Check For Intermittent Problems [11/2016 - ]

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.

HINT:

Inspect the vehicle ECM using check mode. Intermittent problems are easier to detect with the Techstream when the ECM is in check mode. In check mode, the ECM uses 1 trip detection logic, which is more sensitive to malfunctions than normal mode (default), which uses 2 trip detection logic.

Clear the DTCs.
Refer to DTC CHECK / CLEAR [11/2016 - ]
Switch the ECM from normal mode to check mode using the Techstream.
Refer to CHECK MODE PROCEDURE [11/2016 - ]
Perform a simulation test.
Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2016 - ]
Check and wiggle the harness(es), connector(s) and terminal(s).
Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [12/2013 - ]