Inspection steps
WARNING: This page is about a different car, the 2018 Subaru BRZ. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
- The entry & start system uses the CAN communication. Before performing troubleshooting, perform the inspection in "How to trouble-shoot", 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) )
- Check that no DTC is output. If any DTC is output, proceed to "List of diagnostic codes". (Refer to DIAGNOSTIC TROUBLE CODE CHART )
- If the entry & start system has been disabled by the entry & start system customize settings, enable it before performing troubleshooting. (Refer to CUSTOMIZE PARAMETERS )
- Before performing the following inspection steps, check the fuses related to this system.
- After finishing repair, check that the problem doesn't occur again.
- Checking the harnesses and connectors (collation ECM (smart key ECM ASSY) - IG2 relay)
- Remove the D48 connector of the collation ECM (smart key ECM ASSY).
- Remove the IG2 relay from the engine compartment relay block.
- Measure the resistance according to the following table.STANDARD VALUE SPECIFICATION - RESISTANCE
Tester display Inspection conditions Standard value D48-9 (IG2D) - IG2 relay terminal 2 Always 1 Ω or less IG2 relay terminal 1 -chassis ground Always 1 Ω or less OK: Go to next step
NG: Repair or replacement of the harnesses or connectors
- Unit inspection of the IG2 relay
- Inspect the IG2 relay unit.
OK: Go to next step
NG: Replacement of the IG2 relay
- Inspect the IG2 relay unit.
- Checking the harnesses and connectors (collation ECM - instrument panel junction block ASSY)
- Remove the D41 connector of the collation ECM (smart key ECM ASSY).
- Remove the 3A connector of the instrument panel junction block ASSY
- Measure the resistance according to the following table.STANDARD VALUE SPECIFICATION - RESISTANCE
Tester display Inspection conditions Standard value D41-6 (IG1D) - 3A-15 Always 1 Ω or less 3A-12 - chassis ground Always 1 Ω or less OK: Go to next step
NG: Repair or replacement of the harnesses or connectors
- Unit inspection of the instrument panel junction block ASSY (IG1 NO. 1, IG1 NO. 2, IG1 NO. 3, IG1 NO. 4 relay)
- Remove the instrument panel junction block ASSY
- Remove the main body ECM (multiplex network body ECM) from the instrument panel junction block ASSY.
- Measure the resistance according to the following table.STANDARD VALUE SPECIFICATION - RESISTANCE
Inspection terminals Inspection conditions Standard value 3E-1 - 3C-35 Battery voltage is not applied to terminals 3A-15 and 3A-12. 10 kΩ or more Battery voltage is applied to terminals 3A-15 and 3A-12. 1 Ω or less 3E-1 - 3C-34 Battery voltage is not applied to terminals 3A-15 and 3A-12. 10 kΩ or more Battery voltage is applied to terminals 3A-15 and 3A-12. 1 Ω or less 3E-1 - 3A-32 Battery voltage is not applied to terminals 3A-15 and 3A-12. 10 kΩ or more Battery voltage is applied to terminals 3A-15 and 3A-12. 1 Ω or less 3E-1 - 3A-3 Battery voltage is not applied to terminals 3A-15 and 3A-12. 10 kΩ or more Battery voltage is applied to terminals 3A-15 and 3A-12. 1 Ω or less OK: Go to next step
NG: Replacement of the instrument panel junction block ASSY
- Inspection of the collation ECM (smart key ECM ASSY)
- Reconnect the D41 and the D48 connectors of the collation ECM (smart key ECM ASSY).
- Measure the voltage according to the following table.
Voltage
STANDARD VALUE SPECIFICATIONInspection terminals Inspection conditions Standard value D41-6 (IG1D) - chassis ground ACC ON →IG ON 1V or less →9 V or more D48-9 (IG2D) - chassis ground ACC ON →IG ON 1V or less →9 V or more OK: Go to next step
NG: Replacement of the collation ECM (smart key computer ASSY)
Checking the circuits connected to the relay