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Diagnosis And Testing - Overhead Console: Notes

WARNING: This page is about a different car, the 2004 Dodge Grand Caravan, 2004 Dodge Caravan, and 2004 Chrysler Town & Country. However, it is still accessible from the selected car via links, so may be relevant.

If the problem with the overhead console is an inaccurate or scrambled display, refer to Self-Diagnostic Test  below. If the problem with the overhead console is incorrect Vacuum Fluorescent Display (VFD) dimming levels, use a DRBIII(R) scan tool and the proper Diagnostic Procedures to test for the correct dimming message inputs being received from the Body Control Module (BCM) or Front Control Module (FCM) over the J1850 Programmable Communications Interface (PCI) data bus circuit. If the problem is a no-display condition, use the following procedures. For complete circuit diagrams, refer to Overhead Console  Wiring Diagram.

  1. Check the fused B(+) fuse in the integrated power module. If OK, go to Step 2. If not OK, repair the shorted circuit or component as required and replace the faulty fuse.
  2. Check for battery voltage at the fused B(+) fuse in the integrated power module. If OK, go to Step 3. If not OK, repair the open fused B(+) circuit to the fused B(+) fuse in the integrated power module as required.
  3. Check the fused ignition switch output (run/ start) fuse in the integrated power module. If OK, go to Step 4. If not OK, repair the shorted circuit or component as required and replace the faulty fuse.
  4. Turn the ignition switch to the On position. Check for battery voltage at the fused ignition switch output (run/start) fuse in the integrated power module. If OK, go to Step 5. If not OK, repair the open fused ignition switch output (run/start) circuit to the ignition switch as required.
  5. Turn the ignition switch to the Off position. Disconnect and isolate the battery negative cable. Remove the overhead console. Check for continuity between the ground circuit cavity of the roof wire harness connector for the electronics module and a good ground. There should be continuity. If OK, go to Step 6. If not OK, repair the open ground circuit to ground as required.
  6. Connect the battery negative cable. Check for battery voltage at the fused B(+) circuit cavity of the roof wire harness connector for the electronics module. If OK, go to Step 7. If not OK, repair the open fused B(+) circuit to the fused B(+) fuse in the integrated power module as required.
  7. Turn the ignition switch to the On position. Check for battery voltage at the fused ignition switch output (run/start) circuit cavity of the roof wire harness connector for the electronics module. If OK, refer to SELF-DIAGNOSTIC TEST  for further diagnosis of the electronics module and the J1850 PCI data bus circuit. If not OK, repair the open fused ignition switch output (run/start) circuit to the fuse in the integrated power module as required.
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