How To Troubleshoot

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.

Bring in the car
Next
Interview and phenomenon check
Next
Check battery voltage
1. Check the battery voltage.
  Voltage: 11 to 14 V
  
  NOTE: If the battery voltage is less than 11 V, recharge or replace the battery before starting the diagnostic procedures.
  
  Next

Diagnostic code and freeze frame data check (Refer to FREEZE FRAME DATA )

Check and record the diagnostic code and the freeze frame data.
Clear the diagnostic code and the freeze frame data.
Diagnostic code list recheck
1. Based on the recorded diagnostic code and the freeze frame data, reproduce the malfunction and check the diagnosis code again.
  NOTE:
  - When a diagnostic code is output, refer to "LIST OF DIAGNOSTIC CODES ".
  - If an error code for CAN communication system is output, first troubleshoot CAN communication and repair it. (Refer to DTC U0073 CAN FAILURE. A SYSTEM BUS OFF DETECTION; DTC U0100 ENGINE DATA, NOT RECEIVED; DTC U0101 TRANSMISSION DATA, NOT RECEIVED; DTC U0126 STEERING ANGLE SENSOR DATA, NOT RECEIVED )
  - If SSM3 cannot communicate with skid control computer (brake actuator Assembly), check CAN communication. (Refer to HOW TO TROUBLESHOOT )
  - If there is no respond from the skid control computer (brake actuator Assembly), check the power and voltage input circuit for the skid control computer (brake actuator Assembly). (Refer to DTC C1241 POWER SUPPLY VOLTAGE ERROR )

RESULT

Result	Go to
Diagnostic code is not output. Malfunction can be checked and reproduced.	A
Diagnostic code is output.	B
Diagnostic code is not output. Malfunction cannot be checked and reproduced.	C

B: Refer to "LIST OF DIAGNOSTIC CODES " and perform troubleshooting for each code. Then go to step 7.

C: Go to "Malfunction simulation (IN-32)".

A: Go to Next Step

Symptom table (refer to SYMPTOM TABLE )

RESULT

Result	Go to
Not applicable to the symptom table.	A
Applicable to the symptom table.	B

B: Perform troubleshooting for relevant symptom and go to step 8.

A: Go to Next Step

Perform troubleshooting in the following procedures according to the trouble phenomenon.
1. Current Data Display & save (Refer to [CURRENT DATA DISPLAY & SAVE] )
2. Function inspection (Refer to FUNCTION INSPECTION )
3. ECM terminal arrangement (Refer to ECM TERMINAL ARRANGEMENT )
  Next
Adjustment, repair, or replacement
Next
Confirmation test
Next: Complete