2002 Chrysler Voyager ECFACTORY OEM SERVICE PROCEDURE

Electrical Inputs

  • Headlamp Battery Supplies 1 & 2

    12 volt input on pins No. 1 and No. 2. Battery supply voltage for switching headlamp circuits only.

  • Module Battery Supply

    12-volt input on pin No. 9. Battery supply voltage for all other FCM operations.

  • Power Ground

    Ground source on pin No. 8 for all FCM operations.

  • Ignition Switch RUN Or START Position Status

    12-volt input on pin No. 37. Allows the FCM to determine the ignition switch status for related FCM operations.

  • Ignition Switch START Only Status

    12-volt input on pin No. 19. Allows the FCM to discriminate between RUN/START input and START for related FCM operations.

  • PCI Bus

    Approximately 7.5-volt input on pin No. 22. Allows the FCM to communicate with other modules on the vehicle bus.

  • Stop Lamp Switch Status

    12-volt input on pin No. 44. Provides for brake shift interlock function.

  • Horn Switch

    Ground input on pin No. 17. Primary means for engaging the horn.

  • Back-Up Switch

    Ground input on pin No. 39. Input is converted to a PCI Bus status message for use by other modules.

  • Wiper Park Switch

    Ground input on pin No. 16. Used to determine park placement of wipers. Also used as feedback to FCM to determine correct operating mode of wipers.

  • Washer Fluid Level Switch

    Ground input to pull-up on pin No. 18. Ground is switched into the circuit when washer bottle fluid level is low.

  • Brake Fluid Level Switch

    Ground input to pull-up on pin No. 36. Ground is switched into the circuit when brake fluid level is low.

  • Ambient Temperature Sensor

    Resistive input to pull-up on pin No. 25. Corresponding voltage level is converted to a PCI Bus message for use by other modules on the bus.

  • Right Park Lamp Outage

    12-volt input on pin No. 21. Used to determine if right park lamp circuit is operating properly.

  • Left Park Lamp Outage

    12-volt input on pin No. 41. Used to determine if left park lamp circuit is operating properly.

  • Battery IOD

    12-volt input on pin No. 20. The FCM enters a low power consumption mode when the ignition is turned OFF. This low current draw battery supply keeps the microprocessor functioning in the low power mode.

  • Battery (+) Connection Detection

    12-volt input on pin No. 38. The battery connection on the PDC incorporates the use of an internal switch to determine if the connector is properly mated and the Connector Positive Assurance (CPA) is engaged. If the CPA is not properly engaged, a voltage on pin No. 38 will be interpreted as an unseated connector and a fault will set.

  • Flash Programming Voltage

    20-volt input on pin No. 42. When a DRBIII® is connected and the proper flash reprogramming sequence is selected, the 20-volt signal will be applied through pin No. 42.
Factory Service Tools

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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.

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