2002 Chrysler Voyager ECFACTORY OEM SERVICE PROCEDURE

Front Blower Motor Inoperative

NOTE: After making any repairs, perform BODY VERIFICATION TEST  under VERIFICATION TESTS.
  1. With the DRBIII® in FCM, read the active DTCs. If there are any active FCM DTCs present that are related to the blower relay circuits, refer to the manual temperature control section of the DIAGNOSTIC TROUBLE CODE IDENTIFICATION  table. For all other FCM DTCs, refer to the DIAGNOSTIC TROUBLE CODE IDENTIFICATION table. See DIAGNOSTIC TROUBLE CODE IDENTIFICATION  table. With the DRBIII®, reset the ATC after repair/replacement is complete. If there are no active FCM DTCs present, go to the next step.
  2. Turn the ignition off. Remove and inspect Intelligent Power Module (IPM) Fuse No. 10. If the fuse is open, go to the next step. If the fuse is not open, go to step  6.
  3. Replace IPM Fuse No. 10. Turn the ignition on. Operate the blower motor in all speeds. Start the engine and operate the ATC system in all modes and speeds. If the blower motor operates properly without blowing the fuse, refer to the wiring diagrams to help isolate a possible intermittent short to ground condition. See WIRING DIAGRAMS . With the DRBIII®, reset the ATC after repair/replacement is complete. If the blower motor does not operate properly without blowing the fuse, go to the next step.
  4. Turn the ignition off. Disconnect the Front Blower Power Module C1 harness connector. See Fig 1. Measure the resistance between ground and the Fused Front Blower Motor Relay Output circuit. If the resistance is below 10K ohms, repair the Fused Front Blower Motor Relay Output circuit for a short to ground. Replace IPM Fuse No. 10. With the DRBIII®, reset the ATC after repair/replacement is complete. If the resistance is above 10K ohms, go to the next step.
  5. Turn the ignition off. Replace IPM Fuse No. 10. Disconnect the Front Blower Power Module C1 harness connector. Disconnect the Front Blower Power Module C2 harness connector. See Fig 1. Connect a jumper wire between the Fused Front Blower Motor Relay Output circuit in the Front Blower Power Module C1 harness connector and the Dark Blue wire in the Front Blower Power Module C2 harness connector. Connect a jumper wire between the Ground circuit in the Front Blower Power Module C1 harness connector and the Dark Blue/Yellow wire in the Front Blower Power Module C2 harness connector. Turn the ignition on. If the Blower Motor operates at full speed without blowing the fuse, replace the Front Blower Power Module. See appropriate AUTOMATIC A/C-HEATER SYSTEMS article in HVAC. Replace IPM Fuse No. 10. With the DRBIII®, reset the ATC after repair/replacement is complete. If the Blower Motor does not operate at full speed without blowing the fuse, replace the Blower Motor. See appropriate AUTOMATIC A/C-HEATER SYSTEMS article in HVAC. Replace IPM Fuse No. 10. With the DRBIII®, reset the ATC after repair/replacement is complete.
    6. NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
  6. Ensure IPM Fuse No. 10 is installed. Disconnect the Front Blower Power Module C1 harness connector. See Fig 1. Turn the ignition on. Using a 12-volt test light connected to ground, back probe the Fused Front Blower Motor Relay Output circuit in the Front Blower Power Module C1 harness connector. If the test light illuminates brightly, go to the next step. If the test light does not illuminate brightly, go to step  13.
  7. Turn the ignition off. Disconnect the Front Blower Power Module C1 harness connector. See Fig 1. Measure the resistance between ground and the Ground circuit. If the resistance is below 5 ohms, go to the next step. If the resistance is above 5 ohms, repair the Ground circuit for an open. With the DRBIII®, reset the ATC after repair/replacement is complete.
  8. Turn the ignition off. Disconnect the Front Blower Power Module C1 harness connector. See Fig 1. Disconnect the Automatic Temperature Control Module C2 harness connector. See Figure. Turn the ignition on. Measure the voltage of the Blower Motor Control circuit. Is there any voltage present? If any voltage is present, repair the Blower Motor Control circuit for a short to voltage. With the DRBIII®, reset the ATC after repair/replacement is complete. Perform BODY VERIFICATION TEST . If No voltage is present, go to next step.
  9. Turn the ignition off. Disconnect the Front Blower Power Module C1 harness connector. See Fig 1. Disconnect the Automatic Temperature Control Module C2 harness connector. See Figure. Measure the resistance of the Blower Motor Control circuit between the Front Blower Power Module C1 harness connector and the Automatic Temperature Control Module C2 harness connector. If the resistance is below 5 ohms, go to the next step. If the resistance is above 5 ohms, repair the Blower Motor Control circuit for an open. With the DRBIII®, reset the ATC after repair/replacement is complete.
  10. Turn the ignition off. Make sure that the Front Blower Power Module C1 harness connector is connected to the Front Blower Power Module. Make sure that the Automatic Temperature Control Module C2 harness connector is connected to the Automatic Temperature Control Module. Start the engine. Press the ATC Power Switch on. Set the blower switch to the LO speed position. While back probing, measure the voltage of the Blower Motor Control circuit in the Automatic Temperature Control Module C2 harness connector. If the voltage is above 10 volts, go to the next step. If the voltage is below 10 volts, replace the Front Blower Power Module. See appropriate AUTOMATIC A/C-HEATER SYSTEMS article in HVAC. With the DRBIII®, reset the ATC after repair/replacement is complete.
    11. NOTE: The Blower Power Module provides a 10 volt signal to the ATC Module over the Blower Motor Control circuit. The ATC Module provides a variable duty cycle ground to the 10 volt signal based on input from the blower control switch.
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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.