1997 Ford Probe Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Test N: Front Control Unit (FCU) Does Not Respond To Scan Tester

WARNING: This page is about a different car, the 1997 Lincoln Continental. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ensure ignition switch is in OFF position. Disconnect 84-pin harness connector C217. Harness connector C217 is located behind driver's side of instrument panel. See Figure .
  2. Using ohmmeter, check resistance between terminal No. 76 (Tan/Orange wire) on male side of harness connector C217 and terminal No. 2 (Tan/Orange wire) on Data Link Connector (DLC). See Figure and Figure .
  3. If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, repair open circuit on Tan/Orange wire between DLC and harness connector C217. Repeat TEST A  .
  4. Using ohmmeter, check resistance between terminal No. 77 (Pink/Light Blue wire) on male side of harness connector C217 and terminal No. 10 (Pink/Light Blue wire) on DLC. See Figure and Figure .
  5. If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, repair open circuit on Pink/Light Blue wire between DLC and harness connector C217. Repeat TEST A  .
  6. Disconnect Black 16-pin connector C224 from Front Control Unit (FCU). The FCU is located behind center of instrument panel on the radio. See Figure .
  7. Using ohmmeter, check resistance between terminal No. 8 (Tan/Orange wire) on connector C224 and terminal No. 76 (Tan/Orange wire) on male side of harness connector C217. See Figure and Fig 1 .
  8. If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, repair open circuit on Tan/Orange wire between harness connector C217 and connector C224. Repeat TEST A  .
  9. Using ohmmeter, check resistance between terminal No. 16 (Pink/Light Blue wire) on connector C224 and terminal No. 77 (Pink/Light Blue wire) on male side of harness connector C217. See Figure and Fig 1 .
  10. If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, repair open circuit on Pink/Light Blue wire between harness connector C217 and connector C224. Repeat TEST A  .
  11. Inspect pins and wire connections on harness connector C217 and connector C224. If pins and wire connections are okay, replace FCU. Repeat TEST A  . If pins or wire connections are defective or damaged, repair pins or wire connections as necessary. Repeat TEST A  .
Fig 1: Identifying Connector C224 Terminals
G96I29478Courtesy of FORD MOTOR CO.
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