ECM Terminal Arrangement

Main body ECM (multiplex network body computer)

Courtesy of SUBARU OF AMERICA, INC.

Inspection of the main body ECM (multiplex network body computer) and the instrument panel junction block ASSY

Disconnect the connector of the main body ECM (multiplex network body computer).

Measure the voltage between the connector terminals on the vehicle wiring harness side.

Standard value

Terminal No. (Terminal symbol)

Inspection conditions

Standard value

D5-22 (ACC) ←→chassis ground⁽¹⁾

ACC ON

11 to 14V

⁽¹⁾	With smart entry & start system

NOTE: If it is out of the standard value, it can be judged as malfunction of the vehicle.

Disconnect the connector of the instrument panel junction block ASSY.

Measure the voltage and resistance between the connector terminals on the vehicle wiring harness side.

Standard value

Terminal No. (Terminal symbol)	Inspection conditions	Standard value
3A-12 ←→chassis ground	Always	Less than 1 Ω
3A-13 ←→chassis ground	Always	Less than 1 Ω
3A-15 ←→chassis ground	IG ON	11 to 14V
3A-20 ←→chassis ground	ACC ON	11 to 14V
3A-27 ←→chassis ground	Always	11 to 14V
3C-19 ←→chassis ground	Always	11 to 14V
3E-1 ←→chassis ground	Always	11 to 14V
A73-4 (GND) ←→chassis ground	Always	Less than 1 Ω
D6-1 (GND) ←→chassis ground	Always	Less than 1 Ω

NOTE: If it is out of the standard value, it can be judged as malfunction of the vehicle.

Connect the connectors of the main body ECM (multiplex network body computer) and the instrument panel junction block ASSY.

Measure the voltage or waveform between the connector terminals.

Standard value

Terminal No. (Terminal symbol)

Inspection conditions

Standard value

3B-13 ←→chassis ground

With driver's door closed →opened

11 to 14V →Less than 1V

3A-28 ←→chassis ground

With passenger's door closed →opened

11 to 14V →Less than 1V

3D-26 ←→chassis ground

With trunk closed →opened

11 to 14V →Less than 1V

D5-5 (FLCL) ←→chassis ground

Driver's side courtesy light ON →OFF

11 to 14V →Less than 1V

D5-6 (FRCL) ←→chassis ground

Passenger's side courtesy light ON →OFF

11 to 14V →Less than 1V

D5-7 (DOMR) ←→chassis ground

Map light ASSY OFF →ON

Less than 1 V →11 to 14 V

D5-28 (ILL) ←→chassis ground ⁽²⁾

Transponder key amplifier (key cylinder light) ON →OFF

Less than 1 V →11 to 14 V

D6-11 (LSFD) ←→chassis ground ⁽¹⁾

Driver's side door locked →unlocked

Pulse generation →less than 1 V

D6-12 (LSFP) ←→chassis ground ⁽¹⁾

Passenger's side door locked →unlocked

Pulse generation →less than 1 V

⁽¹⁾	With smart entry & start system

⁽²⁾	Without smart entry & start system

NOTE: If the measured value is not within the range of the standard value, it can be determined that the main body ECM (multiplex network body computer) has a fault.

Smart key computer ASSY (collation ECM)

Courtesy of SUBARU OF AMERICA, INC.

Inspection of the smart key computer ASSY (collation ECM)

Disconnect the connector D48 of the smart key computer ASSY (collation ECM).

Measure the voltage and resistance between the connector terminals of the smart key computer ASSY (collation ECM) on the vehicle side.

Standard value

Terminal No. (Terminal symbol)	Input/Output	Item	Inspection conditions	Standard value
D48-2 (+B) ←→D48-11	Input	Voltage	Always	11 to 14V
D48-11 (GND) ←→chassis ground	-	Resistance	Always	Less than 1 Ω

NOTE: If it is out of the standard value, it can be judged as malfunction of the vehicle.

Connect the connector D48 of the smart key computer ASSY (collation ECM).

Measure the voltage between the connector terminals.

Standard value

Terminal No. (Terminal symbol)	Input/Output	Item	Inspection conditions	Standard value
D41-16 (SWIL) ←→D41-24 (AGND)	Output	Voltage	Push button start switch ON →OFF	11 to 14V →Less than 1V
D41-5 (IG2) ←→Chassis ground	Input	Voltage	IG ON	11 to 14V

NOTE: If the measured value is not within the range of the standard value, it can be determined that the smart key computer ASSY (collation ECM) has a fault.