Check For Intermittent Problems

3MZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: CHECK FOR INTERMITTENT PROBLEMS

CHECK FOR INTERMITTENT PROBLEMS
HINT: Inspect the vehicle's ECM (Included in HV control ECU) using check mode. Intermittent problems are easier to detect with 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.

1 Clear the DTCs DTC Check / Clear.
2 Switch the ECM from normal mode to check mode using Techstream Check Mode Procedure.
3 Perform a simulation test Electronic Circuit Inspection Procedure.
4 Check and wiggle the harness(es), connector(s) and terminal(s).