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: Perform all of steps to Step 9 in "How to troubleshoot" before performing this steps. (Refer to HOW TO TROUBLESHOOT )

Check DTC
1. Check the displayed DTC.
  Criteria: DTCs other than U**** are not output
NO: Perform the diagnosis according to the DTC.

YES: Go to next step
DTC check
1. Check the displayed DTC.
  Criteria: U0126 is output
NO: Go to "How to simulate trouble phenomenon" (Refer to MALFUNCTION SYMPTOMS AND DTC CHECK )

YES: Go to next step
Checking CAN communication circuit
1. Check CAN communication circuit. (Refer to CHECKING CAN COMMUNICATION CIRCUIT )
  Criteria: No fault is found.
NO Follow the repair procedure described in "CAN communication circuit check".

YES: Go to next step
DTC check
1. Use SSM4 to read DTC.
  Criteria: U0126 is output
NO: Go to "How to simulate trouble phenomenon" (Refer to MALFUNCTION SYMPTOMS AND DTC CHECK )

YES: Go to next step
DTC check
1. Use SSM4 to read DTCs of all the systems.
  Criteria: U0126 is not detected from the brake actuator ASSY.
NO: Replace the spiral cable SUB-ASSY.

YES: Go to next step
Replacement of the module
1. Replace the spiral cable SUB-ASSY.
2. Use SSM4 to read DTC.
  Criteria: U0126 is output
NO: System is normal.

YES: Go to next step
Replacement of the module
1. Reinstall the spiral cable SUB-ASSY.
2. Replace the module that DTC has been detected.
3. Use SSM4 to read DTC.
  Criteria: U0126 is output
NO: System is normal.

YES: Go to next step

Replace the spiral cable SUB-ASSY.