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Power Circuit

  1. Turn ignition to OFF position. From harness side, there should be continuity between terminal No. 15 and ground. If continuity does not exist, inspect TCU harness circuit and repair or replace as needed.
  2. Measure from harness side of connector. Turn ignition to OFF position. Battery voltage should be present between time control unit connector terminals No. 9 and 15. There should be no battery voltage measured between terminals No. 5 and 15 or between terminals No. 2 and 15.
  3. Turn ignition switch to ACC position. Battery voltage should be present between time control unit connector terminals No. 9 and 15 and between terminals No. 2 and 15. There should be no battery voltage between terminals No. 5 and 15.
  4. Turn ignition switch to ON position. Battery voltage should be present between time control unit connector terminals No. 9 and 15, between terminals No. 5 and 15 and between terminals No. 2 and 15.
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