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DTC NO. DTC DETECTION CONDITION TROUBLE AREA P0412 P0415 Secondary Air Injection (AIR) system not operating (air pump OFF, Air Switching Valve [ASV] OFF) a. Diagnostic signal from Air Injection Control Driver (AID) 40% b. Battery voltage 8 V or more c. Open in air switching valve circuit Air injection control driver Air switching valve assembly ECM P0412 P0415 Secondary Air Injection (AIR) system operating (air pump ON, Air Switching Valve [ASV] ON) a. Diagnostic signal from Air Injection Control Driver (AID) 40% b. Battery voltage 8 V or more c. Short between air switching valve circuit and body ground Air injection control driver Air switching valve assembly ECM MONITOR DESCRIPTION to the ECM. For a short time after a cold engine start, the ECM transmits command signals to the AID to drive the air pump and ASV. from the ECM to drive the ASV. The voltage at the AID terminal relating to the ASV is high despite the AID receiving no command signals from the ECM to drive the ASV. The ECM stores the DTC based on diagnostic signals from the AID. MONITOR STRATEGY Related DTCs P0412: Secondary air injection system air switching valve circuit range check (Bank 1) P0415: Secondary air injection system air switching valve circuit range check (Bank 2) Required Sensors/Components (Main) Air injection control driver Required Sensors/Components (Related) Air switching valve assembly 1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0412,P0415; ... |