2019 Subaru WRX STIFACTORY OEM SERVICE PROCEDURE

Execution Condition

SECONDARY PARAMETERS AND EXECUTION CONDITION - JUDGMENT 1 (INSTRUCTION CHECK - A)

Secondary parameters Execution condition
Initial routine Main CPU Execution in progress
SECONDARY PARAMETERS AND EXECUTION CONDITION - JUDGMENT 1 (INSTRUCTION CHECK - B)

Secondary parameters Execution condition
Ignition switch ON
Battery voltage ≥ 6.2V
Electronic throttle control relay ON
SECONDARY PARAMETERS AND EXECUTION CONDITION - JUDGMENT 2 (SOFT FLOW CHECK)

Secondary parameters Execution condition
(2) Ignition switch ON
SECONDARY PARAMETERS AND EXECUTION CONDITION - JUDGMENT 3 (SOFT MONITOR CHECK)

Secondary parameters Execution condition
Ignition switch ON
Battery voltage ≥ 6.2V
Electronic throttle control relay ON
SECONDARY PARAMETERS AND EXECUTION CONDITION - JUDGMENT 4 (IF OUTPUT IC OPERATION IS ABNORMAL)

Secondary parameters Execution condition
Ignition switch ON
SECONDARY PARAMETERS AND EXECUTION CONDITION - JUDGMENT 5 (CAN REGISTER CHECK)

Secondary parameters Execution condition
(5) Initial routine Execution in progress
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.