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Power Circuit Check

  1. Connect voltmeter between measuring unit terminals No. 20 and 43. Operate starter motor. Voltmeter should indicate .7-1.3 volts. If voltage is not as specified, repeat test using new ECU.
  2. To check distributor ignition signal to fuel injection ECU, connect voltmeter between measuring unit terminals No. 20 and 52. Operate starter motor. Voltmeter should indicate about 5-7 volts. If voltage is not as specified, repeat test using new distributor ignition ECU.
  3. Turn ignition off. To check voltage supply to ECU, connect voltmeter between measuring unit terminals No. 20 and 10. Battery voltage should be present. Turn ignition on. Connect voltmeter between measuring unit terminals No. 20 and 30. Battery voltage should be present. If battery voltage is not present, check wiring.
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