ECM Terminal Arrangement
- Instrument panel junction block assembly, main body ECM (Network gateway computer).Fig 1: Instrument Panel Junction Block Assembly, Main Body ECM (Network Gateway Computer) Connector Terminal Identification
Courtesy of SUBARU OF AMERICA, INC.
- Measure the voltage and resistance between terminals.NOTE: This inspection is performed from the back side of the connector with the connector in a connected state.
Terminal No. (Terminal code) Input/Output Item Measuring condition Criteria 3A-15↔ Chassis ground Input Voltage IG ON 11 to 14V 3A-20↔ Chassis ground Input Voltage IG ON 11 to 14V 3A-27↔ Chassis ground Input Voltage Always 11 to 14V 3C-19↔ Chassis ground Input Voltage Always 11 to 14V 3E-1↔ Chassis ground Input Voltage Always 11 to 14V 3A-12↔ Chassis ground - Resistance Always Less than 1 Ω 3A-13↔ Chassis ground - Resistance Always Less than 1 Ω 3B-18↔ Chassis ground - Resistance Always Less than 1 Ω D6-1 (GND) ↔ Chassis ground - Resistance Always Less than 1 Ω A73-4 (GND) ↔ Chassis ground - Resistance Always Less than 1 Ω - Remove the instrument panel junction block assembly from the main body ECM (Network gateway computer).
- Measure the voltage and resistance between terminals.
Terminal No. (Terminal code) Input/Output Item Measuring condition Criteria MB-1 (BECU) ↔ Chassis ground Input Voltage Always 11 to 14V MB-8 (IG) ↔ Chassis ground Input Voltage IG ON 11 to 14V MB-9 (ACC) ↔ Chassis ground Input Voltage ACC ON 11 to 14V MB-32 (BMPX) ↔ Chassis ground Input Voltage Always 11 to 14V MB-11 (GND) ↔ Chassis ground - Resistance Always Less than 1 Ω
- Measure the voltage and resistance between terminals.