Check for Intermittent Problems

2AZ-FXE ENGINE CONTROL SYSTEM: SFI SYSTEM: CHECK FOR INTERMITTENT PROBLEMS

CHECK FOR INTERMITTENT PROBLEMS

HINT: Inspect the vehicle's ECM using check mode. Intermittent problems are easier to detect with an 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.

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