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Trip Computer: Supra

  1. Check ground circuit between "GND" terminal and ground wire in connector. See Figure. If there is no voltage, repair or replace Electronically Controlled Transmission (ECT) fuse, connector or wiring harness.
  2. Check battery voltage between terminals "+B" and ground of connector. If there is no voltage, replace ECT fuse, connector or wiring harness.
  3. Check voltage between terminals "DIM" and "GND" of wiring connector with light switch in "ON" position. Voltage should be nearly battery voltage.
  4. Check voltage between terminals "ACC" and "GND" of wiring connector with ignition switch at "ACC" or "ON" position. Voltage should be nearly battery voltage.
  5. Check voltage between terminals "VEFI" and "GND" of wiring connector with ignition switch in "ON" position. Voltage should be nearly battery voltage.
  6. Check voltage between terminal "X" and body ground of wiring connector with ignition switch in "ON" position. Voltage should be nearly battery voltage.
  7. Check that there is continuity between terminals "F" and "GND" of wiring connector 4 times per revolution of magnet shaft.
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