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Test A: Shift Solenoids

WARNING: This page is about a different car, the 2001 Mercury Villager. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition off. Disconnect transaxle solenoid harness connector. Measure resistance between ground and terminal No. 3 (component side) at transaxle solenoid harness connector. Measure resistance between ground and terminal No. 4 (component side) at transaxle solenoid harness connector. If both resistance measurements are 20-40 ohms, go to next step. If either resistance measurement is not 20-40 ohms, replace appropriate shift solenoid. See appropriate AUTOMATIC article in TRANSMISSION SERVICING.
  2. Disconnect TCM harness connector C277A. Measure resistance of Yellow/Violet wire between terminal No. 11 at TCM harness connector C277A and terminal No. 3 at transaxle solenoid harness connector. Measure resistance of Yellow/Green wire between terminal No. 12 at TCM harness connector C277A and terminal No. 4 at transaxle solenoid harness connector. See Figure and Figure . If both resistance measurements are less than 5 ohms, go to next step. If either resistance measurement is not less than 5 ohms, repair open circuit. See WIRING DIAGRAMS  .
  3. Measure resistance between ground and terminal No. 11 (Yellow/Violet wire) at TCM harness connector C277A. Measure resistance between ground and terminal No. 12 (Yellow/Green wire) at TCM harness connector C277A. If both resistance measurements are greater than 10 k/ohms, replace TCM. If either resistance measurement is less than 10 k/ohms, repair short to ground in appropriate circuit.
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