| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM1000000028HAL |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [11/2022 - ] |
| Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (except 12.3 Inch Display): Tachometer Malfunction; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 - ] | ||
|
Tachometer Malfunction |
DESCRIPTION
for HV Model
- The combination meter assembly receives engine speed signals from the hybrid vehicle control ECU via CAN communication. The combination meter assembly displays the engine speed calculated based on the data received from the hybrid vehicle control ECU.
for Gasoline Model
- The combination meter assembly receives engine speed signals from the ECM via CAN communication. The combination meter assembly displays the engine speed calculated based on the data received from the ECM.
WIRING DIAGRAM
for HV Model
for Gasoline Model
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)
for HV Model
-
When replacing the hybrid vehicle control ECU, update the ECU security key.
Click here
-
Before replacing the hybrid vehicle control ECU, refer to Registration.
Click here
for Gasoline Model
-
When replacing the ECM, update the ECU security key.
Click here
-
Before replacing the ECM, refer to Registration.
Click here
PROCEDURE
|
1. |
CONFIRM MODEL |
(a) Choose the model to be inspected.
|
Result |
Proceed to |
|---|---|
|
for HV Model |
A |
|
for Gasoline Model |
B |
| B |
|
|
|
2. |
CHECK CAN COMMUNICATION SYSTEM |
(a) Check if CAN communication DTCs are output.
Click here
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTCs are output |
B |
| B |
|
|
|
3. |
CHECK FOR DTC (HYBRID CONTROL SYSTEM) |
(a) Check if hybrid control system DTCs are output.
Powertrain > Hybrid Control > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTCs are output |
B |
| B |
|
|
|
4. |
READ VALUE USING GTS |
(a) Read the Data List according to the display on the GTS.
Body Electrical > Combination Meter > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Engine RPM |
Engine speed input |
Min.: 0 rpm, Max.: 12701 rpm or Unset |
Almost the same as actual tachometer |
The value displayed on the tachometer may deviate.* |
-
*: For the tolerance of tachometer, refer to Operation Check.
Click here
Body Electrical > Combination Meter > Data List
|
Tester Display |
|---|
|
Engine RPM |
|
Result |
Proceed to |
|---|---|
|
The value displayed in the Data List and on the tachometer approximately match |
A |
|
The value displayed in the Data List and on the tachometer do not match |
B |
| A |
|
| B |
|
|
5. |
CHECK CAN COMMUNICATION SYSTEM |
(a) Check if CAN communication DTCs are output.
Click here
|
Result |
Proceed to |
|---|---|
|
CAN communication DTCs are not output |
A |
|
CAN communication DTCs are output |
B |
| B |
|
GO TO CAN COMMUNICATION SYSTEM
|
|
|
6. |
CHECK FOR DTC (SFI SYSTEM) |
(a) Check if SFI system DTCs are output.
Powertrain > Engine > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTCs are output |
B |
| B |
|
GO TO SFI SYSTEM
|
|
|
7. |
READ VALUE USING GTS |
(a) Read the Data List according to the display on the GTS.
Body Electrical > Combination Meter > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Engine RPM |
Engine speed input |
Min.: 0 rpm, Max.: 12701 rpm or Unset |
Almost the same as actual tachometer |
The value displayed on the tachometer may deviate.* |
-
*: For the tolerance of tachometer, refer to Operation Check.
Click here
Body Electrical > Combination Meter > Data List
|
Tester Display |
|---|
|
Engine RPM |
|
Result |
Proceed to |
|---|---|
|
The value displayed in the Data List and on the tachometer approximately match |
A |
|
The value displayed in the Data List and on the tachometer do not match |
B |
| A |
|
REPLACE ECM
|
| B |
|
|
|