ECM Terminal Arrangement

Instrument panel junction block assembly, main body ECM (Network gateway computer)

Fig 1: Identifying Instrument Panel Junction Block Assembly And Main Body ECM (Network Gateway Computer) Connector Terminals

Courtesy of SUBARU OF AMERICA, INC.

Inspection of the instrument panel junction block assembly and the main body ECM (network gateway computer)

STANDARD VALUE

Terminal No. (Terminal symbol)

Inspection conditions

Standard value

A73-24 ↔chassis ground

IG ON

11 to 14 V

D5-22 (ACC) ↔chassis ground⁽¹⁾

ACC ON

11 to 14 V

⁽¹⁾	When there is a smart entry & start system

NOTE: If it is outside the standard values, the vehicle is defective.

Heater control SUB-assembly (Rear window defogger switch) (except for automatic air conditioning system)

Disconnect the connector D22 of the heater control SUB-assembly (Rear window defogger switch).

Measure the voltage and resistance between terminals.

Fig 2: Identifying Heater Control Sub-Assembly Connector Terminals (Rear Window Defogger Switch)

Courtesy of SUBARU OF AMERICA, INC.

STANDARD VALUE

Terminal No. (Terminal symbol)	Inspection conditions	Standard value
D22-2 (IND+) ↔D22-4 (RDEF-)	Always	11 to 14 V
D22-4 (RDEF-) ↔chassis ground	Always	Less than 1 Ω

Connect the connector D22 of the heater control SUB-assembly (Rear window defogger switch).

Measure the voltage between the terminals.

STANDARD VALUE

Terminal No. (Terminal symbol)	Inspection conditions	Standard value
D22-6 (IND+) ↔D22-4 (RDEF-)	IG ON Defogger switch OFF →ON	11 to 14 V →1 V or less