P0410
CIRCUIT DESCRIPTIONAn Secondary Air Injection (AIR) pump is used on this vehicle to lower fail pipe emissions at start-up. The Powertrain Control Module (PCM) supplies a ground to the AIR pump relay, which energizes the AIR pump and the AIR solenoid.
When the AIR pump is enabled, the PCM monitors the Heated Oxygen Sensor (HO2S) voltage. If the HO2S voltages go below a calibrated threshold value, the PCM interprets this as an indication that the AIR system is operational.
When the AIR pump is disabled, the PCM monitors the HO2S voltages. The HO2S voltages should increase above a calibrated threshold value and switch normally.
If the PCM did not sense more than a predetermined amount of HO2S rich switches, a malfunction will be reported.
The PCM will activate the AIR pump during Closed Loop operation. When the AIR system is activated, the PCM will monitor the HO2S voltages and short term fuel trim values for both banks of the engine. If the AIR system is operating properly, the HO2S voltages should go low and the short term fuel trim should go high.
The PCM checks that the HO2S voltages return to above a rich threshold when the AIR pump is disabled.
If the PCM determines that the HO2S voltages for both banks did not respond as expected during the tests, DTC P0410 will set. If only one sensor responded, the PCM will set either a DTC P1415 or P1416 to indicate on which bank the AIR system is inoperative.
CONDITIONS FOR RUNNING THE DTC
^ DTCs P0137, P0138, P0140, P0141, P0143, P0144, P0146, P0147, P0151-P0155, P0157, P0158, P0160, P0161, P0171, P0172, P0174, P0175, P0300, P0500, P1106, P1107, P1111, P1112, P1114, P1115, P1121, P1122, P1133, P1134, P1153, P1154, P1351, or P1361 are not set.
^ The Mass Air Flow (MAF) is less than 22 g/s.
^ The engine load is less than 33.25 percent.
^ The power enrichment mode is not active.
^ The Decel Fuel Cutoff (DFCO) mode is not active.
^ The converter over temperature is not active.
^ The engine run time after Closed Loop is more than 20 seconds.
^ The air/fuel ratio is 13.125:1.
^ The short term fuel trim is between -3 and +3 percent.
^ The engine speed is above 900 RPM.
^ The Engine Coolant Temperature (ECT) is between 70-110°C (158-230°F).
^ The system voltage is more than 11.7 volts.
^ The Intake Air Temperature (IAT) is between 2-100°C (36-212°F).
^ The vehicle speed is more than 15 km/h (25 mph).
CONDITIONS FOR SETTING THE DTC
The HO2S voltage is less than 222 mV for more than 1 second when the AIR pump is enabled.
ACTION TAKEN WHEN THE DTC SETS
^ The control module illuminates the Malfunction Indicator Lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
^ The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.
CONDITIONS FOR CLEARING THE MIL/DTC
^ The control module turns OFF the Malfunction Indicator Lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
^ A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
^ A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
^ Use a scan tool in order to clear the MIL and the DTC.
DIAGNOSTIC AIDS
A low AIR system volume may cause a DTC P1415, P1416, or an intermittent complaint. Also check for the following conditions:
^ Pinched, kinked, or restricted AIR pipes, hoses or fittings
^ Leaks, holes, and loose fittings or hoses
^ A restricted or obstructed AIR pump inlet
^ Leaks or restrictions in the vacuum hoses for the AIR shut-off valve
An AIR supply hose that is melted before the check valve may indicate exhaust gas back-flow past the check valve.
An intermittent may be caused by any of the following conditions:
^ A poor connection
^ Rubbed through wire insulation
^ A broken wire inside the insulation
Thoroughly inspect any circuitry that is suspected of causing the intermittent complaint. Refer to Testing for Intermittent and Poor Connections in Diagrams.
If a repair is necessary, refer to Wiring Repairs or Connector Repairs in Diagrams.
TEST DESCRIPTION
Steps 1-11:
Steps 12-19:
Steps 20-31:
Steps 32-47:
Steps 48-50:
The numbers below refer to the step numbers on the diagnostic table.
4. This step will determine if the AIR system is functioning correctly.
18. The engine must be running for this test to ensure a vacuum supply to the system.
20. This step will determine if the AIR pump is capable of producing airflow.
23. This step will determine if the PCM is capable of controlling the AIR pump relay.