Possible Causes
Faulty Air Injection Control Driver (AID)
Air Injection Control Driver harness is open or shorted
Air Injection Control Driver circuit poor electrical connection
Faulty Engine Control Module (ECM)
الأسباب المحتملة
Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
الأعراض المحتملة
Description
For a short time after the cold engine starts, the Engine Control Module (ECM) transmits command signals to the Air Injection Control Driver (AID) to drive the air pump and the Air Switching Valve (ASV). The AID detects open and short circuits according to the voltages at the AID terminals to the air pump and ASV, and the circuit voltage of the AID power source, and transmits diagnostic information as a signal to the ECM. If the Secondary Air Injection (AIR) system circuit or the AID itself malfunctions, the AID sends a malfunction signal (duty signal) as diagnostic information to the ECM (when the system is normal, a system normal signal is sent). The ECM sets the Diagnostic Trouble Code (DTC) based on the diagnostic information from the AID.
