Toyota Yaris: Meter / Gauge System / 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.
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PROCEDURE
| 1. | CHECK CAN COMMUNICATION SYSTEM |
(a) Check if CAN communication system DTCs are output.
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| Result | Proceed to |
|---|---|
| DTCs are not output | A |
| DTCs are output | B |
| B |
 | GO TO CAN COMMUNICATION SYSTEM |
|
| 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 |
|
| 3. | PERFORM ACTIVE TEST USING GTS |
(a) 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
*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 1 and 2 is indicated
Water Temperature Meter Operation
(60C, 140F)
Between 1 and 2 is indicated
Water Temperature Meter Operation
(70C, 158F)
Between 2 is indicated
Water Temperature Meter Operation
(80C, 176F)
Between 2 and 3 is indicated
Water Temperature Meter Operation
(Middle)
Between 2 and 3 is indicated
Water Temperature Meter Operation
(110C, 230F)
Between 3 is indicated
Water Temperature Meter Operation
(120C, 248F)
Approximately 4 is indicated
Water Temperature Meter Operation
(127C, 260F)
Approximately 5 is indicated
| Tester Display |
|---|
| Water Temperature Meter Operation (50C,122F) |
| Tester Display |
|---|
| Water Temperature Meter Operation (60C,140F) |
| Tester Display |
|---|
| Water Temperature Meter Operation (70C,158F) |
| Tester Display |
|---|
| Water Temperature Meter Operation (80C,176F) |
| Tester Display |
|---|
| Water Temperature Meter Operation (Middle) |
| Tester Display |
|---|
| Water Temperature Meter Operation (110C,230F) |
| Tester Display |
|---|
| Water Temperature Meter Operation (120C,248F) |
| Tester Display |
|---|
| Water Temperature Meter Operation (127C,260F) |
OK:
Engine coolant temperature receiver gauge indication is normal.
| OK |
 | REPLACE ECM |
| NG |
 | REPLACE COMBINATION METER ASSEMBLY |
Fuel Receiver Gauge Malfunction
DESCRIPTION FUEL RECEIVER GAUGE OPERATION (a) OPERATION The combination meter assembly uses the fuel sender gauge assembly to detect the amount of fuel remaining in the fuel tank assembly...
Meter Illumination is Always Dark
DESCRIPTION The combination meter assembly receives signals from this circuit to adjust the illumination of the combination meter assembly. The combination meter assembly sets the illumination level based on the user operation of the light control rheostat...
Other information:
Toyota Yaris XP210 (2020-2024) Reapir and Service Manual: Diagnostic Trouble Code Chart
D..
Toyota Yaris XP210 (2020-2024) Reapir and Service Manual: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE NOTICE: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table...
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