LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chrysler >> 2002 >> PT Cruiser Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P1653: PCI Bus Shorted To Ground >> Testing
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC P1653: PCI Bus Shorted To Ground: Testing

  1. Turn the ignition off. Measure the resistance between ground and the PCI Bus circuit at the Data Link Connector. Is the resistance below 100 ohms? If yes, go to next step. If no, go to step  3.
  2. Monitor the resistance between ground and the PCI Bus circuit at the Data Link Connector. Disconnect the Air Bag Control Module, Instrument Cluster, Remote Keyless Entry Module, Sentry Key Immobilizer Module, Radio, Left Side Air Bag Module, Right Side Air Bag Module and the PCM, one at a time, disconnecting the PCM last. If the resistance never changes to an open circuit with all of the modules disconnected, a short to ground exists in the wiring harness. Does the resistance value change to open, or out of limits when disconnecting a specific module? If yes, replace and reprogram the specific Control Module that is causing the short to ground. If the PCM is replaced, see PROGRAMMING . If any other module is replaced, see REMOVAL & INSTALLATION in appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT. If no, repair the short to ground in the PCI Bus circuit.
    3. WARNING: When the engine is operating, do not stand in a direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing.
  3. The conditions that set the DTC are not present at this time. The following may help in identifying the intermittent condition. With the engine running at normal operating temperature, monitor the DRBIII® parameters related to the DTC while wiggling the wiring harness. Look for parameter values to change and/or a DTC to set. Review the DRBIII® Freeze Frame information. If possible try to duplicate the conditions under which the DTC was set. Refer to any Technical Service Bulletins (TSB) that may apply. Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals. Were any of the above conditions present? If yes, repair as necessary. If no, test is complete.
scientia non olet · About LEMON Manuals