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

1. Check if CAN communication system DTCs are output.

   For HV Model: Refer to DIAGNOSIS SYSTEM [10/2022 - 11/2023] , or refer to DIAGNOSIS SYSTEM [11/2023 - ]

   For Gasoline Model: Refer to DIAGNOSIS SYSTEM [10/2022 - 11/2023] , or refer to DIAGNOSIS SYSTEM [11/2023 - ]

   Result

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

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM 

For HV Model: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 11/2023] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ]

For Gasoline Model: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 11/2023] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ]

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	B

Result: 

B 

GO TO SFI SYSTEM 

For HV Model: Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2022 - 11/2023] , or refer to DIAGNOSTIC TROUBLE CODE CHART [11/2023 - 11/2024] , or refer to DIAGNOSTIC TROUBLE CODE CHART [11/2024 - ]

For Gasoline Model: Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2022 - 11/2023] , or refer to DIAGNOSTIC TROUBLE CODE CHART [11/2023 - ]

Result: 

A 

See step  3

1. Perform the Active Test according to the display on the GTS.

   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	See [Display 1]
   Water Temperature Meter Operation (60C, 140F)	Engine coolant temperature receiver gauge (60°C, 140°F)	ON	See [Display 1]
   Water Temperature Meter Operation (70C, 158F)	Engine coolant temperature receiver gauge (70°C, 158°F)	ON	See [Display 1]
   Water Temperature Meter Operation (80C, 176F)	Engine coolant temperature receiver gauge (80°C, 176°F)	ON	See [Display 1]
   Water Temperature Meter Operation (Middle)	Engine coolant temperature receiver gauge (Middle)	ON	See [Display 1]
   Water Temperature Meter Operation (110C, 230F)	Engine coolant temperature receiver gauge (110°C, 230°F)	ON	See [Display 1]
   Water Temperature Meter Operation (120C, 248F)	Engine coolant temperature receiver gauge (120°C, 248°F)	ON	See [Display 1]
   Water Temperature Meter Operation (127C, 260F)	Engine coolant temperature receiver gauge (127°C, 260°F)	ON	See [Display 1]

   [Display 1]: Water Temperature Meter Operation 

   1. Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      *a	Engine Coolant Temperature Receiver Gauge

      HINT: 

      Refer to the following table for the specified engine coolant temperature receiver gauge position for each selected value:

      Tester Display	Engine Coolant Temperature Receiver Gauge Indication
      Water Temperature Meter Operation (50C, 122F)	Between 2 and 3 is indicated*1
      	Between 1 and 2 is indicated*2
      Water Temperature Meter Operation (60C, 140F)	Between 3 and 4 is indicated*1
      	Between 2 and 3 is indicated*2
      Water Temperature Meter Operation (70C, 158F)	Between 3 and 4 is indicated
      Water Temperature Meter Operation (80C, 176F)	Between 3 and 4 is indicated
      Water Temperature Meter Operation (Middle)	Between 3 and 4 is indicated
      Water Temperature Meter Operation (110C, 230F)	Between 4 and 5 is indicated
      Water Temperature Meter Operation (120C, 248F)	Approximately 6 is indicated
      Water Temperature Meter Operation (127C, 260F)	Approximately 7 is indicated

      1. *1: for HV Model
      2. *2: for Gasoline Model

   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

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ECM 

For HV Model: Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

For Gasoline Model: Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

Result: 

NG 

REPLACE COMBINATION METER ASSEMBLY 

Refer to REMOVAL [12/2019 - ]