Toyota Yaris: Lighting System / High Beam Headlight Circuit
DESCRIPTION
The main body ECU (multiplex network body ECU) controls the high beam headlights.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
Click here
.gif)
-
Check the operation of the low beam headlights. If the low beam headlights do not operate normally, refer to Problem Symptoms Table.
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. | PERFORM ACTIVE TEST USING GTS |
(a) Enter the following menus: Body Electrical / Main Body / Active Test.
(b) Perform the Active Test according to the display on the GTS.
Body Electrical > Main Body > Active Test| Tester Display | Measurement Item | Control Range | Diagnostic Note |
|---|---|---|---|
| High Beam Headlight | High beam headlights | OFF or ON | - |
| Tester Display |
|---|
| High Beam Headlight |
OK:
High beam headlights illuminate.
| Result | Proceed to |
|---|---|
| OK | A |
| NG (LH side high beam light does not illuminate.) | B |
| NG (RH side high beam light does not illuminate.) | C |
| A |
.gif) | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| C |
| GO TO STEP 5 |
|
.gif)
| 2. | CHECK HARNESS AND CONNECTOR (HEADLIGHT UNIT ASSEMBLY LH - LIGHT CONTROL LED ECU LH) |
| *a | Component without harness connected (to Wire Harness) | *b | Component without harness connected (to Light Control LED ECU) |
| *c | Component without harness connected (to Headlight Unit Assembly LH) | - | - |
(a) Remove the headlight assembly LH.
Click here
(b) Remove the wire harness.
Click here
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A-[2] - B-[15] | Always | Below 1 Ω |
| A-[4] - B-[4] | Always | Below 1 Ω |
| A4-2 (LO) - B-[19] | Always | Below 1 Ω |
| A4-5 (E) - B-[8] | Always | Below 1 Ω |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 3. | CHECK LIGHT CONTROL LED ECU LH |
(a) Interchange the light control LED ECU LH with RH and connect the connectors to them.
Click here
|
| 4. | CHECK OPERATION (HIGH BEAM HEADLIGHT) |
(a) Check that the low beam headlight operates normally.
OK:
High beam headlight operates normally.
| OK |
| REPLACE LIGHT CONTROL LED ECU LH |
| NG |
| REPLACE HEADLIGHT UNIT ASSEMBLY LH |
| 5. | CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - LIGHT CONTROL ECU) |
| *a | Component without harness connected (to Wire Harness) | *b | Component without harness connected (to Light Control ECU) |
| *c | Component without harness connected (to Headlight Unit Assembly RH) | - | - |
(a) Remove the headlight assembly RH.
Click here
(b) Remove the wire harness.
Click here
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A-[2] - B-[15] | Always | Below 1 Ω |
| A-[4] - B-[4] | Always | Below 1 Ω |
| A5-2 (LO) - B-[19] | Always | Below 1 Ω |
| A5-5 (E) - B-[8] | Always | Below 1 Ω |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 6. | CHECK LIGHT CONTROL LED ECU RH |
(a) Interchange the light control LED ECU RH with LH and connect the connectors to them.
Click here
|
| 7. | CHECK OPERATION (HIGH BEAM HEADLIGHT) |
(a) Check that the low beam headlight operates normally.
OK:
High beam headlight operates normally.
| OK |
| REPLACE LIGHT CONTROL LED ECU RH |
| NG |
| REPLACE HEADLIGHT UNIT ASSEMBLY RH |
Taillight Relay Circuit
DESCRIPTION The main body ECU (multiplex network body ECU) controls the, taillight and license plate light. WIRING DIAGRAM
CAUTION / NOTICE / HINT NOTICE:
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...
Other information:
Toyota Yaris XP210 (2020-2025) Reapir and Service Manual: Diagnosis System
DIAGNOSIS SYSTEM EURO-OBD (EUROPEAN SPEC) When troubleshooting Europe On-Board Diagnostic (Euro-OBD) vehicles, an OBD scan tool (complying with ISO 15765-4) must be connected to the vehicle. Various data output from the vehicle's ECM can then be read...
Toyota Yaris XP210 (2020-2025) Reapir and Service Manual: Replacement
REPLACEMENT CAUTION / NOTICE / HINT The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed and installed, or replaced during the transfer case front oil seal removal/installation are shown below...
Categories
- Manuals Home
- Toyota Yaris Owners Manual
- Toyota Yaris Service Manual
- Auto Lock/Unlock Function
- How to use USB mode
- To Set Speed
- New on site
- Most important about car
Keys
To use the auxiliary key, press the knob and pull out the auxiliary key from the smart key.
