Turn the ignition switch to OFF.
Repair the battery short circuit in harness between ECM and front oxygen (A/F) sensor connector.
Turn the ignition switch to ON.
Read the data of front oxygen (A/F) sensor heater current using Vehicle Diagnostic Interface or the OBD-II general scan tool.
Note. Vehicle Diagnostic Interface For detailed operation procedure, refer to the " READ CURRENT DATA FOR ENGINE ". OBD-II general scan tool For detailed operation procedure, refer to the OBD-II General Scan Tool Instruction Manual.
Is the current more than 2.3 A?
YES
Replace the ECM.
NO
END