Test A: Powertrain Control Module (Pcm) Fault On Circuit 914/915
WARNING: This page is about a different car, the 1997 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
- If DTC 0001 is retrieved for circuit 914 (Tan/Orange wire), go to next step. If DTC 0001 is not retrieved for circuit 914 (Tan/Orange wire),go to step 6).
- Disconnect 16-pin harness connector C102 (located on driver's side rear corner of engine compartment). Inspect connector and terminal No. 3 (Tan/Orange wire) for damage or corrosion. If connector and terminal No. 3 is okay, go to next step. If connector or terminal No. 3 is damaged, repair as necessary. Reconnect connectors. Repeat DATA LINK DIAGNOSTICS under COMMUNICATION NETWORK DIAGNOSTICS.
- Measure resistance between Data Link Connector (DLC) terminal No. 2 and female side of harness connector C102 terminal No. 3 (Tan/Orange wire). See Figure and Fig 1. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair circuit 914 (Tan/Orange wire) and circuit 915 (Pink/Light Blue wire). Reconnect connectors. Repeat DATA LINK DIAGNOSTICS under COMMUNICATION NETWORK DIAGNOSTICS.
- Disconnect PCM 104-pin connector C185 (located on driver's side rear corner of engine compartment). Inspect terminal No. 16 and circuit 914 (Tan/Orange wire) for damage or corrosion. See Fig 2. If terminal No. 16 and circuit are okay, go to next step. If te rminal No. 16 and circuit are damaged, repair as necessary. Reconnect connectors. Repeat DATA LINK DIAGNOSTICS under COMMUNICATION NETWORK DIAGNOSTICS.
- Measure resistance between PCM connector terminal No. 16 and male side of harness connector C102 terminal No. 3 (Tan/Orange wire). If resistance is less than 5 ohms, perform QUICK TEST in TESTS W/CODES article in ENGINE PERFORMANCE section. If resistance is 5 ohms or more, repair circuit 914 (Tan/Orange wire) and circuit 915 (Pink/Light Blue wire) between PCM connector terminal No. 16 and connector C102. Reconnect connectors. Repeat DATA LINK DIAGNOSTICS under COMMUNICATION NETWORK DIAGNOSTICS.
- Disconnect harness connector C102. Inspect connector and terminal No. 7 (Pink/Light Blue wire) for damage or corrosion. If connector and terminal No. 7 are okay, go to next step. If connector and terminal No. 7 are damaged, repair as necessary. Reconnect connectors. Repeat DATA LINK DIAGNOSTICS under COMMUNICATION NETWORK DIAGNOSTICS.
- Measure resistance between Data Link Connector (DLC) terminal No. 10 and female side of harness connector C102 terminal No. 7 (Pink/Light Blue wire). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair circuit 914 (Tan/Orange wire) and circuit 915 (Pink/Light Blue wire). Reconnect connectors. Repeat DATA LINK DIAGNOSTICS under COMMUNICATION NETWORK DIAGNOSTICS.
- Disconnect PCM 104-pin connector C185. Inspect terminal No. 15 and circuit (Pink/Light Blue wire) for damage or corrosion. If terminal No. 15 and circuit are okay, go to next step. If terminal No. 15 and circuit are damaged, repair as necessary. Reconnect connectors. Repeat DATA LINK DIAGNOSTICS under COMMUNICATION NETWORK DIAGNOSTICS.
- Measure resistance between PCM connector terminal No. 15 and male side of harness connector C102 terminal No. 7 (Pink/Light Blue wire). If resistance is less than 5 ohms, perform QUICK TEST in TESTS W/CODES article in ENGINE PERFORMANCE section. If resistance is 5 ohms or more, repair circuit 914 (Tan/Orange wire) and circuit 915 (Pink/Light Blue wire) between PCM connector and harness connector C102. Reconnect connectors. Repeat DATA LINK DIAGNOSTICS under COMMUNICATION NETWORK DIAGNOSTICS.