| 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. |
| • | The engine is running for greater than 2.0 seconds. |
| • | The maximum air flow is 22 g/s. |
| • | The Air Fuel ratio is 14.7:1 |
| • | The engine load is less than 40%. |
| • | 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 725 RPM. |
| • | The ECT is greater than 80°C (176°F) but less than 110°C (230°F). |
| • | The IAT is greater than -10°C (-14°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 1.2 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\TAC module connector surfaces before
servicing the PCM\TAC module. Inspect the PCM\TAC module connector gaskets
when diagnosing/replacing the modules. Ensure that the gaskets are installed
correctly. The gaskets prevent contaminate intrusion into the PCM\TAC
modules. • 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 | ||
AIR Solenoid Relay Underhood Electrical Center Terminal Identification | |||
|---|---|---|---|
Front of Vehicle | |||
Left Side of Vehicle | Ignition | Load | Right Side of Vehicle |
B+ | Control | ||
| • | Using Freeze Frame and/or Failure Records data may aid in locating an intermittent condition. If you cannot duplicate the DTC, the information included in the Freeze Frame and/or Failure Records data can aid in determining how many miles since the DTC set. The Fail Counter and Pass Counter can also aid determining how many ignition cycles the diagnostic reported a pass and/or a fail. Operate the vehicle within the same freeze frame conditions (RPM, load, vehicle speed, temperature etc.) that you observed. This isolates when the DTC failed. |
| • | 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.
-
This step is testing for battery voltage at the AIR pump relay and the AIR solenoid relay. If voltage is not present at both of the AIR relays the AIR system does not operate properly.
-
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 relays do 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 power to the AIR pump.
-
This step is testing the ground circuit for the AIR pump.
-
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.
-
This step is testing for a grounded circuit between the AIR pump and the AIR pump relay.
-
This step is testing for a grounded circuit between the AIR pump and the AIR solenoid relay.
Step | Action | Value(s) | Yes | No | ||||
|---|---|---|---|---|---|---|---|---|
1 | Did you perform the Powertrain On-Board Diagnostic (OBD) System Check? | -- | ||||||
Are DTCs P0412 and/or P0418 set? | -- | Go to Applicable DTC table | ||||||
3 | Is the AIR pump fuse OK? | -- | ||||||
Does the test lamp illuminate for both terminals? | -- | |||||||
Does the AIR pump turn ON? | -- | |||||||
Is the test lamp illuminated? | -- | |||||||
Probe terminal C of the AIR pump electrical connector using 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 the test lamp illuminated? | -- | ||||||
Is the action complete? | -- | -- | ||||||
11 |
Does the test lamp illuminate for both terminals? | -- | ||||||
Does the test lamp illuminate? | -- | |||||||
Probe the AIR pump relay load terminal at the underhood electrical center using the test lamp J 35616-200 connected to B+. Refer to Diagnostic Aids for terminal identification. Does the test lamp illuminate? | -- | |||||||
14 |
Does the fuse open? | -- | ||||||
15 |
Does the fuse open? | -- | Go to Diagnostic Aids | |||||
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 |
Did you find and correct the condition? | -- | ||||||
20 | 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? | -- | -- | |||||
21 | Repair the short to ground in the circuit between the AIR Solenoid relay and the AIR pump. Refer to Wiring Repairs in Wiring Systems. Is the action complete? | -- | -- | |||||
22 | 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? | -- | -- | |||||
23 | Replace the AIR pump relay. Refer to Secondary Air Injection Pump Relay Replacement . Is the action complete? | -- | -- | |||||
24 | Replace the AIR solenoid relay. Refer to Secondary Air Injection Solenoid Relay Replacement . Is the action complete? | -- | -- | |||||
25 |
Did you find and correct the condition? | -- | ||||||
26 | Replace the AIR pump. Refer to Secondary Air Injection Pump Replacement . Is the action complete? | -- | -- | |||||
27 |
Does the scan tool indicate that this test failed? | -- | ||||||
28 | 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 |
