Toyota Yaris: Lighting System / Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
NOTICE:
Before replacing the main body ECU (multiplex network body ECU) or certification ECU (smart key ECU assembly), refer to Registration.
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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.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
| Symptom | Suspected Area | Link |
|---|---|---|
| Map light LH or map light RH does not illuminate (Other interior lights are normal) | Map light assembly |
|
| Map light LH and map light RH do not illuminate (Other interior lights are normal) | Map light assembly |
|
| Harness or connector | - |
| Symptom | Suspected Area | Link |
|---|---|---|
| Room light does not illuminate (Other interior lights are normal) | Bulb |
|
| Room light assembly |
| |
| Harness or connector | - |
| Symptom | Suspected Area | Link |
|---|---|---|
| Front Door Trim Illumination does not illuminate | Ambient illumination light circuit |
|
| Symptom | Suspected Area | Link |
|---|---|---|
| All illuminated entry system control functions do not operate under any condition | Interior light auto cut circuit |
|
| Interior Light Circuit |
| |
| Main body ECU (Multiplex network body ECU) |
| |
| Actuation area-linked control function does not operate when registered key is brought into any exterior detection area*1 | CAN communication system |
|
| Entry and start system (for Entry Function) |
| |
| Main body ECU (Multiplex network body ECU) |
| |
| Door lock/unlock-linked control function does not operate when doors are locked/unlocked | Check customize settings (Interior Lights ON when Door Unlocked Function) |
|
| Door Unlock Detection Switch Circuit |
| |
| Main body ECU (Multiplex network body ECU) |
| |
| Door open/close-linked control function does not operate when doors are opened/closed | Front door courtesy switch circuit |
|
| Back door courtesy switch circuit |
| |
| Main body ECU (Multiplex network body ECU) |
| |
| Push start switch-linked control function does not operate when push start switch is operated*1 | Check customize settings (Interior Lights ON when IG OFF Function) |
|
| IG signal circuit |
| |
| Main body ECU (Multiplex network body ECU) |
| |
| Push start switch illumination does not illuminate*1 | CAN communication system |
|
| Push Start Switch Illumination Circuit |
| |
| Shift position-linked control does not operate when shift lever is operated*4 | Check customize settings (Light Control Function) |
|
| CAN communication system |
| |
| Main body ECU (Multiplex network body ECU) |
|
| Symptom | Suspected Area | Link |
|---|---|---|
| Auxiliary battery saving function does not operate | Check illuminated entry system |
|
| Main body ECU (Multiplex network body ECU) |
|
| Symptom | Suspected Area | Link |
|---|---|---|
| No instrument panel illumination lights come on (taillights operate normally). | Instrument Panel Illumination does not Turn On |
|
| Harness or connector | - |
Customize Parameters
CUSTOMIZE PARAMETERS CUSTOMIZE LIGHTING SYSTEM (INT) NOTICE:
When the customer requests a change in a function, first make sure that the function can be customized...
Terminals Of Ecu
TERMINALS OF ECU CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND POWER DISTRIBUTION BOX ASSEMBLY
*1 Power Distribution Box Assembly *2 Main Body ECU (Multiplex Network Body ECU) (a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly...
Other information:
Toyota Yaris XP210 (2020-2025) Owner's Manual: Antilock Brake System (ABS)
The ABS control unit continuously monitors the speed of each wheel. If one wheel is about to lock up, the ABS responds by automatically releasing and reapplying that wheel’s brake. The driver will feel a slight vibration in the brake pedal and may hear a chattering noise from the brake system...
Toyota Yaris XP210 (2020-2025) Reapir and Service Manual: Terminals Of Ecu
TERMINALS OF ECU CHECK AWD ECU ASSEMBLY (a) Measure the voltage and resistance of the connector. Terminal No. (Symbol) Terminal Description Condition Specified Condition O119-1 (GND) - Body ground Ground Always Below 1 Ω O119-2 (BSLC) - O119-1 (GND) AWD ECU assembly power supply Always 11 to 14 V O119-13 (T1H) - O119-1 (GND) Temperature sensor (+) input Ignition switch ON 0...
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Refueling
Before refueling, close all the doors, windows, and the liftgate/trunk lid, and switch the ignition OFF.
To open the fuel-filler lid, pull the remote fuel-filler lid release.
