ECM Terminal Identification
See Fig 1 for ECM terminal identification. The following conditions must be present before testing pin voltages:
- Engine At Normal Operating Temperature
- Engine Idling In Closed Loop (ENGINE RUN Column)
- ALDL Test Terminal Not Grounded
- Transaxle In Park Or Neutral
- All B+ Voltages Indicate Charging Or Battery Voltage
- All "0" Voltages Are Ground Circuits (Should Read Less Than 0.10 Volt)