Toyota Corolla Cross: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
NOTICE:
- Before replacing the main body ECU (multiplex network body ECU) or certification ECU (smart key ECU assembly)*1, refer to Registration.
- *1: w/ Smart Key System
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 |
- | |
| Switch illumination or down light does not illuminate (Other interior lights are normal) |
Map light assembly |
|
|
Switch illumination and down light do not illuminate (Other interior lights are normal) |
Map light assembly |
|
|
Harness or connector |
- |
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|
Symptom | Suspected Area |
Link |
|---|---|---|
|
Room light does not illuminate (Other interior lights are normal) |
No. 1 room light assembly |
|
|
Harness or connector |
- |
|
Symptom | Suspected Area |
Link |
|---|---|---|
|
Vanity light LH does not illuminate (Other interior lights are normal) |
Visor assembly LH |
|
|
Harness or connector (Including bulb holder of the vanity light assembly that are part of the wire harness) |
- | |
|
Vanity light RH does not illuminate (Other interior lights are normal) |
Visor assembly RH |
|
|
Harness or connector (Including bulb holder of the vanity light assembly that are part of the wire harness) |
- |
|
Symptom | Suspected Area |
Link |
|---|---|---|
|
Luggage compartment light does not illuminate (Other interior lights are normal) |
No. 1 luggage compartment light assembly |
|
|
Back door courtesy switch circuit |
| |
|
Harness or connector |
- | |
| Main body ECU (Multiplex network body ECU) |
|
|
Symptom | Suspected Area |
Link |
|---|---|---|
| Front Door Trim Illumination does not illuminate |
Ambient illumination light circuit |
|
|
Symptom | Suspected Area |
Link |
|---|---|---|
| Center Tray illumination light does not illuminate |
Ambient illumination light circuit |
|
|
Symptom | Suspected Area |
Link |
|---|---|---|
| All the interior lights that receive power via the DOME CUT relay do not illuminate |
Interior light auto cut 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*2 |
|
|
CAN communication system*3 |
| |
|
Smart key system (for Entry Function)*2 |
| |
|
Smart key system (for Entry Function)*3 |
| |
|
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 |
|
|
Rear 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*2 |
|
|
CAN communication system*3 |
| |
|
Push Start Switch Illumination Circuit |
| |
|
Shift position-linked control does not operate when shift lever is operated |
Check customize settings (Light Control Function) |
|
|
CAN communication system*2 |
| |
|
CAN communication system*3 |
| |
|
Main body ECU (Multiplex network body ECU) |
|
- *1: w/ Smart Key System
- *2: for HEV Model
- *3: for Gasoline Model
|
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 |
- |
READ NEXT:
Terminals Of Ecu
TERMINALS OF ECU CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND POWER DISTRIBUTION BOX ASSEMBLY
(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assem
Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST NOTICE:
In the following table, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whethe
IG Signal Circuit
DESCRIPTION This circuit detects the ignition switch ON or off condition, and sends it to the main body ECU (multiplex network body ECU). WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspec
SEE MORE:
Hybrid Transaxle Fluid
Components
COMPONENTS
ILLUSTRATION
*1
NO. 1 ENGINE UNDER COVER ASSEMBLY
*2
FILLER PLUG
*3
DRAIN PLUG
*4
GASKET
N*m (kgf*cm, ft.*lbf): Specified torque
●
Room Temperature Sensor
RemovalREMOVAL CAUTION / NOTICE / HINT COMPONENTS (REMOVAL)
Procedure Part Name Code
1 LOWER CENTER INSTRUMENT PANEL FINISH PANEL
55434F -
- -
2 COOLER THERMISTOR (ROOM TEMPERATURE SENSOR)
88625Q -
- - PROCEDURE
1.
