump Control circuit?

      Yes 

      • Repair the (N13) FPCM Pump Control circuit for a short to ground.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No