Power Supply to ECU Check

1. With ignition Off, disconnect multiple pin plug from ECU.
2. Turn ignition On. Using suitable voltmeter, measure voltage between terminals 12 and 25. Battery voltage should exist.
3. If battery voltage does not exist, measure voltage on plug connected between terminal 3 and ground at the central electric board. Battery voltage should exist.
4. If battery voltage does not exist, pull out relay VIII and bridge terminals 30 and 87. Recheck voltage as outlined in step 2. If voltage exists, replace electronic relay VIII.