METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (except 12.3 Inch Display): Engine Coolant Temperature Receiver Gauge Malfunction; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022

Last Modified: 07-31-2024	6.11:8.1.0	Doc ID: RM1000000028HAN
Model Year Start: 2023	Model: GR Corolla	Prod Date Range: [11/2022 - ]
Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (except 12.3 Inch Display): Engine Coolant Temperature Receiver Gauge Malfunction; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 - ]

Engine Coolant Temperature Receiver Gauge Malfunction

DESCRIPTION

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.
When replacing any of the following ECUs, update the ECU security key.
Click here
- Combination meter assembly
- ECM
Before replacing the ECM, refer to Registration.*
Click here
- *: for Gasoline Model

PROCEDURE

1.	CHECK CAN COMMUNICATION SYSTEM

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

for Gasoline Model: Click here

for HV Model: Click here

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

GO TO CAN COMMUNICATION SYSTEM

for Gasoline Model: Click here

for HV Model: Click here

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

GO TO SFI SYSTEM

for HV Model: Click here

for Gasoline Model: Click here

3.	READ VALUE USING GTS (COOLANT TEMPERATURE)

(a) Using the GTS, read the Data List.

Body Electrical > Combination Meter > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Coolant Temperature	Engine coolant temperature	Min.: 0°C (0°F), Max.: 127.0°C (260.6°F)	75 to 100°C (167 to 212°F): After warming up the engine	-

Body Electrical > Combination Meter > Data List

Tester Display
Coolant Temperature

for M20A-FKS:

Powertrain > Engine > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Coolant Temperature	Engine coolant temperature	Min.: -40°C (-40°F), Max.: 140°C (284°F)	75 to 100°C (167 to 212°F): After warming up	This is the engine coolant temperature. HINT: After warming up the engine, the engine coolant temperature will be 75 to 100°C (167 to 212°F). After a long soak, the engine coolant temperature, intake air temperature and ambient air temperature will be approximately equal. If the value is -40°C (-40°F), or higher than 135°C (275°F), the sensor circuit is open or shorted. Check if the engine overheats if the value indicated is higher than 135°C (275°F).

Powertrain > Engine > Data List

Tester Display
Coolant Temperature

for 2ZR-FXE:

Powertrain > Engine > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Coolant Temperature	Engine coolant temperature	Min.: -40°C (-40°F), Max.: 140°C (284°F)	75 to 100°C (167 to 212°F): After warming up	This is the engine coolant temperature. HINT: After warming up the engine, the engine coolant temperature will be 75 to 100°C (167 to 212°F). After a long soak, the engine coolant temperature, intake air temperature, ambient air temperature and radiator coolant temperature will be approximately equal. If the value is -40°C (-40°F), or higher than 135°C (275°F), the sensor circuit is open or shorted. Check if the engine overheats if the value indicated is higher than 135°C (275°F).

Powertrain > Engine > Data List

Tester Display
Coolant Temperature

GO TO SFI SYSTEM

for HV Model: Click here

for Gasoline Model: Click here

REPLACE COMBINATION METER ASSEMBLY