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 (collation ECM - ECM)
- Remove the D48 connector of the collation ECM (smart key ECM assembly).
- Remove the A33 connector of the ECM.
- Measure the resistance according to the following table.
Resistance
RESISTANCE REFERENCETester 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 assembly)
- Reconnect the D48 connector of the collation ECM (smart key ECM assembly).
- Reconnect the A33 connector of the ECM.
- Measure the voltage according to the following table.
Voltage
VOLTAGE REFERENCEInspection 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 Courtesy of SUBARU OF AMERICA, INC.
Measure the voltage according to the following table.
NG: Replacement of the collation ECM (smart key ECM assembly)
OK: Proceed to the "EFI system" ("How to troubleshoot")