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. Start the engine.
2. Use SSM4 to read DTC detected on CAN system.
  Criteria: U0073 is output
NO: A temporary communication error may have occurred. Clear the memory.

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. Perform the inspection using DTC check sheet.
2. Use SSM4 to read DTC detected on CAN system.
  Criteria: U0073 is output
NO: System is normal.

YES: Go to next step
Control module check
1. Turn the ignition switch to OFF.
2. Disconnect the control modules in the proper sequence.
  NOTE: When disconnecting ECM or brake actuator ASSY, connect the resistance of 120 Obetween CAN-Hi and CAN-Lo to substitute a termination resistor.
3. Turn the ignition switch to ON.
4. Use SSM4 to read DTC detected on CAN system.
  Criteria: U0073 is no longer displayed
NO: Repeat Step 4 until U0073 is not detected.

YES: Go to next step

Replace the control module which has been removed when no DTC is output.