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Home >> Subaru >> 2019 >> BRZ Limited, Automatic Trans >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Engine Immobilizer System (W/ Entry Start) (Diagnostics And Symptom Tests) >> Engine Immobilizer System (With Entry & Start System) >> Problem Symptoms Table

Problem Symptoms Table

NOTE:
  • Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
  • Inspect the fuses and relays related to this system before inspecting the suspected areas below.
  • If the problem only occurs in certain locations or at certain times of day, check for wave interference.
  • If the vehicle components are added, check for wave interference from the added components.
SYMPTOM DESCRIPTION - ENGINE IMMOBILISER SYSTEM

Symptom Suspected Area See
Engine cannot be started(1) Certification ECU (smart key ECU assembly) -
Engine cannot be started(2) ID code box (immobiliser code ECU)(1) DIAGNOSIS SYSTEM 
ECM DIAGNOSIS SYSTEM 
EFI system DIAGNOSIS SYSTEM 
Power source mode cannot be changed(2) Engine switch DIAGNOSIS SYSTEM 
Certification ECU (smart key ECU assembly) TD-248
Steering lock lock/unlock not possible(3) Steering lock actuator assembly (steering lock ECU) DIAGNOSIS SYSTEM 
(1) w/ID Code Box

(2) Refer to Problem Symptoms Table for Entry and Start System (for Start Function) (Refer to PROBLEM SYMPTOMS TABLE )

(3) Refer to Problem Symptoms Table for Steering Lock System (Refer to LIST OF DIAGNOSTIC CODES )
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