Check For Intermittent Problems
WARNING: This page is about a different car, the 2007 Lexus SC 430. 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 (see ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
- Check and wiggle the harness (es), connector (s) and terminal (s) (see ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).