Inspection steps

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.

CAUTION: Perform this procedure after performing until STEP 9 in "How to troubleshoot". (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
Check DTC
1. Check the displayed DTC.
  Criteria: No DTC indicating bus off or missing data is output
  
  NO: Perform the diagnosis according to the DTC.
  
  YES: Go to Next Step
Check DTC
1. Check the displayed DTC.
  Criteria: U0428 is output
  
  NO: Go to "How to simulate trouble phenomenon" (Refer to PROCEDURES FOR MALFUNCTION PHENOMENON SIMULATION )
  
  YES: Go to Next Step
Check DTC
1. Turn the ignition switch to OFF.
2. Disconnect the spiral cable sub-assembly connector.
3. Reconnect the disconnected connector and turn the ignition switch ON.
4. Use SSM3 to read DTC.
  Criteria: U0428 is output
  
  NO: Go to "How to simulate trouble phenomenon" (Refer to PROCEDURES FOR MALFUNCTION PHENOMENON SIMULATION )
  
  YES: Go to Next Step
Check DTC
1. Use SSM3 to read DTCs of all the systems.
  Criteria: U0428 is not detected from more than one module
  
  NO: Replace the spiral cable sub-assembly.
  
  YES: Go to Next Step
Replace the module
1. Replace the spiral cable sub-assembly.
2. Use SSM3 to read DTC.
  Criteria: U0428 is output
  
  NO: System is normal.
  
  YES: Go to Next Step
Replace the module
1. Reinstall the spiral cable sub-assembly.
2. Replace the module that DTC has been detected.
3. Use SSM3 to read DTC.
  Criteria: U0428 is output
  
  NO: System is normal.
  
  YES: Replace the spiral cable sub-assembly.