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)

Fig 1: ECM Terminal Identification

Courtesy of ISUZU MOTOR CO.