| Table 1: | DTC P0410 - Secondary Air Injection (AIR) System |
Circuit Description
An AIR pump is used on this vehicle to lower tail pipe emissions on start-up. The PCM supplies a ground to the AIR pump relay, which energizes the AIR pump.
The PCM monitors the HO2S voltages to diagnose the AIR system.
During the AIR test, the PCM activates the AIR pump during closed loop operation. When the AIR is activated, the PCM monitors 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.
If the PCM determines that the HO2S voltages for both banks did not respond as expected during the tests, DTC P0410 sets. If only one sensor responded, the PCM sets either a DTC P1415 or P1416 to indicate on which bank the AIR system is inoperative.
Conditions for Running the DTC
| • | DTCs P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0125, P0171-P0175, P0200, P0300, P0335, P0336, P0351-P0358, P0440, P0442, P0443, P0446, P0449, P1120, P1220, P1221, P1258, P1441 and HO2S DTCs are not set. |
| • | Fuel level greater than 12.5 percent but less than 87.5 percent. |
| • | The engine is running for greater than 2.0 seconds. |
| • | The maximum air flow is 25 g/s. |
| • | The air fuel ratio is 14.7:1 |
| • | The engine load is less than 34 percent. |
| • | The ignition voltage is greater than 11.7 volts. |
| • | Engine is not operating in Power Enrichment, Decel Fuel Shut-off, or Catalyst Over-Temperature modes. |
| • | The engine is operating in closed loop for greater than 15 seconds. |
| • | The engine speed is greater than 718 RPM. |
| • | The ECT is greater than 80°C (176°F) but less than 110°C (230°F). |
| • | The IAT is greater than -2°C (28.4°F). |
| • | The fuel system is operating in fuel trim cells 1, 2, 4, 5, or 6. |
Conditions for Setting the DTC
The HO2S voltage does not go below 222 mV for 1.3 seconds, when the AIR pump turns ON during closed loop operation.
OR
The short term fuel trim does not change more than a predetermined value, when the AIR pump turns ON during closed loop operation.
Action Taken When the DTC Sets
| • | The PCM illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails. |
| • | The PCM records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the PCM stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the PCM records the operating conditions at the time of the failure. The PCM writes the conditions to the Freeze Frame and updates the Failure Records. |
Conditions for Clearing the MIL/DTC
| • | The PCM turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail. |
| • | A last test failed, or current DTC, clears when the diagnostic runs and does not fail. |
| • | 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
Important:
• Remove any debris from the PCM connector surfaces before servicing
the PCM. Inspect the PCM connector gaskets when diagnosing/replacing
the module. Ensure that the gaskets are installed correctly.
The gaskets prevent contaminate intrusion into the PCM. • For any test that requires probing the PCM or a component
harness connector, use the Connector Test Adapter Kit J 35616
. Using this kit prevents damage
to the harness/component terminals. Refer to
Using Connector Test Adapters
in Wiring Systems.
AIR Pump Relay Underhood Electrical Center Terminal Identification | |||
|---|---|---|---|
Front of Vehicle | |||
Left Side of Vehicle | Ignition | B+ | Right Side of Vehicle |
Load | Control | ||
| • | If DTCs P0412 or P0418 are not set and the relay or solenoid does not respond to the scan tool commands, inspect for excessive resistance in all of the circuits associated with the AIR system. |
| • | For an intermittent, refer to Symptoms . |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
If DTCs P0412 or P0418 are set, diagnose those DTCs first.
-
The scan tool offers three modes of AIR operation, AIR solenoid, AIR pump, and AIR system. Use the AIR system selection when commanding the AIR pump, or relays. This mode ensures that the entire AIR system is responding to the scan tool commands. If DTCs P0412 or P0418 are not set and the relay or solenoid does not respond to the scan tool commands, inspect for excessive resistance in all of the circuits associated with the AIR system.
-
This step is testing for battery voltage at the AIR pump relay.
-
This step is testing for power to the AIR pump.
-
This step is testing the ground circuit for the AIR pump.
-
This step is testing for a grounded circuit between the AIR pump and the AIR pump relay.
-
A restriction in a hose or pipe before the systems divides will cause this DTC to set. Inspect for kinks or blockages from the AIR pump to the connection point where the AIR system divides.
Step | Action | Values | Yes | No | ||||
|---|---|---|---|---|---|---|---|---|
1 | Did you perform the Powertrain On-Board Diagnostic (OBD) System Check? | -- | ||||||
2 | Is the AIR pump fuse OK? | -- | ||||||
Are DTCs P0412 or P0418 set? | -- | Go to Applicable DTC table | ||||||
Does the AIR pump turn ON? | -- | |||||||
Does the test lamp illuminate? | -- | |||||||
Does the test lamp illuminate? | -- | |||||||
Probe terminal B of the AIR pump electrical connector with the test lamp J 35616-200 connected to B+. Is the test lamp illuminated? | -- | |||||||
8 |
Is air flow present at the AIR pump outlet? | -- | ||||||
9 |
Is a vacuum present at the AIR Shut Off valve? | -- | ||||||
10 |
Did you find and correct the condition? | -- | ||||||
11 |
Does the test lamp illuminate? | -- | ||||||
Does the test lamp illuminate? | -- | |||||||
13 |
Does the fuse open? | -- | Go to Diagnostic Aids | |||||
14 |
Is air present at the outlet of the AIR Shut Off Valve? | -- | ||||||
15 | Replace the AIR Shut Off Valve. Refer to Secondary Air Injection Shut Off Valve Replacement . Is the action complete? | -- | -- | |||||
16 | Repair the open circuit that did illuminate the test lamp. Refer to Wiring Repairs in Wiring Systems. Is the action complete? | -- | -- | |||||
17 |
Did you find and correct the condition? | -- | ||||||
18 | Repair the faulty ground connection or open AIR pump ground circuit. Refer to Wiring Repairs in Wiring Systems. Is the action complete? | -- | -- | |||||
19 |
Is a vacuum present at the AIR Solenoid Valve? | -- | ||||||
20 |
Is a vacuum present at the AIR Solenoid Valve outlet? | -- | ||||||
21 | Repair the restriction/blockage or damage to the vacuum hose. Is the action complete? | -- | -- | |||||
Repair the restriction/blockage or disconnect in the AIR hose between the AIR Shut Off Valve and the point where the system branches to both side of the engine. Is the action complete? | -- | -- | ||||||
23 | Repair the short to ground in the ignition feed circuit between the fuse and the relays. Refer to Wiring Repairs in Wiring Systems. Is the action complete? | -- | -- | |||||
24 | Repair the short to ground in the circuit between the AIR pump relay and the AIR pump. Refer to Wiring Repairs in Wiring Systems. Is the action complete? | -- | -- | |||||
25 | Replace the AIR pump relay. Refer to Secondary Air Injection Pump Relay Replacement . Is the action complete? | -- | -- | |||||
26 | Replace the AIR Solenoid Valve. Refer to Secondary Air Injection Solenoid Valve Replacement . Is the action complete? | -- | -- | |||||
27 |
Did you find and correct the condition? | -- | ||||||
28 | Replace the AIR pump. Refer to Secondary Air Injection Pump Replacement . Is the action complete? | -- | -- | |||||
29 |
Does the scan tool indicate that this test failed? | -- | ||||||
30 | Select the Capture Info option and the Review Info option using the scan tool. Are any DTCs displayed that you have not diagnosed? | -- | Go to the applicable DTC table | System OK |
