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HOMESERVICE MANUALSCHRYSLER2004PT CRUISER TOURING, 2.4 B, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 23 (ENGINE SYSTEM TESTING & ENGINE COMPONENT TESTING)COMPUTERIZED ENGINE CONTROLSPOWERTRAIN CONTROL MODULECHECKING PCM POWER & GROUND CIRCUITS
2004 Chrysler PT Cruiser Touring, 2.4 B, Automatic

Checking PCM Power & Ground Circuits

2004 Chrysler PT Cruiser Touring, 2.4 B, AutomaticSECTION Checking PCM Power & Ground Circuits
WARNING: This page is about a different car, the 2003 Dodge Intrepid, 2003 Chrysler Intrepid, 2003 Chrysler Concorde, and 2003 Chrysler 300M. However, it is still accessible from the selected car via links, so may be relevant.

Possible Causes:

  1. PCM Fused B+ Circuit
  2. PCM Fused Ignition Switch Output Circuit
  3. PCM Ground Circuits

Testing

  1. Turn ignition off. Disconnect PCM harness connectors. PCM is located on left side of engine compartment. See Fig 1 . Connect a test light between ground and fused battery voltage circuit (Red wire) at PCM C1 harness connector terminal No. 29. See Fig 2 . If test light illuminates brightly, go to next step. If test light does not illuminate brightly, repair open in fused battery voltage circuit.
  2. Turn ignition on. Connect a test light between ground and fused ignition switch output circuit (Dark Blue/White wire) at PCM C1 harness connector terminal No. 11. If test light illuminates brightly, go to next step. If test light does not illuminate brightly, repair open in fused ignition switch output circuit.
  3. Turn ignition off. Using a test light connected to battery positive, individually probe the following ground circuits:
    • Black/Tan wire at PCM C1 harness connector terminal No. 9. See Fig 2 .
    • Black/Tan wire at PCM C1 harness connector terminal No. 18.
    • Black/Yellow wire at PCM C4 harness connector terminal No. 12. See Fig 3 .
    • Black/Red wire at PCM C4 harness connector terminal No. 13.
    • Black/Red wire at PCM C4 harness connector terminal No. 14.

    If test light illuminates at each ground circuit, ground circuits are okay. Test is complete. If test light does not illuminate at each ground circuit, repair open in appropriate ground circuit.

Fig 1: Locating Powertrain Control Module & Power Distribution Center
G00112688Courtesy of DAIMLERCHRYSLER CORPORATION
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.