| Last Modified: 12-11-2024 | 6.11:8.1.0 | Doc ID: RM100000002OYC3 |
| Model Year Start: 2025 | Model: GR Corolla | Prod Date Range: [09/2024 - ] |
| Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (for 12.3 Inch Display): Headup Display Malfunction; 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2024 - ] | ||
|
Headup Display Malfunction |
DESCRIPTION
The meter mirror sub-assembly connected by the combination meter assembly via GVIF communication receives information regarding the headup display contents from the combination meter assembly and reflects the contents to the display.
CAUTION / NOTICE / HINT
NOTICE:
- 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.
-
When replacing the combination meter assembly, update the ECU security key.
Click here
![2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - ]; SETUP: WHEN REPLACING OR REMOVING/INSTALLING PARTS: UPDATE ECU SECURITY KEY](/t3Portal/stylegraphics/info.gif)
PROCEDURE
|
1. |
CHECK FOR DTC |
(a) Check for DTCs.
Body Electrical > Combination Meter > Trouble Codes
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTCs are output |
B |
| B |
|
|
|
2. |
CHECK SYMPTOMS |
(a) Check the problem symptoms.
|
Result |
Proceed to |
|---|---|
|
Display position abnormality |
A |
|
Display screen abnormality |
B |
| B |
|
|
|
3. |
PERFORM ACTIVE TEST USING GTS |
(a) Perform the Active Test according to the display on the GTS.
Body Electrical > Combination Meter > Active Test
|
Tester Display |
Measurement Item |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
HUD Display Position |
Headup display (Display position) |
Up (+3), Up (+2), Up (+1), Center, Down (-1), Down (-2) or Down (-3) |
- |
Body Electrical > Combination Meter > Active Test
|
Tester Display |
|---|
|
HUD Display Position |
|
Result |
Proceed to |
|---|---|
|
Active Test can be performed correctly |
A |
|
Active Test cannot be performed correctly |
B |
| B |
|
|
|
4. |
INSPECT METER MIRROR SUB-ASSEMBLY |
(a) Check that the meter mirror sub-assembly is correctly installed to the vehicle.
| NG |
|
INSTALL METER MIRROR SUB-ASSEMBLY |
|
|
5. |
ADJUST METER MIRROR SUB-ASSEMBLY (DISPLAY POSITION SETTING) |
(a) Adjusts headup display position using the customize setting.
Click here
|
Result |
Proceed to |
|---|---|
|
Problem symptoms disappear |
A |
|
Problem symptoms do not disappear |
B |
| A |
|
| B |
|
|
6. |
PERFORM ACTIVE TEST USING GTS |
(a) Perform the Active Test according to the display on the GTS.
Body Electrical > Combination Meter > Active Test
|
Tester Display |
Measurement Item |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Color Test Screen (Black) |
Headup display (Black color display) |
ON |
- |
|
Color Test Screen (White) |
Headup display (White color display) |
ON |
- |
|
Color Test Screen (Red) |
Headup display (Red color display) |
ON |
- |
|
Color Test Screen (Green) |
Headup display (Green color display) |
ON |
- |
|
Color Test Screen (Blue) |
Headup display (Blue color display) |
ON |
- |
|
Color Test Screen (Color Bars) |
Headup display (Color bars) |
ON |
- |
|
Liquid Crystal Display Backlight Brightness |
Headup display (display brightness) |
0 to 100% |
- |
Body Electrical > Combination Meter > Active Test
|
Tester Display |
|---|
|
Color Test Screen (Black) |
Body Electrical > Combination Meter > Active Test
|
Tester Display |
|---|
|
Color Test Screen (White) |
Body Electrical > Combination Meter > Active Test
|
Tester Display |
|---|
|
Color Test Screen (Red) |
Body Electrical > Combination Meter > Active Test
|
Tester Display |
|---|
|
Color Test Screen (Green) |
Body Electrical > Combination Meter > Active Test
|
Tester Display |
|---|
|
Color Test Screen (Blue) |
Body Electrical > Combination Meter > Active Test
|
Tester Display |
|---|
|
Color Test Screen (Color Bars) |
Body Electrical > Combination Meter > Active Test
|
Tester Display |
|---|
|
Liquid Crystal Display Backlight Brightness |
|
Result |
Proceed to |
|---|---|
|
Active Test can be performed correctly |
A |
|
Active Test cannot be performed correctly |
B |
| B |
|
|
|
7. |
INSPECT NO.1 COMBINATION METER MIRROR PLATE |
(a) Disconnect the No. 1 combination meter mirror plate from the meter mirror sub-assembly.
Click here
(b) Check that the No. 1 combination meter mirror plate is operating normally.
HINT:
If there is a malfunction such as severe deformation, damage or haze, replace the No. 1 combination meter mirror plate as it may adversely affect the display.
| NG |
|
|
|
8. |
ADJUST METER MIRROR SUB-ASSEMBLY (DISPLAY IMAGE SETTING) |
(a) Adjusts headup display image using the customize setting.
Click here
|
Result |
Proceed to |
|---|---|
|
Problem symptoms disappear |
A |
|
Problem symptoms do not disappear |
B |
| A |
|
| B |
|
|
|