Toyota Yaris: Lighting System / Rear Fog Light Circuit
DESCRIPTION
The main body ECU (multiplex network body ECU) controls the rear fog light.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
Click here
.gif)
-
First, confirm that there is no malfunction in the power integration system. Refer to the How to Proceed with Troubleshooting procedure.
Click here
-
First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no CAN communication malfunctions before troubleshooting this symptom.
Click here
-
First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no CXPI communication malfunctions before troubleshooting this symptom.
Click here
PROCEDURE
| 1. | READ VALUE USING GTS |
(a) Turn the light control switch to the TAIL position.
(b) Turn the rear fog light switch on.
(c) Using the GTS, read the Data List.
Body Electrical > Power Distribution Box > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Rear Fog Light Fuse Shut Off Status | Rear fog light fuse condition | OFF or ON | OFF: Rear fog light fuse not shut off ON: Rear fog light fuse shut off | - |
| Tester Display |
|---|
| Rear Fog Light Fuse Shut Off Status |
OK:
The Data List value displays "OFF".
| NG |
.gif) | GO TO STEP 3 |
|
.gif)
| 2. | READ VALUE USING GTS |
(a) Using the GTS, read the Data List.
Body Electrical > Power Distribution Box > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Rear Fog Light Output Signal | Rear fog light output | OFF or ON | OFF: Rear fog light is not output ON: Rear fog light is output | - |
| Tester Display |
|---|
| Rear Fog Light Output Signal |
OK:
Display changes according to the rear fog light switch operation.
| OK |
| REPLACE POWER DISTRIBUTION BOX ASSEMBLY |
| NG |
| REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
| 3. | INSPECT REAR FOG LIGHT ASSEMBLY |
(a) Disconnect the W8 rear fog light LED connector.
(b) Turn the rear fog light switch off.
(c) Turn the rear fog light switch on.
(d) Using the GTS, read the Data List.
Body Electrical > Power Distribution Box > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Rear Fog Light Fuse Shut Off Status | Rear fog light fuse condition | OFF or ON | OFF: Rear fog light fuse not shut off ON: Rear fog light fuse shut off | - |
OK:
The Data List value displays "OFF".
| OK |
| REPLACE REAR FOG LIGHT ASSEMBLY |
|
| 4. | CHECK HARNESS AND CONNECTOR |
(a) Disconnect the W8 rear fog light LED connector.
(b) Disconnect the cable from the negative (-) auxiliary battery terminal.
(c) Disconnect the 4E power distribution box assembly connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| W8-2 (B) or 4E-7 - Body ground | Always | 10 kΩ or higher |
| OK |
| REPLACE POWER DISTRIBUTION BOX ASSEMBLY |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
Front Fog Light Circuit
DESCRIPTION The main body ECU (multiplex network body ECU) controls the front fog lights. WIRING DIAGRAM
CAUTION / NOTICE / HINT NOTICE:
Before replacing the main body ECU (multiplex network body ECU), refer to Registration...
Hazard Warning Switch Circuit
DESCRIPTION The combination meter assembly receives the hazard warning signal switch assembly on signal and controls the operation of the hazard warning lights...
Other information:
Toyota Yaris XP210 (2020-2025) Reapir and Service Manual: Restarting after a Short Period of Time from an Idling Stop
DESCRIPTION Perform this procedure if the engine restarts after an abnormally short period of time after being stopped by the stop and start system. Regarding explanations of the features of stop and start system control: Click here PROCEDURE 1...
Toyota Yaris XP210 (2020-2025) Reapir and Service Manual: Headlight LH Circuit (B243900,B243A00)
DESCRIPTION The light control LED ECU supplies internally boosted voltage to the light control LED ECU LH so that the current supplied to the LED is always maintained at a constant value. These DTCs are also output when the main body ECU (multiplex network body ECU) detects malfunctions while monitoring the applied voltage...
Categories
- Manuals Home
- Toyota Yaris Owners Manual
- Toyota Yaris Service Manual
- G16e-gts (engine Mechanical)
- Opening and Closing the Liftgate/Trunk Lid
- Immobilizer System
- New on site
- Most important about car
Fuel Gauge
The fuel gauge shows approximately how much fuel is remaining in the tank when the ignition is switched ON. We recommend keeping the tank over 1/4 full.
