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Test D: Natural Gas Vehicle (NGV) Module Open In Circuits No. 914 & 915

WARNING: This page is about a different car, the 1997 Mercury Grand Marquis and 1997 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
  1. If DTC 0004 is retrieved for circuit No. 914 (Tan/Orange wire), go to next step. If DTC 0004 is not retrieved for circuit No. 914 (Tan/Orange wire), go to step 6).
  2. Disconnect 16-pin harness connector C107 (located on passenger's side rear corner of engine compartment). Inspect connector and pin No. 4 (Tan/Orange wire) for damage or corrosion. If connector and pin No. 4 is okay, go to next step. If connector or pin No. 4 is damaged, repair as necessary. Reconnect connectors. Repeat DATA LINK DIAGNOSTICS under COMMUNICATION NETWORK DIAGNOSTICS .
  3. Measure resistance between Data Link Connector (DLC) pin No. 2 and female side of harness connector C107 terminal No. 4 (Tan/Orange wire). See Figure and Figure. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair circuit No. 914 (Tan/Orange wire). Reconnect connectors. Repeat DATA LINK DIAGNOSTICS under COMMUNICATION NETWORK DIAGNOSTICS .
  4. Disconnect Natural Gas Vehicle (NGV) module 60-pin connector C124 (located in front of A/C condenser behind radiator grille). Inspect pin No. 18 and circuit No. 915 (Pink/Light Blue wire) for damage or corrosion. See Fig 1. If pin No. 18 and circuit are okay, go to next step. If pin No. 18 or circuit is damaged, repair as necessary. Reconnect connectors. Repeat DATA LINK DIAGNOSTICS  under COMMUNICATION NETWORK DIAGNOSTICS.
  5. Measure resistance between NGV connector pin No. 18 and male side of harness connector C107 terminal No. 4 (Tan/Orange wire). If resistance is less than 5 ohms, replace NGV module. If resistance is 5 ohms or more, repair circuit No. 914 (Tan/Orange wire) and circuit No. 915 (Pink/Light Blue wire) between NGV connector pin No. 18 and connector C107. Reconnect connectors. Repeat DATA LINK DIAGNOSTICS under COMMUNICATION NETWORK DIAGNOSTICS .
  6. Disconnect harness connector C107. Inspect connector and pin No. 8 (Pink/Light Blue wire) for damage or corrosion. If connector and pin No. 8 is okay, go to next step. If connector or pin No. 8 is damaged, repair as necessary. Reconnect connectors. Repeat DATA LINK DIAGNOSTICS under COMMUNICATION NETWORK DIAGNOSTICS .
  7. Measure resistance between Data Link Connector (DLC) pin No. 10 and female side of harness connector C107 terminal No. 8 (Pink/Light Blue wire). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair circuit No. 915 (Pink/Light Blue wire). Reconnect connectors. Repeat DATA LINK DIAGNOSTICS under COMMUNICATION NETWORK DIAGNOSTICS .
  8. Disconnect NGV module 60-pin connector C124. Inspect pin No. 19 and circuit (Tan/Orange wire) for damage or corrosion. If pin No. 19 and circuit are okay, go to next step. If pin No. 19 or circuit is damaged, repair as necessary. Reconnect connectors. Repeat DATA LINK DIAGNOSTICS under COMMUNICATION NETWORK DIAGNOSTICS .
  9. Measure resistance between NGV module connector pin No. 19 and male side of harness connector C107 terminal No. 8 (Pink/Light Blue wire). If resistance is less than 5 ohms, replace NGV module. If resistance is 5 ohms or more, repair circuit No. 914 (Tan/Orange wire) and circuit No. 915 (Pink/Light Blue wire) between NGV module connector and harness connector C107. Reconnect connectors. Repeat DATA LINK DIAGNOSTICS  under COMMUNICATION NETWORK DIAGNOSTICS.
Fig 1: Identifying Natural Gas Vehicle (NGV) Module Connector C124 Terminals
G97I28652Courtesy of FORD MOTOR CO.
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