Monitor Description

Air Injection Control Driver (AID) detects an open or short in the air pump and Air Switching Valve (ASV) circuit according to the terminal voltage and sends a signal as diagnostic information to the ECM.

When the air injection system operation is required while the engine is warming up, the ECM transmits command signals to the AID to drive the air pump and ASV.

The AID outputs the air pump malfunction signal to the ECM if: 1) VP terminal voltage is low despite the AID receiving the command signal from the ECM to drive the air pump or 2) VP terminal voltage is high despite the AID not receiving the command signal from the ECM.

The ECM sets the DTC based on the diagnostic information from the AID.