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Home >> Toyota >> 2018 >> 86 Base, Automatic Trans >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Interior/Illumination Lights >> Lighting System (Int) - Diagnostics & Circuit Tests >> Lighting System >> Problem Symptoms Table [03/2017 - 12/2017] >> Problem Symptoms Table [03/2017 - 12/2017]
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Problem Symptoms Table [03/2017 - 12/2017]

HINT: 

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.

ILLUMINATED ENTRY SYSTEM (INTERIOR LIGHT CONTROL)

Symptom Suspected Area Link
Illuminated entry system does not operate Interior light circuit Refer to Interior Light Circuit [06/2016 - ] 
Main body ECU (Network gateway ECU) Refer to REMOVAL [06/2016 - ]
Harness or connector -
Illuminated entry system does not operate with door opening or closing operation Door courtesy switch circuit Refer to Door Courtesy Switch Circuit [06/2016 - ] 
Main body ECU (Network gateway ECU) Refer to REMOVAL [06/2016 - ]
Harness or connector -
Illuminated entry system does not operate with door lock or unlock operation Door unlock detection switch circuit*1 Refer to Door Unlock Detection Switch Circuit [03/2017 - ] 
Main body ECU (Network gateway ECU) Refer to REMOVAL [06/2016 - ]
Harness or connector -
Illuminated entry system does not operate with engine switch*1 or ignition or starter switch assembly*2 operation IG signal circuit Refer to IG Signal Circuit [03/2017 - ] 
ACC signal circuit Refer to ACC Signal Circuit [03/2017 - ] 
Main body ECU (Network gateway ECU) Refer to REMOVAL [06/2016 - ]
Harness or connector -
Engine switch illumination does not illuminate*1 CAN communication line Refer to DIAGNOSIS SYSTEM [03/2017 - ]
Engine switch illumination circuit Refer to Engine Switch Illumination Circuit [03/2017 - ] 
Certification ECU (Smart key ECU assembly) Refer to REMOVAL [03/2017 - ]
MAP LIGHT

Symptom Suspected Area Link
Map light assembly does not illuminate Bulb -
Map light assembly Refer to REMOVAL [06/2016 - ]
Harness or connector -
BATTERY SAVING CONTROL

Symptom Suspected Area Link
Battery saving function does not operate IG signal circuit Refer to IG Signal Circuit [03/2017 - ] 
ACC signal circuit Refer to ACC Signal Circuit [03/2017 - ] 
Door courtesy switch circuit Refer to Door Courtesy Switch Circuit [06/2016 - ] 
Door unlock detection switch circuit*1 Refer to Door Unlock Detection Switch Circuit [03/2017 - ] 
Main body ECU (Network gateway ECU) Refer to REMOVAL [06/2016 - ]
IGNITION KEY CYLINDER LIGHT

Symptom Suspected Area Link
Ignition Key Cylinder Light does not illuminate*1 Ignition key cylinder light (Transponder key amplifier) Refer to REMOVAL [03/2017 - ]
Ignition key cylinder light circuit Refer to Ignition Key Cylinder Light Circuit [06/2016 - ] 
Main body ECU (Network gateway ECU) Refer to REMOVAL [06/2016 - ]
Harness or connector -
LUGGAGE COMPARTMENT ROOM LIGHT

Symptom Suspected Area Link
Luggage compartment room light does not illuminate Bulb -
No. 1 luggage compartment light assembly Refer to REMOVAL [06/2016 - ]
Luggage compartment door courtesy switch circuit Refer to Luggage Compartment Door Courtesy Switch Circuit [06/2016 - ] 
Harness or connector -
Instrument panel junction block assembly Refer to REMOVAL [06/2016 - ]
Main body ECU (Network gateway ECU) Refer to REMOVAL [06/2016 - ]