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For a short time after cold engine starts, the 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 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 DTC based on the diagnostic information from the AID. EXAMPLE: 1. 2. The AID outputs the normal signal (normal duty signal: 80%) while the system is not operating. 3. MONITOR STRATEGY Related DTCs P1613: Secondary air injection system air injection control driver circuit range check P1614: Secondary air injection system air injection control driver circuit range check Required Sensors/Components (Main) Air injection control driver Required Sensors/Components (Related) Air switching valve Duration 3 seconds MIL Operation Immediate TYPICAL ENABLING CONDITIONS Case 1 and 4: Monitor runs whenever following DTCs not stored None Battery voltage 8 V or more Ignition switch ON Starter OFF Case 2: Monitor runs whenever following DTCs not stored None Either a or b met: - a. Air pump Not operating b. Air switching valve Not operating Battery voltage 8 V or more Ignition switch ON Starter OFF 3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1613,P1614... |