Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Fuel Lid Opener System Operation Message Display Malfunction

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Vehicle Interior / Meter / Gauge / Display / Meter / Gauge System(for Hv Model) / 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

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 A19 ECM connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
A19-41 (LSTM) - Body ground	Always	11 to 14 V

GO TO STEP 3

2.	INSPECT COMBINATION METER ASSEMBLY (INPUT WAVEFORM)

*a	Component with harness connected (Combination Meter Assembly)

(a) Connect the A19 ECM connector.

(b) Remove the combination meter assembly with the connector(s) still connected.

(d) Check the signal waveform according to the condition(s) in the table below.

Waveform 1:

Item	Condition
Tester Connection	G16-34 (LST1) - Body ground
Tool setting	5 V/DIV., 20 ms./DIV.
Condition	"Ready to Refuel" displayed on multi-information display

Waveform 2:

Item	Condition
Tester Connection	G16-34 (LST1) - Body ground
Tool setting	5 V/DIV., 20 ms./DIV.
Condition	"Close Fuel Lid" displayed on multi-information display

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.

REPLACE COMBINATION METER ASSEMBLY

REPLACE ECM

3.	CHECK HARNESS AND CONNECTOR (ECM - COMBINATION METER ASSEMBLY)

(a) Disconnect the G16 combination meter assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
A19-41 (LSTM) - G16-34 (LST1)	Always	Below 1 Ω
A19-41 (LSTM) or G16-34 (LST1) - Body ground	Always	10 kΩ or higher

REPLACE COMBINATION METER ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

Entire Combination Meter does not Operate

Fuel Receiver Gauge Display Malfunction

See More:

Toyota Avalon (XX50) 2019-2022 Owners Manual > Using the driving support systems: Rear Camera Detection function (vehicles with panoramic view monitor)
When the vehicle is backing up, the rear camera detection function can detect pedestrians in the detection area behind the vehicle. If a pedestrian is detected, a buzzer will sound and an icon on the audio system screen will be displayed to inform the driver of the pedestrian. Display Pedestrian de ...