Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001AHZC
Model Year Start: 2019 Model: Avalon HV Prod Date Range: [04/2018 -           ]
Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (for HV Model): Engine Coolant Temperature Receiver Gauge Malfunction; 2019 - 2022 MY Avalon HV [04/2018 -        ]

Engine Coolant Temperature Receiver Gauge Malfunction

DESCRIPTION

In this circuit, the combination meter assembly receives engine coolant temperature signals from the ECM via CAN communication. The combination meter assembly displays an engine coolant temperature warning based on the data 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.
  • Before replacing the ECM, refer to Registration.

    Click here 2019 - 2020 MY Avalon HV [04/2018 - 08/2020]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION 2021 - 2022 MY Avalon HV [08/2020 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION

HINT:

If there is an open or short in the engine coolant temperature sensor circuit, the ECM stores DTCs. Troubleshoot the SFI system.

Click here 2019 - 2022 MY Avalon HV [04/2018 -        ]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Check if CAN communication system DTCs are output.

Click here 2019 - 2020 MY Avalon HV [04/2018 - 08/2020]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM 2021 MY Avalon HV [08/2020 - 08/2021]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM 2022 MY Avalon HV [08/2021 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM

Result

Proceed to

DTCs are not output

A

DTCs are output

B
B

GO TO CAN COMMUNICATION SYSTEM

A

2.

CHECK FOR DTC (SFI SYSTEM)

(a) Check if SFI system DTCs are output.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTCs are output

B
B

GO TO SFI SYSTEM 2019 MY Avalon HV [04/2018 - 08/2019]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: DIAGNOSTIC TROUBLE CODE CHART 2020 MY Avalon HV [08/2019 - 08/2020]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: DIAGNOSTIC TROUBLE CODE CHART 2021 MY Avalon HV [08/2020 - 08/2021]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: DIAGNOSTIC TROUBLE CODE CHART 2022 MY Avalon HV [08/2021 -        ]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: DIAGNOSTIC TROUBLE CODE CHART

A

3.

PERFORM ACTIVE TEST USING TECHSTREAM

*a

Water Temperature Meter Operation (50C,122F)

*b

Water Temperature Meter Operation (60C,140F)

*c

Water Temperature Meter Operation (70C,158F)

*d

Water Temperature Meter Operation (80C,176F)

*e

Water Temperature Meter Operation (Middle)

*f

Water Temperature Meter Operation (110C,230F)

*g

Water Temperature Meter Operation (120C,248F)

*h

Water Temperature Meter Operation (127C,260F)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Combination Meter / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Combination Meter > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Water Temperature Meter Operation (50C,122F)

Engine coolant temperature receiver gauge (50°C, 122°F)

ON

-

Water Temperature Meter Operation (60C,140F)

Engine coolant temperature receiver gauge (60°C, 140°F)

ON

-

Water Temperature Meter Operation (70C,158F)

Engine coolant temperature receiver gauge (70°C, 158°F)

ON

-

Water Temperature Meter Operation (80C,176F)

Engine coolant temperature receiver gauge (80°C, 176°F)

ON

-

Water Temperature Meter Operation (Middle)

Engine coolant temperature receiver gauge (Middle)

ON

-

Water Temperature Meter Operation (110C,230F)

Engine coolant temperature receiver gauge (110°C, 230°F)

ON

-

Water Temperature Meter Operation (120C,248F)

Engine coolant temperature receiver gauge (120°C, 248°F)

ON

-

Water Temperature Meter Operation (127C,260F)

Engine coolant temperature receiver gauge (127°C, 260°F)

ON

-

Body Electrical > Combination Meter > Active Test

Tester Display

Water Temperature Meter Operation (50C,122F)

Body Electrical > Combination Meter > Active Test

Tester Display

Water Temperature Meter Operation (60C,140F)

Body Electrical > Combination Meter > Active Test

Tester Display

Water Temperature Meter Operation (70C,158F)

Body Electrical > Combination Meter > Active Test

Tester Display

Water Temperature Meter Operation (80C,176F)

Body Electrical > Combination Meter > Active Test

Tester Display

Water Temperature Meter Operation (Middle)

Body Electrical > Combination Meter > Active Test

Tester Display

Water Temperature Meter Operation (110C,230F)

Body Electrical > Combination Meter > Active Test

Tester Display

Water Temperature Meter Operation (120C,248F)

Body Electrical > Combination Meter > Active Test

Tester Display

Water Temperature Meter Operation (127C,260F)

OK:

Engine coolant temperature receiver gauge operation is normal.

OK

REPLACE ECM 2019 - 2020 MY Avalon HV [04/2018 - 08/2020]; A25A-FXS (ENGINE CONTROL): ECM: REMOVAL 2021 MY Avalon HV [08/2020 - 08/2021]; A25A-FXS (ENGINE CONTROL): ECM: REMOVAL 2022 MY Avalon HV [08/2021 -        ]; A25A-FXS (ENGINE CONTROL): ECM: REMOVAL

NG

REPLACE COMBINATION METER ASSEMBLY 2019 - 2020 MY Avalon Avalon HV [04/2018 - 08/2020]; METER / GAUGE / DISPLAY: COMBINATION METER: REMOVAL 2021 MY Avalon Avalon HV [08/2020 - 08/2021]; METER / GAUGE / DISPLAY: COMBINATION METER: REMOVAL 2022 MY Avalon Avalon HV [08/2021 -        ]; METER / GAUGE / DISPLAY: COMBINATION METER: REMOVAL