Toyota CH-R Service Manual: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
NOTICE:
- Before replacing the main body ECU (multiplex network body ECU), refer
to REGISTRATION*1.
Click here
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*1: w/ Smart Key System
- When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
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.
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Theft deterrent system cannot be set |
Immobiliser system (w/ Smart Key System)" security indicator light does not blink" |
|
|
Immobiliser system (w/o Smart Key System)" security indicator light does not blink" |
|
|
|
ACC signal circuit |
|
|
|
IG signal circuit |
|
|
|
Door unlock detection switch circuit |
|
|
|
Door courtesy switch circuit |
|
|
|
Back door courtesy switch circuit |
|
|
|
Engine hood courtesy switch circuit |
|
|
|
Unlock warning switch circuit (w/o Smart Key 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) |
|
|
|
Security indicator light does not blink when theft deterrent system is set |
Immobiliser system (w/ Smart Key System)" security indicator light does not blink" |
|
|
Immobiliser system (w/o Smart Key System)" security indicator light does not blink" |
|
|
|
Theft deterrent system cannot be unset by turning the engine on. |
Replace the main body ECU (multiplex network body ECU) |
|
|
Theft deterrent system can be set even when door is open |
Door courtesy switch circuit |
|
|
Back door courtesy switch 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) |
|
|
|
Theft deterrent system can be set even when hood is open |
Engine hood courtesy switch circuit |
|
|
Vehicle horns do not sound while theft deterrent system is in alarm sounding state |
Horn circuit |
|
|
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) |
|
|
|
Security horn does not sound while theft deterrent system is in alarm sounding state |
Security horn circuit |
|
|
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) |
|
|
|
The vehicle does not enter the alarm sounding state as the battery is reconnected |
Check the battery |
|
|
Power Source Circuit |
|
|
|
The warning sounds itself |
Improper Operation |
|
Customize Parameters
CUSTOMIZE PARAMETERS
CUSTOMIZE THEFT DETERRENT SYSTEM
NOTICE:
When the customer requests a change in a function, first make sure that
the function can be customized.
Be sure to make ...
Terminals Of Ecu
TERMINALS OF ECU
CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK
BODY ECU)
*A
Main Body ECU (Multiplex Network Body ECU) with 2 Connecto ...
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CAUTION / NOTICE / HINT
HINT:
Use the same procedure for the driver side and front passenger side.
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Toyota C-HR (AX20) 2023-2026 Owner's Manual
Toyota CH-R Owners Manual
- For safety and security
- Instrument cluster
- Operation of each component
- Driving
- Interior features
- Maintenance and care
- When trouble arises
- Vehicle specifications
- For owners
Toyota CH-R Service Manual
- Introduction
- Maintenance
- Audio / Video
- Cellular Communication
- Navigation / Multi Info Display
- Park Assist / Monitoring
- Brake (front)
- Brake (rear)
- Brake Control / Dynamic Control Systems
- Brake System (other)
- Parking Brake
- Axle And Differential
- Drive Shaft / Propeller Shaft
- K114 Cvt
- 3zr-fae Battery / Charging
- Networking
- Power Distribution
- Power Assist Systems
- Steering Column
- Steering Gear / Linkage
- Alignment / Handling Diagnosis
- Front Suspension
- Rear Suspension
- Tire / Wheel
- Tire Pressure Monitoring
- Door / Hatch
- Exterior Panels / Trim
- Horn
- Lighting (ext)
- Mirror (ext)
- Window / Glass
- Wiper / Washer
- Door Lock
- Heating / Air Conditioning
- Interior Panels / Trim
- Lighting (int)
- Meter / Gauge / Display
- Mirror (int)
- Power Outlets (int)
- Pre-collision
- Seat
- Seat Belt
- Supplemental Restraint Systems
- Theft Deterrent / Keyless Entry
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