PRECAUTION INITIALIZATION NOTICE:
Before replacing the ECM, refer to Service Bulletin (for Immobiliser System).
When the ECM is replaced, update the ECU security key...
Other information:
MONITOR DESCRIPTION The ECM uses air fuel ratio sensors mounted in front of and behind the Three-Way Catalytic Converter (TWC) to monitor its efficiency. The first sensor, the air fuel ratio sensor (sensor 1), sends pre-catalyst information to the ECM...
INSPECTION PROCEDURE 1. INSPECT MASS AIR FLOW METER (a) Perform a visual check for any foreign matter on the temperature sensor (thermistor) of the mass air flow meter shown in the illustration. OK: There is no foreign matter. If the result is not as specified, replace the mass air flow meter...