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Self-Diagnostic System Check

NOTE: Use this check when IPC self-diagnostics cannot be entered, or IPC display stays blank.
  1. Remove instrument panel top cover to access cluster connectors. See INSTRUMENT PANEL TOP COVER  under REMOVAL & INSTALLATION. Using DVOM with negative probe connected to ground, backprobe IPC connector terminals No. A1, A2, C12, and C14 for 10 volts or more. See Figure .
  2. If all voltage readings are below specification, check/repair battery and charging system for fault, and retest IPC. If all voltage readings are within specification, go to step 4). If one or more voltage readings are not within specification, go to next step.
  3. Trace particular wiring circuit to repair open or short. See WIRING DIAGRAMS  . After repairs, retest IPC. If still unable to enter self-diagnostics mode, replace IPC. See INSTRUMENT PANEL CLUSTER  under REMOVAL & INSTALLATION.
  4. Turn ignition off. Disconnect IPC connectors. Measure resistance to ground at terminals A5 and C16. See Figure . If resistance reading for either terminal is greater than 2 ohms, repair open in that circuit. If resistance reading for both is less than 2 ohms, go to next step.
  5. Reconnect IPC connectors. Turn ignition on. With voltmeter connected to ground, backprobe IPC connector terminal B2 (Yellow wire). If voltage reading is less than 14 volts, go to step 7). If voltage reading is 14 volts or greater, go to next step.
  6. Inspect connectors and terminals for damage or bad terminal contacts of IPC. Repair as required. Reconnect connectors to IPC and retry to enter self-diagnostics mode. If still unable to enter self-diagnostics mode, replace IPC. See INSTRUMENT PANEL CLUSTER  under REMOVAL & INSTALLATION.
  7. Disconnect radio control head connector. Measure voltage at IPC connector terminal B2. If voltage reading is less than 14 volts, go to next step. If voltage is at least 14 volts, replace radio control head.
  8. Disconnect Black IPC connector. Check for continuity to ground at IPC connector terminal B2 (Yellow wire). If continuity is present, repair short to ground in Yellow wire. If continuity is not present, replace IPC. See INSTRUMENT PANEL CLUSTER  under REMOVAL & INSTALLATION.
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