- Please Wait Fuel Door Opening
| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001GK9E |
| Model Year Start: 2020 | Model: Corolla | Prod Date Range: [01/2019 - 09/2022] |
| Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (for HV Model): Fuel Lid Opener System Operation Message Display Malfunction; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 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.
-
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
![2020 - 2025 MY Corolla Corolla HV [01/2019 - ]; 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING](/t3Portal/stylegraphics/info.gif)
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 |
|---|---|---|
|
A46-24 (LSTM) - Body ground |
Power 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) Remove the combination meter assembly with the connector(s) still connected.
(c) Operate the fuel lid opener switch.
(d) Check the signal waveform according to the condition(s) in the table below.
-
Waveform 1:
Item
Condition
Tester Connection
I5-33 (LST1) - Body ground
Tool setting
5 V/DIV., 20 ms./DIV.
Condition
The following message (interrupt display) being displayed on the multi-information display:
HINT:
This waveform is output when the internal pressure of the fuel tank is higher than the ambient pressure when the fuel lid opener switch is operated.
-
Waveform 2:
Item
Condition
Tester Connection
I5-33 (LST1) - Body ground
Tool setting
5 V/DIV., 20 ms./DIV.
Condition
The following message (interrupt display) being displayed on the multi-information display:
- Ready to Refuel
-
Waveform 3:
Item
Condition
Tester Connection
I5-33 (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.
OK:
All of the waveforms are output normally.
| OK |
|
REPLACE COMBINATION METER ASSEMBLY
|
| NG |
|
REPLACE ECM
|
|
3. |
CHECK HARNESS AND CONNECTOR (ECM - COMBINATION METER ASSEMBLY) |
(a) Disconnect the I5 combination meter assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A46-24 (LSTM) - I5-33 (LST1) |
Always |
Below 1 Ω |
|
A46-24 (LSTM) or I5-33 (LST1) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
REPLACE COMBINATION METER ASSEMBLY
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|