Check For Intermittent Problems

WARNING: This page is about a different car, the 2007 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Inspect the vehicle's ECM using check mode. Intermittent problems are easier to detect with the intelligent tester 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 (See DTC CHECK/CLEAR ).
Switch the ECM from normal mode to check mode using the intelligent tester (See CHECK MODE PROCEDURE ).
Perform a simulation test.
Check and wiggle the harness (es), connector (s) and terminal (s).