Engine Coolant Temperature Receiver Gauge Malfunction [10/2018 - 07/2022]: Procedure

1. Check if CAN communication system DTCs are output.
   1. for HV Model:

      Refer to DIAGNOSIS SYSTEM [10/2018 - 10/2019] Refer to DIAGNOSIS SYSTEM [10/2019 - 08/2021] Refer to DIAGNOSIS SYSTEM [08/2021 - 07/2022]

   2. for Gasoline Model:

      Refer to DIAGNOSIS SYSTEM [10/2018 - 10/2019] Refer to DIAGNOSIS SYSTEM [10/2019 - 07/2022]

   Result

   Result	Proceed to
   DTCs are not output	A
   DTCs are output (for HV Model)	B
   DTCs are output (for Gasoline Model)	C

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - ] 

Result: 

C 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - 07/2022] 

Result: 

A 

See step  2

1. Check if SFI system DTCs are output.

   Powertrain > Engine > Trouble Codes 

   Result

   Result	Proceed to
   DTCs are not output	A
   DTCs are output (for HV Model)	B
   DTCs are output (for Gasoline Model)	C

Result: 

B 

GO TO SFI SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2018 - 10/2019]  Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2019 - 10/2020]  Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2020 - 08/2021]  Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2021 - ] 

Result: 

C 

GO TO SFI SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2018 - 10/2019]  Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2019 - 08/2021]  Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2021 - 07/2022] 

Result: 

A 

See step  3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Combination Meter / Active Test.
5. 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.

   Result

   Result	Proceed to
   OK (for HV Model)	A
   OK (for Gasoline Model)	B
   NG	C

Result: 

A 

REPLACE ECM. Refer to  REMOVAL [10/2018 - 07/2022] 

Result: 

B 

REPLACE ECM. Refer to  REMOVAL [10/2018 - 07/2022] 

Result: 

C 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [10/2018 - 07/2022]