Tachometer Malfunction [04/2018 - 08/2020]: Procedure
WARNING: This page is about a different car, the 2022 Toyota Avalon, 2021 Toyota Avalon, 2020 Toyota Avalon, and 2019 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK CAN COMMUNICATION SYSTEM
- Check if CAN communication DTCs are output.
Refer to DIAGNOSIS SYSTEM [04/2018 - 08/2020]
Result
Result Proceed to CAN communication DTCs are not output A CAN communication DTCs are output B
Result:
B
GO TO CAN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [04/2018 - ]
Result:
A
See step 2
- Check if CAN communication DTCs are output.
- CHECK FOR DTC (HYBRID CONTROL SYSTEM)
- Check if hybrid control system DTCs are output.
Powertrain > Hybrid Control > Trouble Codes
Result
Result Proceed to DTCs are not output A DTCs are output B
Result:
B
GO TO HYBRID CONTROL SYSTEM. Refer to DIAGNOSTIC TROUBLE CODE CHART [04/2018 - 08/2020]
Result:
A
See step 3
- Check if hybrid control system DTCs are output.
- READ VALUE USING TECHSTREAM
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Turn the Techstream on.
- Enter the following menus: Powertrain / Hybrid Control / Data List.
- Read the Data List according to the display on the Techstream.
Powertrain > Hybrid Control > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note Engine Speed Engine speed - Engine stopped:
0 rpm
While engine running at a constant speed:
No significant fluctuation- Powertrain > Hybrid Control > Data List
Tester Display Engine Speed OK
Engine speed displayed on the Techstream is almost the same as the tachometer indication.
Result
Proceed to OK NG
Result:
OK
USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [04/2018 - ]
Result:
NG
REPLACE COMBINATION METER ASSEMBLY. Refer to REMOVAL [04/2018 - 08/2020]