Check For Intermittent Problems

TOYOTA HAND-HELD TESTER only.
By putting the vehicle's ECM in check mode, 1 trip detection logic is possible instead of 2 trip detection logic and sensitivity to detect open circuits is increased This makes it easier to detect intermittent problems.

Clear diagnostic trouble codes
Set check mode
Perform a simulation test
Connector connection and terminal inspection
Visual check and contact pressure
Connector handling