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Test D: Driver's Seat Module (DSM) Does Not Respond To NGS Tester

  1. Turn ignition off. Disconnect DSM 26-pin connector C313 located under driver's front seat. Inspect connector for loose, damaged or corroded terminals. Repair as necessary and retest system for normal operation. If connector is okay, reconnect connector. Turn ignition on. Perform data link diagnostic procedure. See DATA LINK DIAGNOSTIC TEST under COMMUNICATION NETWORK DIAGNOSTICS. If NGS tester indicates DSM: NO RESPONSE ON CKT 914 (BUS +), go to next step. If NGS tester does not indicate DSM: NO RESPONSE ON CKT 914 (BUS +), go to step 4).
  2. Turn ignition off. Disconnect NGS tester. Disconnect DSM connector C313. Using an ohmmeter, measure resistance of Tan/Orange wire between terminal No. 25 at DSM connector C313 and terminal No. 2 at Data Link Connector (DLC). See Figure and Fig 1. If resistance is less than 5 ohms, replace DSM and retest system for normal operation. If resistance is 5 ohms or more, go to next step.
  3. Disconnect 42-pin connector C202 located behind right side of instrument panel. See Figure. Inspect connector for loose, damaged or corroded terminals. Repair as necessary and retest system for normal operation. If connector is okay, measure resistance of Tan/Orange wire between terminal No. 6 at male half of connector C202 and terminal No. 2 at DLC. See Figure and Figure. If resistance is less than 5 ohms, repair open in Tan/Orange wire between DSM connector C313 and connector C202. Retest system for normal operation. If resistance is 5 ohms or more, repair open in Tan/Orange wire between connector C202 and DLC. Retest system for normal operation.
  4. Turn ignition off. Disconnect NGS tester. Using an ohmmeter, measure resistance of Pink/Light Blue wire between terminal No. 26 at DSM connector C313 and terminal No. 10 at DLC. See Figure and Fig 1. If resistance is less than 5 ohms, replace DSM and retest system for normal operation. If resistance is 5 ohms or more, go to next step.
  5. Disconnect 42-pin connector C202 located behind right side of instrument panel. See Figure. Inspect connector for loose, damaged or corroded terminals. Repair as necessary and retest system for normal operation. If connector is okay, measure resistance of Pink/Light Blue wire between terminal No. 7 at male half of connector C202 and terminal No. 10 at DLC. See Figure and Figure. If resistance is less than 5 ohms, repair open in Pink/Light Blue wire between DSM connector C313 and connector C202. Retest system for normal operation. If resistance is 5 ohms or more, repair open in Pink/Light Blue wire between connector C202 and DLC. Retest system for normal operation.
Fig 1: Identifying DSM Connector C313 Terminals
G97A28803Courtesy of FORD MOTOR CO.
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