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P0410

DTC P0410

CIRCUIT DESCRIPTION
The secondary air injection (AIR) system reduces exhaust emissions after initial engine starts. This occurs when the engine start-up coolant temperature and the intake air temperature (IAT) are at the parameters indicated in Conditions for Running. The AIR pump will continue to operate until Closed Loop operation is achieved.

The powertrain control module (PCM) activates the AIR system by simultaneously supplying a ground to the AIR pump relay and the AIR solenoid relay. The AIR pump forces pressurized fresh air into the pipes/hoses and past the AIR check valve into the bank 1 exhaust manifold, accelerating the catalyst operation. When the AIR system is inactive, the AIR shut-off valve prevents airflow in either direction. The PCM can detect an AIR system airflow fault by monitoring the heated oxygen sensor (HO2S) bank 1 sensor 1 during normal Closed Loop engine operation. This is an active test. The active test will pass or fail based on the response from the HO2S 1. The active test consists of three tests run at 3 second intervals. A decreasing HO2S 1 voltage parameter response indicates that the AIR system is functioning properly.

The AIR system consists of the following components:
- The AIR pump
- The AIR pump relay
- The AIR injection electronic shut-off valve
- The AIR injection solenoid relay
- The fuses, and the related wiring
- The pipes/hoses

When the PCM detects an insufficient HO2S 1 response, DTC P0410 sets.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC P0410 Secondary Air Injection (AIR) System

CONDITIONS FOR RUNNING THE DTC
- DTCs P0016, P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0125, P0128, P0130, P0131, P0132, P0133, P0134, P0135, P0136, P0137, P0138, P0140, P0141, P0150, P0151, P0152, P0153, P0154, P0155, P0171, P0172, P0174, P0175, P0201-P0208, P0300, P0335, P0336, P0351-P0358, P0401, P0403, P0404, P0405, P0412, P0418, P0420, P0442, P0443, P0446, P0449, P0452, P0453, P0455, P0496, P0506, P0507, P1133, P1134, P1153, P1154 are not set.
- The engine is running for more than 3 seconds.
- The engine speed is more than 1,000 RPM.
- The throttle is steady.
- The engine load is less than 80 percent.
- The system voltage is more than 10.5 volts.
- The manifold absolute pressure (MAP) is more than 30 kPa.
- The fuel system is in Closed Loop operation.
- The evaporative emissions (EVAP) purge is active.
- The intake air temperature is between 5-73°C (41-1 63°F).
- The start-up coolant temperature is 5-80°C (41-1 76°F).
- The mass air flow (MAF) is less than 75 g/s.
- The vehicle speed is between 56-72 km/h (35-45 mph).
- The engine is not operating in the following modes:
- Power Enrichment Mode
- Decel Fuel Cut-off Mode
- Catalyst Over-Temperature Mode
- DTC P0410 runs once the above conditions are met for 3 seconds, 3 consecutive times per key cycle, during which the AIR pump runs.

CONDITIONS FOR SETTING THE DTC
The HO2S 1 voltage parameter does not decrease to less than 150 mV during three, 3-second active tests.

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.
- Clear the MIL and the DTC with a scan tool.

DIAGNOSTIC AIDS

NOTE: Use the connector test adapter kit J 35616-A for any test that requires probing the following items:
- The PCM harness connectors
- The electrical center fuse/relay cavities
- The component terminals
- The component harness connector

Using this kit will prevent damage caused by the improper probing of connector terminals.
- Reviewing the Freeze Frame/Failure Records vehicle mileage since the diagnostic test last failed may help to diagnose the condition. The information may help to determine how often the condition that set the DTC occurs.
- The following conditions may cause this DTC to set:
- Low secondary AIR injection system airflow
- Excessive exhaust system back-pressure
- Reversed inlet and outlet hoses at the AIR pump will not allow airflow to the shut-off valve. The AIR pump inlet and outlet ports should be clearly identified on the pump.
- Reversed polarity at the AIR pump will cause a reduced air flow. The AIR pump positive and negative terminals should be clearly identified on the pump.
- An intermittent may be caused by any of the following conditions:
- Moisture, water, or debris ingestion into the AIR pump-This condition may also open the AIR pump fuse.
- Pinched, kinked, split, heat damaged or deteriorated pipes/hoses
- Restrictions in the AIR pump inlet hose or filter
- Step 17 may have directed you here due to the following conditions which may not set DTC P0410:
- An AIR shut-off valve that is sticking open may cause an audible exhaust noise to be heard through the air pump and the inlet hose. This condition may cause the fuel trim parameters to indicate a high percentage value at an idle, a fuel trim DTC is possible.
- A short to voltage on the supply voltage circuit of the AIR solenoid will hold the electronic shut-off valve open. This condition may cause an audible exhaust noise to be heard through the air pump and inlet hose and may cause the fuel trim parameters to indicate a high percentage value at an idle, a fuel trim DTC is possible.
- An AIR solenoid relay which has internal contacts that stick closed, will hold the AIR electronic shut-off valve open. This condition may cause an audible exhaust noise to be heard through the air pump and inlet hose and may cause the fuel trim parameters to indicate a high percentage value at an idle, a fuel trim DTC is possible.
- If the condition is intermittent, refer to Intermittent Conditions. Diagnostic Strategies
- If an electrical intermittent fault is suspected, refer to Testing for Electrical Intermittents in Diagnostic Aids.

TEST DESCRIPTION

Steps 1-8:




Steps 9-17:




Steps 18-25:




Steps 26-35:




Steps 36-45:




Steps 46-59:




Steps 60-62:




The numbers below refer to the step numbers in the diagnostic table.
11. This step determines if excessive resistance in the AIR pump supply voltage circuit is the cause for an inoperative AIR pump. Two ohms of resistance on this circuit prevents the AIR pump from operating. A voltage drop test must be preformed to verify circuit integrity.
12. This step determines if excessive resistance in the AIR pump ground circuit is the cause for an inoperative AIR pump. Two ohms of resistance on this circuit prevents the AIR pump from operating. A voltage drop test must be preformed to verify circuit integrity.
17. This step verifies normal operation of the AIR system.
22. This step verifies normal operation of the AIR electronic shut-off valve.
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