How To Proceed With Troubleshooting
WARNING: This page is about a different car, the 2014 Subaru BRZ. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
- Use these procedures to troubleshoot the engine immobiliser system.
- *: Use the SSM3.
- VEHICLE BROUGHT TO WORKSHOP
NEXT
- INSPECT BATTERY VOLTAGE
Standard voltage: 11 to 14 V
If the voltage is below 11V, recharge or replace the battery before proceeding.
NOTE: A simple method to determine whether the battery is depleted is to operate the horn.NEXT
- TURN ENGINE SWITCH ON (IG)
NEXT
- Communication function inspection of the CAN communication system
- Check CAN communication system. (Refer to
HOW TO TROUBLESHOOT
)RESULT
Result Proceed to Functioning properly A Not functioning properly B B: Go to "CAN communication system (HOW TO TROUBLESHOOT )" (Refer to HOW TO TROUBLESHOOT ).
A: Go to Next Step
- Check CAN communication system. (Refer to
HOW TO TROUBLESHOOT
)
- Communication function inspection of large-scale multiplex communication system for vehicle body [LIN]
- Perform a function check of the large-scale multiplex communication system for vehicle body [LIN] to see that no abnormal condition is present in the communication system. (Refer to
HOW TO TROUBLESHOOT
)RESULT
Result Proceed to Functioning properly A Not functioning properly B B: To Large-scale multiplex communication system for vehicle body [LIN] (How to troubleshoot) (Refer to HOW TO TROUBLESHOOT )
A: Go to Next Step
- Perform a function check of the large-scale multiplex communication system for vehicle body [LIN] to see that no abnormal condition is present in the communication system. (Refer to
HOW TO TROUBLESHOOT
)
- CHECK FOR DTC (ENTRY AND START SYSTEM)*
- Check for DTCs and make a note of any codes that are output.
- Clear the DTCs. (Refer to DTC CHECK / CLEAR )
- Recheck for DTCs. Based on the DTCs output above, try to duplicate the engine immobiliser system DTC or steering lock system DTC by simulating the symptoms indicated by the DTCs.RESULT
Result Proceed to DTC is not output A Steering lock system DTC is output (DTC B2781, B2782 or B2788) B Engine immobiliser system DTC is output (except DTC B2781, B2782 and B2788) C B: Go to "steering lock system (List of diagnostic codes)" (Refer to LIST OF DIAGNOSTIC CODES )
C: GO TO DIAGNOSTIC TROUBLE CODE CHART
A: Go to Next Step
- CHECK FOR DTC (ECD SYSTEM OR EFI SYSTEM)*
- Clear the DTCs. (Refer to DTC CHECK / CLEAR )
- Check for DTCs. (Refer to DTC CHECK / CLEAR
)NOTE: The DTCs for the engine immobiliser system are specified above. If other codes are output, check the DTC chart for the EFI system.RESULT
Result Proceed to DTC is not output A Engine immobiliser system DTC is output (DTC B2799, B279A or B279C) B EFI system DTC is output) C B: GO TO DIAGNOSTIC TROUBLE CODE CHART
C: To EFI system (list of diagnostic codes) (Refer to DTC TABLE )
A: Go to Next Step
- PROBLEM SYMPTOMS TABLE
- Refer to PROBLEM SYMPTOMS TABLE .RESULT
Result Proceed to Fault is not listed in problem symptoms table A Fault is listed in problem symptoms table B B: Go to step 10
A: Go to Next Step
- Refer to PROBLEM SYMPTOMS TABLE .
- OVERALL ANALYSIS AND TROUBLESHOOTING*
- Check current data display & save / system operation check mode. (Refer to CURRENT DATA DISPLAY & SAVE / SYSTEM OPERATION CHECK MODE )
- Check Terminals of ECU. (Refer to ECM TERMINAL ARRANGEMENT
)
NEXT
- ADJUST, REPAIR OR REPLACE
NEXT
- CHECK FOR DTC*
- Clear the DTCs. (Refer to DTC CHECK / CLEAR )
- Check for DTCs. (Refer to DTC CHECK / CLEAR
)NOTE: Before checking for DTCs, perform the "DTC Output Confirmation Operation" of each diagnostic procedure. (Refer to DIAGNOSTIC TROUBLE CODE CHART )RESULT
Result Proceed to DTC is not output A Engine immobiliser system DTC is output B B: GO TO DIAGNOSTIC TROUBLE CODE CHART
A: END