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Home >> Mercury >> 2000 >> Villager Base >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission Diagnosis >> Symptom Tests >> Test C: Transmission Control Switch Inoperative

Test C: Transmission Control Switch Inoperative

  1. Check TCS Ground

    Turn ignition switch to OFF position. Disconnect Transmission Control Switch (TCS) harness connector C222. Measure resistance between ground and terminal No. 2 (Black wire) at TCS harness connector C222. If resistance is 5 ohms or less, go to next step. If resistance is not 5 ohms or less, repair open in Black wire.

  2. Check TCS Input

    Turn ignition switch to RUN position. Measure voltage between ground and terminal No. 1 (Green/Orange wire) at TCS harness connector C222. If voltage is greater than 10 volts, replace TCS. If voltage is not greater than 10 volts, go to next step.

  3. Check Circuit For Open

    Turn ignition switch to OFF position. Disconnect TCM harness connector C277A. Measure resistance of Green/Orange wire between terminal No. 22 at TCM harness connector C277A and terminal No. 1 at TCS harness connector C222. If resistance is 5 ohms or less, go to next step. If resistance is not 5 ohms or less, repair open in Green/Orange wire.

  4. Check TCM

    Turn ignition switch to ON position. Connect a fused (10-amp) jumper wire between ground and terminal No. 13 (Blue/Orange wire) at TCM harness connector C277A. If transmission control indicator (OD OFF) light illuminates, replace TCM. If OD OFF light does not illuminate, repair indicator light as necessary. See ANALOG INSTRUMENT PANELS - VILLAGER article in ACCESSORIES & EQUIPMENT.
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