- "Ready to Refuel"
| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM1000000026EY1 |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [09/2022 - ] |
| Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (except 12.3 Inch Display): Fuel Lid Opener System Operation Message Display Malfunction; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - ] | ||
|
Fuel Lid Opener System Operation Message Display Malfunction |
DESCRIPTION
The combination meter assembly and ECM are connected via direct line. The combination meter assembly displays fuel lid opener system operation messages according to the fuel lid signals received from the ECM.
WIRING DIAGRAM
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 of the following ECUs, 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)
- Combination meter assembly
- ECM
-
The following troubleshooting procedure is based on the assumption that the SFI system and fuel lid opener system are normal. Confirm that the SFI system and fuel lid opener system are not malfunctioning before performing the following procedure.
SFI system: Click here
Fuel lid opener system: Click here
PROCEDURE
|
1. |
INSPECT COMBINATION METER ASSEMBLY (OUTPUT VOLTAGE) |
|
*a |
Front view of wire harness connector (to ECM) |
(a) Disconnect the A46 ECM connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A46-30 (LSTM) - Body ground |
Ignition switch off |
11 to 14 V |
| NG |
|
|
|
2. |
INSPECT COMBINATION METER ASSEMBLY (INPUT WAVEFORM) |
|
*a |
Component with harness connected (Combination Meter Assembly) |
(a) Connect the ECM connector.
(b) Operate the fuel lid opener switch.
(c) Check the signal waveform according to the condition(s) in the table below.
NOTICE:
Perform the inspection from the back of the connector with the connector connected.
-
Waveform 1:
Item
Condition
Tester Connection
I4-28 (LST1) - Body ground
Tool setting
5 V/DIV., 20 ms./DIV.
Condition
The following message (interrupt display) being displayed on the multi-information display:
-
Waveform 2:
Item
Condition
Tester Connection
I4-28 (LST1) - Body ground
Tool setting
5 V/DIV., 20 ms./DIV.
Condition
The following message (interrupt display) being displayed on the multi-information display:
- "Close Fuel Lid"
HINT:
This waveform is output when the fuel lid opener switch is operated if the fuel lid is open and any of the following conditions are met:
- The vehicle has been driven for 1 km (0.6 mile) or more at a speed of 50 km/h (31 mph) or more.
- 30 minutes or more have elapsed since the fuel lid opener switch was operated.
|
Result |
Proceed to |
|---|---|
|
All of the waveforms are output normally |
A |
|
A waveform is not output normally |
B |
| A |
|
REPLACE COMBINATION METER ASSEMBLY
|
| B |
|
REPLACE ECM
|
|
3. |
CHECK HARNESS AND CONNECTOR (ECM - COMBINATION METER ASSEMBLY) |
(a) Disconnect the I4 combination meter assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A46-30 (LSTM) - I4-28 (LST1) |
Always |
Below 1 Ω |
|
A46-30 (LSTM) or I4-28 (LST1) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
REPLACE COMBINATION METER ASSEMBLY
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|