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Home › Subaru › 2013 › BRZ Limited, Automatic Trans › Repair and Diagnosis › External Pages › Different car › Section 106 (Lighting System (Interior)) › Lighting System › Symptom Table

Symptom Table

WARNING: This page is about a different car, the 2019 Subaru BRZ. However, it is still accessible from the selected car via links, so may be relevant.

Illuminated entry system

Symptoms Inspection items Reference
The lights do not properly illuminate in all the operating conditions. Interior illumination circuit INTERIOR ILLUMINATION CIRCUIT 
Main body ECM (multiplex network body computer) MAIN BODY ECM
The light control does not work with the door open/close operations. Front door courtesy light switch circuit FRONT DOOR COURTESY LIGHT SWITCH CIRCUIT 
Main body ECM (multiplex network body computer) MAIN BODY ECM
The light control does not work with the door lock operation. Main body ECM (multiplex network body computer) MAIN BODY ECM
The light control does not operate when entering the smart detection area. CAN communication system check HOW TO TROUBLESHOOT
Operation check of the smart entry & start system (smart entry function) ENTRY & START SYSTEM (ENTRY FUNCTION)
Main body ECM (multiplex network body computer) MAIN BODY ECM
The light control does not work when operating the push button start switch (1) or the ignition switch ASSY (2). IG signal circuit IG SIGNAL CIRCUIT 
ACC signal circuit ACC SIGNAL CIRCUIT 
Main body ECM (multiplex network body computer) MAIN BODY ECM
The push button start switch (text illumination) does not illuminate. (1) CAN communication system check CAN COMMUNICATION SYSTEM
Engine switch illumination circuit ENGINE SWITCH ILLUMINATION CIRCUIT 
Smart key computer ASSY (collation ECM) -
(1) When there is a smart entry & start system

(2) When there is no smart entry & start system

Map light ASSY

Symptoms Inspection items Reference
The map light ASSY does not illuminate. Bulb -
Map light ASSY UNIT INSPECTION 
Vehicle wiring harness and connector -

Vanity light ASSY

Symptoms Inspection items Reference
The vanity light ASSY does not illuminate. Bulb -
Visor ASSY UNIT INSPECTION 
Wiring harness or connector (including bulb holder) -

Courtesy light ASSY

Symptoms Inspection items Reference
The courtesy light ASSY does not illuminate. Bulb -
Courtesy light ASSY UNIT INSPECTION 
Front door courtesy light switch ASSY UNIT INSPECTION 
Front door courtesy light switch circuit FRONT DOOR COURTESY LIGHT SWITCH CIRCUIT 
Door courtesy light circuit DOOR COURTESY LIGHT CIRCUIT 
Vehicle wiring harness and connector -
Main body ECM (multiplex network body computer) MAIN BODY ECM

Battery saver

Symptoms Inspection items Reference
The battery saver does not work. IG signal circuit IG SIGNAL CIRCUIT 
ACC signal circuit ACC SIGNAL CIRCUIT 
Front door courtesy light switch circuit FRONT DOOR COURTESY LIGHT SWITCH CIRCUIT 
CAN communication system check CAN COMMUNICATION SYSTEM
Main body ECM (multiplex network body computer) -
(1) When there is a smart entry & start system

Transponder key amplifier (key cylinder light)

Symptoms Inspection items Reference
The transponder key amplifier (key cylinder light) does not illuminate. (1) Transponder key amplifier (key cylinder light) TRANSPONDER KEY AMPLIFIER
Ignition key cylinder light circuit IGNITION KEY CYLINDER LIGHT CIRCUIT 
Vehicle wiring harness and connector -
Main body ECM (multiplex network body computer) MAIN BODY ECM
(1) When there is no smart entry & start system

Trunk room light

Symptoms Inspection items Reference
The trunk room light doesn't turn on. Bulb -
Trunk room light TRUNK ROOM LIGHT 
Trunk courtesy light switch circuit TRUNK COURTESY LIGHT SWITCH CIRCUIT 
Vehicle wiring harness and connector -
Instrument panel junction block ASSY MAIN BODY ECM
Main body ECM (multiplex network body computer) MAIN BODY ECM
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