Engine Coolant Temperature Receiver Gauge Malfunction [08/2020 - ]: Procedure

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2024 Lexus ES 350, 2024 Lexus ES 250, 2023 Lexus ES 350, 2023 Lexus ES 250, and 2022 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.

CHECK CAN COMMUNICATION SYSTEM

Check if CAN communication system DTCs are output.

Refer to DIAGNOSIS SYSTEM [08/2020 - 08/2021] , or refer to DIAGNOSIS SYSTEM [08/2021 - 09/2022] , or refer to DIAGNOSIS SYSTEM [09/2022 - ]

Result

Result	Proceed to
DTCs are not output	A
DTCs are output	B

Result:

GO TO CAN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ]

Result:

See step 2

CHECK FOR DTC (SFI SYSTEM)

Check if SFI system DTCs are output.

Powertrain > Engine > Trouble Codes

Result

Result	Proceed to
DTCs are not output	A
DTCs are output	B

Result:

GO TO SFI SYSTEM

for 2GR-FKS: Refer to DIAGNOSTIC TROUBLE CODE CHART [08/2020 - 08/2021] , or refer to DIAGNOSTIC TROUBLE CODE CHART [08/2021 - ]

for A25A-FKS: Refer to DIAGNOSTIC TROUBLE CODE CHART [08/2020 - 08/2021] , or refer to DIAGNOSTIC TROUBLE CODE CHART [08/2021 - 09/2022] , or refer to DIAGNOSTIC TROUBLE CODE CHART [09/2022 - ]

Result:

See step 3

CONFIRM MODEL

Choose the model to be inspected.

Result

Result	Proceed to
for F SPORT Models	A
except F SPORT Models	B

Result:

See step 5

Result:

See step 4

READ VALUE USING TECHSTREAM

Connect the Techstream to the DLC3.
Turn the engine switch on (IG).
Turn the Techstream on.
Enter the following menus: Body Electrical / Combination Meter / Data List.

Read the Data List according to the display on the Techstream.

Body Electrical > Combination Meter > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Coolant Temperature	Engine coolant temperature	Min.: 0.0°C, Max.: 127.1°C or Unset	75 to 100°C: After warming up engine	-

Body Electrical > Combination Meter > Data List

Tester Display
Coolant Temperature

Engine coolant temperature receiver gauge indication is normal.

Result

Proceed to
OK
NG

Result:

REPLACE ECM

for 2GR-FKS: Refer to REMOVAL [10/2019 - 08/2021] , or refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]

for A25A-FKS: Refer to REMOVAL [08/2020 - 08/2021] , or refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]

Result:

REPLACE COMBINATION METER ASSEMBLY. Refer to REMOVAL [06/2018 - 08/2021] , or refer to REMOVAL [08/2021 - ]

PERFORM ACTIVE TEST USING TECHSTREAM

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*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)

Connect the Techstream to the DLC3.
Turn the engine switch on (IG).
Turn the Techstream on.
Enter the following menus: Body Electrical / Combination Meter / Active Test.

Perform the Active Test according to the display on the Techstream.