Inspection steps

CAUTION:

The entry & start system has functions that use the CAN communication. Before performing troubleshooting, perform the inspection in "How to troubleshoot", and check that there are no communication problems. (Refer to HOW TO PROCEED WITH TROUBLESHOOTING )
Before replacing the collation ECM (smart key ECM assembly), refer to "entry & start system (entry function)". (Refer to PARTS LOCATION )
After repair, perform the [DTC output confirmation operation], and check that the DTC is not output again.
Before performing the following inspection steps, check the fuses related to this system.

Checking the harnesses and connectors

Remove the D40 and the D48 connectors of the collation ECM (smart key ECM assembly).
Remove the A35 connector of the ECM.

Measure the resistance according to the following table.

Resistance

RESISTANCE REFERENCE

Inspection terminals	Inspection conditions	Standard value
D40-28 (ACCR) - A35-32(ACCR)	Always	1 Ωor less
D48-11 (GND) - chassis ground	Always	1 Ωor less
D40-28 (ACCR) - chassis ground	Always	10 kΩ or more

NG: Replacement of the harnesses or connectors

OK: Go to next step

Unit inspection of the collation ECM (smart key ECM assembly)

Reconnect the D41, D40, and D48 connectors of the collation ECM (smart key ECM assembly).
Reconnect the A35 connector of the ECM.

Measure the voltage according to the following table.

Fig 1: Collation ECM (Smart Key ECM Assembly) Connector Terminal Identification

Courtesy of SUBARU OF AMERICA, INC.

Voltage

VOLTAGE REFERENCE

Inspection terminals

Inspection conditions

Standard value

D40-28 (ACCR) - D48-11 (GND)⁽¹⁾

Depress the brake pedal ⁽¹⁾ or the clutch pedal ⁽²⁾ and press the engine switch (starter on)→ After approx. 1 second, the engine switch is released (starter off)

2V or less →9 V or more

⁽¹⁾	With automatic transmission

⁽²⁾	With manual transmission

NG: Replace the ECM

OK: Replacement of the collation ECM (smart key ECM assembly)