Caution / Notice / Hint

WARNING: This page is about a different car, the 2019 Toyota Highlander, 2018 Toyota Highlander, and 2017 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Before replacing the engine stop and start ECU, read the number of starter operations and write it into a new engine stop and start ECU.
Refer to REGISTRATION [11/2016 - ]
After replacing the engine stop and start ECU or air conditioning amplifier assembly, reset and perform learning of the air conditioning information in the engine stop and start ECU.
Refer to REGISTRATION [11/2016 - ]
After replacing the engine stop and start ECU or airbag sensor assembly, clear and calibrate the deceleration sensor zero point in the engine stop and start ECU.
Refer to REGISTRATION [11/2016 - ]
When the engine stop and start ECU or oil pump with solenoid assembly is replaced, check the oil pump with solenoid assembly.
Refer to REGISTRATION [11/2016 - ]
When the ECM is replaced on a vehicle with a non-specified battery, it is necessary to perform battery type switching.
Refer to REGISTRATION [11/2016 - ]
Before replacing the ECM, refer to Registration.
- w/ Smart Key System:
  Refer to REGISTRATION [11/2016 - ]
- w/o Smart Key System:
  Refer to REGISTRATION [11/2016 - ]
Perform Registration (VIN registration) after replacing the ECM.
Refer to PROCEDURE - Step 1
Make sure to perform Reset Memory (A/T initialization), when replacing the automatic transaxle assembly, ECM or engine assembly.
- for 2WD Models:
  Refer to REGISTRATION [11/2016 - ]
- for AWD Models:
  Refer to REGISTRATION [11/2016 - ]
Inspect the fuses for circuits related to this system before performing the following procedure.

HINT:

Using the Techstream, read the freeze frame data before troubleshooting. System condition information is recorded as freeze frame data the moment a DTC is stored. This information can be useful when troubleshooting.
Refer to FREEZE FRAME DATA [11/2016 - ]
DTCs for the stop and start system are not cleared even if the malfunction has been repaired. After repairing the malfunction, be sure to clear the DTCs.
Refer to DTC CHECK / CLEAR [11/2016 - ]