| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001HAPH |
| Model Year Start: 2020 | Model: Corolla | Prod Date Range: [01/2019 - 09/2022] |
| Title: THEFT DETERRENT / KEYLESS ENTRY: THEFT DETERRENT SYSTEM (for HV Model): PROBLEM SYMPTOMS TABLE; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022] | ||
PROBLEM SYMPTOMS TABLE
NOTICE:
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
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![2020 MY Corolla Corolla HV [01/2019 - 04/2020]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION](/t3Portal/stylegraphics/info.gif)
HINT:
- Troubleshooting of the theft deterrent system is based on the premise that the power door lock control system and the wireless door lock control system are operating normally. Accordingly, before troubleshooting the theft deterrent system, first make certain that the power door lock control system and the wireless door lock control system are operating normally.
- 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.
Theft Deterrent System
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Theft deterrent system cannot be set |
Refer to "Security Indicator Light Does not Blink" |
|
|
Refer to "Front Door Courtesy Switch Circuit" |
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|
Refer to "Rear Door Courtesy Switch Circuit" |
|
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|
Refer to "Luggage compartment Door Courtesy Switch Circuit" |
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Front door lock with motor assembly |
|
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|
Rear door lock with motor assembly |
|
|
|
Luggage compartment door lock assembly |
|
|
|
Refer to "Engine Hood Courtesy Switch Circuit" |
|
|
|
Security indicator light does not blink when theft deterrent system is set |
Refer to "Security Indicator Light Does not Blink" |
|
|
Alarm sounding state cannot be canceled when power switch is turned on (IG) |
Refer to "Smart Key System (for Start Function)" |
|
|
Certification ECU (Smart key ECU assembly) |
- |
|
|
If the symptom(s) still occur after the above areas are inspected and proved to be normal, replace the main body ECU (multiplex network body ECU) |
|
|
|
Theft deterrent system can be set even when door is open |
Refer to "Front Door Courtesy Switch Circuit" |
|
|
Refer to "Rear Door Courtesy Switch Circuit" |
|
|
|
Refer to "Luggage compartment Door Courtesy Switch Circuit" |
|
|
|
If the symptom(s) still occur after the above areas are inspected and proved to be normal, replace the main body ECU (multiplex network body ECU) |
|
|
|
Theft deterrent system can be set even when engine hood is open |
Refer to "Engine Hood Courtesy Switch Circuit" |
|
|
Vehicle horn does not sound while theft deterrent system is in alarm sounding state |
Refer to "Horn Circuit" |
|
|
Security horn does not sound while theft deterrent system is in alarm sounding state |
Refer to "Security Horn Circuit" |
|
|
Low beams do not blink while theft deterrent system is in alarm sounding state |
Refer to "Lighting System" |
|
|
If the symptom(s) still occur after the above area is inspected and proved to be normal, replace the main body ECU (multiplex network body ECU) |
|
|
|
Taillights do not blink while theft deterrent system is in alarm sounding state |
Refer to "Taillight Relay Circuit" |
|
|
If the symptom(s) still occur after the above area is inspected and proved to be normal, replace the main body ECU (multiplex network body ECU) |
|
|
|
Hazard warning lights do not flash while theft deterrent system is in alarm sounding state |
Combination meter assembly |
- |
|
If the symptom(s) still occur after the above area is inspected and proved to be normal, replace the main body ECU (multiplex network body ECU) |
|
|
|
Interior lights does not light up while theft deterrent system is in alarm sounding state |
Refer to "Interior Light Circuit" |
|
|
If the symptom(s) still occur after the above area is inspected and proved to be normal, replace the main body ECU (multiplex network body ECU) |
|
|
|
Low beams blink even when theft deterrent system is not set |
Refer to "Lighting System" |
|
|
If the symptom(s) still occur after the above area is inspected and proved to be normal, replace the main body ECU (multiplex network body ECU) |
|
|
|
Taillights blink even when theft deterrent system is not set |
Refer to "Taillight Relay Circuit" |
|
|
If the symptom(s) still occur after the above area is inspected and proved to be normal, replace the main body ECU (multiplex network body ECU) |
|
|
|
Hazard warning lights flash even when theft deterrent system is not set |
Combination meter assembly |
- |
|
If the symptom(s) still occur after the above area is inspected and proved to be normal, replace the main body ECU (multiplex network body ECU) |
|
|
|
Interiors light comes on even when theft deterrent system is not set |
Refer to "Interior Light Circuit" |
|
|
If the symptom(s) still occur after the above area is inspected and proved to be normal, replace the main body ECU (multiplex network body ECU) |
|
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|
The vehicle does not enter the alarm sounding state as the auxiliary battery is reconnected |
Check the auxiliary battery |
|
|
Refer to "Power Source Circuit" |
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