Fuel Lid Opener System Operation Message Display Malfunction [10/2023 - ]: Procedure

1. Disconnect the A56 ECM connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A56-59 (LSTM) - Body ground	Ignition switch off	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  5

Result: 

OK 

See step  2

1. Check vehicle condition.

   Result

   Result	Proceed to
   w/ Front LiDAR Sensor	A
   w/o Front LiDAR Sensor	B

Result: 

B 

See step  4

Result: 

A 

See step  3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Connect the ECM connector.
2. Operate the fuel lid opener switch.
3. Check the signal waveform according to the condition(s) in the table below.
   NOTE:

   Perform the inspection from the back of the connector with the connector connected.

   1. Waveform 1:

      Item	Condition
      Tester connection	G162-28 (LST1) - Body ground
      Tool setting	5 V/DIV., 20 ms./DIV.
      Vehicle condition	"Ready to Refuel" displayed on multi-information display

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   2. Waveform 2:

      Item	Condition
      Tester connection	G162-28 (LST1) - Body ground
      Tool setting	5 V/DIV., 20 ms./DIV.
      Vehicle condition	"Close Fuel Lid" displayed on multi-information display

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      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.
   3. Waveform 3:

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Item	Condition
      Tester connection	G162-28 (LST1) - Body ground
      Tool setting	5 V/DIV., 20 ms./DIV.
      Vehicle condition	"Please Wait Fuel Door Opening" displayed on 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.

   Result

   Result	Proceed to
   All of the waveforms are output normally	A
   A waveform is not output normally	B

Result: 

A 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [10/2023 - ] 

Result: 

B 

REPLACE ECM. Refer to  REMOVAL [10/2023 - ] 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Connect the ECM connector.
2. Operate the fuel lid opener switch.
3. Check the signal waveform according to the condition(s) in the table below.
   NOTE:

   Perform the inspection from the back of the connector with the connector connected.

   1. Waveform 1:

      Item	Condition
      Tester connection	G209-28 (LST1) - Body ground
      Tool setting	5 V/DIV., 20 ms./DIV.
      Vehicle condition	"Ready to Refuel" displayed on multi-information display

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   2. Waveform 2:

      Item	Condition
      Tester connection	G209-28 (LST1) - Body ground
      Tool setting	5 V/DIV., 20 ms./DIV.
      Vehicle condition	"Close Fuel Lid" displayed on multi-information display

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      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.
   3. Waveform 3:

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Item	Condition
      Tester connection	G209-28 (LST1) - Body ground
      Tool setting	5 V/DIV., 20 ms./DIV.
      Vehicle condition	"Please Wait Fuel Door Opening" displayed on 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.

   Result

   Result	Proceed to
   All of the waveforms are output normally	A
   A waveform is not output normally	B

Result: 

A 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [10/2023 - ] 

Result: 

B 

REPLACE ECM. Refer to  REMOVAL [10/2023 - ] 

1. *1: w/ Front LiDAR Sensor
2. *2: w/o Front LiDAR Sensor

1. Disconnect the A56 ECM connector.
2. Disconnect the G162*1 or G209*2 combination meter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   W/ FRONT LIDAR SENSOR
   
   

   Tester Connection	Condition	Specified Condition
   A56-59 (LSTM) - G162-28 (LST1)	Always	Below 1 Ω
   A56-59 (LSTM) or G162-28 (LST1) - Body ground	Always	10 kΩ or higher

   W/O FRONT LIDAR SENSOR
   
   

   Tester Connection	Condition	Specified Condition
   A56-59 (LSTM) - G209-28 (LST1)	Always	Below 1 Ω
   A56-59 (LSTM) or G209-28 (LST1) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [10/2023 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR