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 ASSY), refer to "entry & start system (entry function)". (Refer to Entry & start system (entry function) )
After repair, perform the [DTC output confirmation operation], and check that the DTC is not output.
Before performing the following inspection steps, check the fuses related to this system.

Checking the harnesses and connectors (collation ECM - ECM)

Remove the D48 connector of the collation ECM (smart key ECM ASSY).
Remove the A33 connector of the ECM.
Measure the resistance according to the following table.

RESISTANCE SPECIFICATION

Tester conditions	Inspection conditions	Standard value
D48-7 (STSW) - A33- 17 (START)	Always	1 Ωor less
D48-11 (GND) - Chassis ground	Always	1 Ωor less
D48-7 (STSW) - chassis ground	Always	10 kΩ or more

NG: Repair or replacement of the harnesses or connectors

OK: Go to Next Step.

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

Reconnect the D48 connector of the collation ECM (smart key ECM ASSY).
Reconnect the A33 connector of the ECM.

Measure the voltage according to the following table.

VOLTAGE SPECIFICATION

Inspection terminals

Inspection conditions

Standard value

D48-7 (STSW) - D48- 11 (GND)

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

Fig 1: Identifying Collation ECM (Smart Key ECM ASSY) Connectors

Courtesy of SUBARU OF AMERICA, INC.

Measure the voltage according to the following table.

NG: Replacement of the collation ECM (smart key ECM ASSY)

OK: Proceed to the "EFI system" ("How to troubleshoot")