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Test C: 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.
  1. If DTC 0003 is not retrieved for both circuit 914 (Tan/Orange wire) and circuit 915 (Pink/Light Blue wire), go to next step. If DTC 0003 is retrieved for both circuit 914 (Tan/Orange wire) and circuit 915 (Pink/Light Blue wire), go to step 3).
  2. If DTC 0003 is retrieved for circuit 914 (Tan/Orange wire), goto step 6). If DTC 0003 is not retrieved for circuit 914 (Tan/Orange wire), go to step 10).
  3. Inspect DLC terminals No. 2 and 10 for damage or bad wire connections. See Figure. If terminals and connections are okay, go to next step. If terminals and connections are damaged, repair as necessary. Repeat DATA LINK DIAGNOSTICS  under COMMUNICATION NETWORK DIAGNOSTICS.
  4. Turn ignition off. Measure resistance between DLC terminals No. 2 and 10. See Figure. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, go to step 14).
  5. Ensure ignition is off. Disconnect PCM 104-pin connector C185 (located on driver's side rear corner of engine compartment). Measure resistance between DLC terminal No. 2 and PCM connector C185 terminal No. 16. See Figure and Figure. Measure resistance between DLC terminal No. 10 and PCM connector C185 terminal No. 15. If resistances are less than 5 ohms, go to step 14). If resistances are 5 ohms or more, repair circuit 914 (Tan/Orange wire) and circuit 915 (Pink/Light Blue wire) between DLC and PCM connector C185. Reconnect connectors. Repeat DATA LINK DIAGNOSTICS  under COMMUNICATION NETWORK DIAGNOSTICS.
  6. Inspect DLC terminal No. 2 for damage or bad wire connection. If terminal and connection are okay, go to next step. If terminal and wire connection are damaged, repair as necessary. Reconnect connectors. Repeat DATA LINK DIAGNOSTICS  under COMMUNICATION NETWORK DIAGNOSTICS.
  7. Turn ignition off. Disconnect PCM 104-pin connector C185. Measure resistance between DLC terminal No. 2 and PCM connector C185 terminal No. 16. 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) between DLC and PCM connector C185. Reconnect connectors. Repeat DATA LINK DIAGNOSTICS  under COMMUNICATION NETWORK DIAGNOSTICS.
  8. Measure voltage between DLC terminals No. 2 and 5. See Figure. If voltage is present, go to next step. If no voltage is presen t (zero volts),go to step 14).
  9. Measure voltage between DLC terminals No. 2 and 16. If voltage is present, go to step 15). If no voltage is present (zero volts), go to step 14).
  10. Inspect DLC terminal No. 10 for damage or bad wire connection. If terminal and wire connection are okay, go to next step. If terminal and wire connection are damaged, repair as necessary. Reconnect connectors. Repeat DATA LINK DIAGNOSTICS  under COMMUNICATION NETWORK DIAGNOSTICS.
  11. Ensure ignition is off. Disconnect PCM 104-pin connector C185. Measure resistance between DLC terminal No. 10 and PCM connector C185 terminal No. 15. 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) between DLC and PCM connector C185. Reconnect connectors. Repeat DATA LINK DIAGNOSTICS  under COMMUNICATION NETWORK DIAGNOSTICS.
  12. Measure voltage between DLC terminals No. 5 and 10. If voltage is present, go to next step. If no voltage is present (zero volts),go to step 14).
  13. Measure voltage between DLC terminals No. 10 and 16. If no voltage is present (zero volts), go to next step. If voltage is present, verify NGS tester is functioning properly. Repeat DATA LINK DIAGNOSTICS under COMMUNICATION NETWORK DIAGNOSTICS .
  14. Disconnect 16-pin harness connector C102 (located on driver's side rear corner of engine compartment). Perform DATA LINK DIAGNOSTICS under COMMUNICATION NETWORK DIAGNOSTICS . If DTC 0001 is present, go to next step. If DTC 0001 is not present,go to step 16).
  15. Reconnect 16-pin harness connector C102. Disconnect PCM 104-pin connector C185. Perform DATA LINK DIAGNOSTICS  under COMMUNICATION NETWORK DIAGNOSTICS. If DTC 0001 is present, perform QUICK TEST in TESTS W/CODES article in ENGINE PERFORMANCE section. If DTC 0001 is not present, repair circuit 914 (Tan/Orange wire) and circuit 915 (Pink/Light Blue wire) between PCM and 16-pin harness connector C102. Reconnect connectors. Repeat DATA LINK DIAGNOSTICS  under COMMUNICATION NETWORK DIAGNOSTICS.
  16. Ensure all connectors are reconnected. Disconnect EATC 13-pin connector C281. Perform DATA LINK DIAGNOSTICS  under COMMUNICATION NETWORK DIAGNOSTICS. If DTC 0002 is present, replace EATC module. If DTC 0002 is not present, repair circuit 914 (Tan/Orange wire) and circuit 915 (Pink/Light Blue wire) between DLC and EATC module. Reconnect connectors. Repeat DATA LINK DIAGNOSTICS  under COMMUNICATION NETWORK DIAGNOSTICS.
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