Malfunction in Water Temperature Warning Light [06/2015 - ]: Procedure
- CHECK FOR DTC (CAN COMMUNICATION SYSTEM)
- Check for DTCs.
Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2015 - 11/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ]
OK
No DTCs are output.
Result
Proceed to OK NG
Result:
NG
GO TO CAN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2015 - 11/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ]
Result:
OK
See step 2
- Check for DTCs.
- CHECK FOR DTC (FC SYSTEM)
- Check for DTCs.
Refer to DTC CHECK / CLEAR [06/2015 - ]
Powertrain > FC > Trouble Codes
OK
No DTCs are output.
Result
Proceed to OK NG
Result:
NG
GO TO FC CONTROL SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2015 - ]
Result:
OK
See step 3
- Check for DTCs.
- PERFORM ACTIVE TEST USING TECHSTREAM (INDICAT. LAMP COOLANT HOT)
- Using the Techstream, perform the Active Test.
Refer to DATA LIST / ACTIVE TEST [06/2015 - 01/2018] , or refer to DATA LIST / ACTIVE TEST [01/2018 - 11/2018] , or refer to DATA LIST / ACTIVE TEST [11/2018 - ]
Body Electrical > Combination Meter > Active Test
Tester Display Measurement Item Control Range Diagnostic Note Indicat. Lamp Coolant Hot Water temperature hot warning light OFF or ON - Body Electrical > Combination Meter > Active Test
Tester Display Indicat. Lamp Coolant Hot OK
Value selected during Active Test is displayed.
Result
Proceed to OK NG
Result:
NG
REPLACE COMBINATION METER ASSEMBLY. Refer to REMOVAL [06/2015 - 11/2018] , or refer to REMOVAL [11/2018 - ]
Result:
OK
See step 4
- Using the Techstream, perform the Active Test.
- READ VALUE USING TECHSTREAM (FC STACK COOLANT TEMPERATURE (FC OUTLET), FC COOLANT TEMPERATURE)
- Using the Techstream, read the Data List.
Refer to DATA LIST / ACTIVE TEST [06/2015 - 01/2018] , or refer to DATA LIST / ACTIVE TEST [01/2018 - 11/2018] , or refer to DATA LIST / ACTIVE TEST [11/2018 - ]
Powertrain > FC > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note FC Stack Coolant Temperature (Radiator Outlet) FC coolant temperature Min.: -40°C (-40°F), Max: 215°C (419°F) 50 to 85°C (122 to 185°F): After warming up the engine - Body Electrical > Combination Meter > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note FC Coolant Temperature FC Stack coolant temperature Min.: 0°C (0°F), Max.: 127.5°C (261.5°F) 50 to 85°C (122 to 185°F): After warming up the engine - Powertrain > FC > Data List
Tester Display FC Stack Coolant Temperature (Radiator Outlet) Body Electrical > Combination Meter > Data List
Tester Display FC Coolant Temperature HINT:
- When the Data List values of the ECUs match, an internal malfunction of the FC control ECU is suspected.
- When the Data List values of the ECUs do not match, a signal output error of the FC control ECU or an internal malfunction of the combination meter assembly is suspected.
OK
The Data List values of the ECUs do not match.
Result
Proceed to OK NG
Result:
NG
REPLACE FC CONTROL ECU. Refer to REMOVAL [06/2015 - 11/2018] , or refer to REMOVAL [11/2018 - ]
Result:
OK
See step 5
- Using the Techstream, read the Data List.
- CHECK COMBINATION METER ASSEMBLY
- Replace the combination meter assembly.
Refer to REMOVAL [06/2015 - 11/2018] , or refer to REMOVAL [11/2018 - ]
- Check that the operation of the water temperature warning returns to normal.
OK
The operation of the water temperature warning returns to normal.
Result
Proceed to OK NG
Result:
OK
END (COMBINATION METER ASSEMBLY IS DEFECTIVE)
Result:
NG
REPLACE FC CONTROL ECU. Refer to REMOVAL [06/2015 - 11/2018] , or refer to REMOVAL [11/2018 - ]
- Replace the combination meter assembly.