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The voltage at the AID terminal relating to the air pump is high despite the AID receiving no command signals from the ECM to drive the air pump. The ECM stores the DTC based on diagnostic signals from the AID. MONITOR STRATEGY Related DTCs P0418: Secondary air injection system air pump circuit range check (Bank 1) P0419: Secondary air injection system air pump circuit range check (Bank 2) Required Sensors/Components (Main) Air injection control driver Required Sensors/Components (Related) Air pump Duration 3 seconds MIL Operation 2 driving cycles TYPICAL ENABLING CONDITIONS Case 1 Monitor runs whenever following DTCs not present None Secondary air injection pump Operating Secondary air injection switching valve Operating Battery voltage 8 V or more Ignition switch ON Starter OFF Case 2 Monitor runs whenever following DTCs not present None Secondary air injection pump Not operating Secondary air injection switching valve Not operating Battery voltage 8 V or more Ignition switch ON Starter OFF TYPICAL MALFUNCTION THRESHOLDS Diagnostic signal duty ratio from air injection control driver 11% or more, and 29% or less COMPONENT OPERATING RANGE 1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0418,P0419; ... |