Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: 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

(a) Disconnect the A19 ECM connector.

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

Standard Voltage:

NG

GO TO STEP 3

OK

(a) Connect the A19 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	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.

OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPLACE ECM

(a) Disconnect the G16 combination meter assembly connector.

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

Standard Resistance:

OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR