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For 1990-2009 cars only

DTC P1415 Single AIR Pump System

Circuit Description

The secondary air injection (AIR) pump used on this vehicle lowers the tail pipe emissions during start-up. The AIR system consists of the following components:

    • The AIR pumps
    • The shut-off valves
    • The vacuum control solenoid valve
    • The system hoses and pipes
    • The AIR relays, the fuses, and the related wiring

The powertrain control module (PCM) uses the AIR relay in order to control the AIR pump. The PCM also controls the AIR vacuum control solenoid valve that supplies the vacuum to the AIR shut-off valves. With the AIR system inactive, the AIR shut-off valves prevent air flow in either direction. With the AIR system active, the PCM applies ground to the AIR relay and to the vacuum control solenoid valve. Fresh air flows from the pump, through the system hoses, past the shut-off valves, and into the exhaust stream. The air helps the catalyst to quickly get to a working temperature, lowering the tail pipe emissions during a start-up.

The PCM tests the following AIR system components:

    • The overall AIR system, including both banks -- Any problems detected here will result in diagnostic trouble code (DTC) P0410.
    • The AIR system Bank 1 (DTC P1415)
    • AIR system Bank 2 (DTC P1416)
    • AIR relay (DTC P0418)
    • AIR vacuum control solenoid valve (DTC P0412)

The PCM runs a passive test and an active test in order to diagnose the AIR system. Both tests involve a response from the fuel control HO2S (HO2S bank 1 sensor 1 and HO2S bank 2 Sensor 2). The passive test consists of 2 parts. If both passive tests pass, the PCM takes no further action. If either part of the passive test fails or is inconclusive, the PCM initiates the active tests. If the PCM determines that HO2S bank 1 sensor 1 did not respond as expected during the tests, DTC P1415 will set. For further information concerning the AIR system and the system tests, refer to Secondary Air Injection System Description .

Conditions for Running the DTC

Passive Tests:

    • The engine is running.
    • The engine speed is more than 600 RPM.
    • The throttle is steady.
    • The engine load is less than 80 percent.
    • The system voltage is more than 10.5 volts.
    • The mass air flow (MAF) is less than 35 g/s.
    • The air/fuel ratio is more than 12.5:1.
    • The engine coolant temperature (ECT) is between 0-108°C (32-226°F).
    • The IAT is between 0- 60°C (32-140°F).
    • The power enrichment, or deceleration fuel cut-off is not active.

Active Tests:

    • The engine is running.
    • The engine speed is more than 600 RPM.
    • The throttle is steady.
    • The engine load is less than 80 percent.
    • The system voltage is more than 10.5 volts.
    • The MAF is less than 35 g/s.
    • The fuel system is in closed-loop operation.
    • The EVAP purge is active.
    • The ECT is above 68°C (154°F).

Conditions for Setting the DTC

Passive Tests:

    • During the operation of the AIR pump, the HO2S bank 1 sensor 1 voltage remains above 470 mV for 20 seconds, and above 450 mV for 7 seconds during a hot start.
        OR
        With the AIR pump commanded OFF, the HO2S bank 1 sensor 1 voltage remains below 700 mV for 25 seconds.
    • The PCM initiates the active test due to a failed or an indeterminate passive test.

Active Test

    • A failed or an indeterminate passive test has occurred.
    • The HO2S bank 1 sensor 1 voltage remains above 35 mV.
    • The PCM detects a failed passive test and 2 failed active tests.
        OR
        The PCM records an indeterminate passive test and 3 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

If the condition is intermittent, refer to Intermittent Conditions .

Step

Action

Values

Yes

No

Schematic Reference: Engine Controls Schematics

1

Did you perform the Diagnostic System Check-Engine Controls?

--

Go to Step 2

Go to Diagnostic System Check - Engine Controls

2

  1. Install a scan tool.
  2. Idle the engine in Closed Loop.
  3. Turn OFF all the accessories.
  4. Monitor the HO2S bank 1 sensor 1 voltage display on the scan tool.
  5. Enable the AIR system using a scan tool.
  6. Observe and record the HO2S voltage while the AIR system is enabled.

Does the HO2S voltage drop below the specified value?

350 mV

Go to Diagnostic Aids

Go to Step 3

3

  1. Turn OFF the ignition.
  2. Disconnect the vacuum line from the bank 1 shut-off valve.
  3. Connect a vacuum gauge to the vacuum line.
  4. Start and idle the engine.
  5. Enable the AIR system using the scan tool.

Does the vacuum gauge indicate vacuum?

--

Go to Step 4

Go to Step 5

4

Inspect all pipes and hoses for the following conditions:

    • Proper connections
    • Secure clamps on the pipes and on the hoses
    • Block, holes, or pinches
    • Components with evidence of heat damage

Did you locate the condition?

--

Go to Step 6

Go to Step 7

5

Replace the vacuum line between the AIR solenoid valve and the bank 1 AIR shut-off valve.

Did you complete the replacement?

--

Go to Step 8

--

6

Repair the condition. Refer to Secondary Air Injection Pipe Replacement - Bank 1 , Secondary Air Injection Pipe Replacement - Bank 2 .

Did you complete the repair?

--

Go to Step 8

--

7

Replace the bank 1 AIR shut-off valve. Refer to Secondary Air Injection Control Valve Replacement - Bank 1 .

Did you complete the replacement?

--

Go to Step 8

--

8

  1. Use the scan tool in order to clear the DTCs.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. Operate the vehicle within the Conditions for Running the DTC, as specified in the supporting text.

Does the DTC run and pass?

--

Go to Step 9

Go to Step 2

9

Select the Capture Info option and the Review Info option using the scan tool.

Does the scan tool display any DTCs that you have not diagnosed?

--

Go to Diagnostic Trouble Code (DTC) List

System OK

DTC P1415 Dual AIR Pump System

Circuit Description

The two AIR pumps used on this vehicle lower tail pipe emissions during start-up. The AIR system consists of the following items:

    • The AIR pumps
    • The check valves
    • The vacuum solenoid
    • The system hoses and pipes
    • The AIR relays, fuses, and related wiring

The PCM uses the AIR relays to control the AIR pumps. The PCM also controls the AIR vacuum solenoid that supplies vacuum to the AIR check valves. With the AIR system inactive, the AIR check valves prevent air flow in either direction. With the AIR system active, the PCM applies ground to one of the AIR relays, and the vacuum solenoid. Then the PCM applies ground to the other AIR relay. Fresh air flows from the pumps, through the system hoses, pass the check valves, and into the exhaust stream. The air helps the catalyst to quickly reach a working temperature; thus lowering the tail pipe emissions on a start-up. The PCM tests the following AIR system components:

    • The overall AIR system, including both bank--Any problems detected here will result in DTC P0410.
    • The AIR system bank 1 (DTC P1415)
    • AIR system bank 2 (DTC P1416)
    • AIR relays (DTC P0418 and DTC P0419)
    • AIR vacuum control solenoid (DTC P412)

The PCM runs two tests to diagnose the AIR system: Passive and Active. Both tests involve a response from the fuel control HO2 sensors (HO2S bank 1 sensor 1 and HO2S bank 2 sensor 2). The Passive test consists of two parts. If both passive tests pass, the PCM takes no further action. If either part of the passive test fails, or is inconclusive, the PCM initiates the Active tests. If the PCM determines that HO2S bank 1 sensor 1 did not respond as expected during the tests, DTC P1415 will set. For further information concerning the AIR system and system tests, refer to Secondary Air Injection System Description .

Conditions for Running the DTC

Passive Tests:

    • The engine is running.
    • The engine speed is more than 600 RPM.
    • The throttle is steady
    • The engine load is less than 80 percent.
    • The system voltage is more than 10.5 volts.
    • The MAF is less than 35 g/s.
    • The air fuel ratio is more than 12.5:1
    • The ECT is between 0-108°C (32-226°F).
    • The IAT is between 0-60°C (32-140°F).
    • The power enrichment, or deceleration fuel cut-off (DFCO) is not active.

Active Tests:

    • The engine is running.
    • The engine speed is more than 600 RPM.
    • The throttle is steady.
    • The engine load is less than 80 percent.
    • The system voltage is more than 10.5 volts.
    • The MAF is less than 35 g/s.
    • The fuel system is in closed-loop operation.
    • The EVAP purge is active.
    • The ECT is above 68°C (154°F).

Conditions for Setting the DTC

Passive Tests:

    • During the operation of the AIR pumps, HO2S bank 1 sensor 1 voltage remains above 470 mV for 20 seconds (450 mV for 7 seconds on a hot start).
        OR
    • When the AIR pumps are turned OFF, HO2S bank 1 sensor 1 voltage remains below 700 mV for 25 seconds.
    • The PCM initiates the active test due to a failed or an indeterminate passive test.

Active Test:

    • A failed or an indeterminate passive test
    • The HO2S bank 1 sensor 1 voltage remains above 35 mV.
    • The PCM detects a failed passive test and two failed active tests.
        or
    • The PCM records an indeterminate passive test and three active tests.

Action Taken When the DTC Sets

    • The PCM illuminates the malfunction indicator lamp (MIL) during the second consecutive trip in which the diagnostic test runs and fails.
    • The PCM stores the conditions present when the DTC set as Freeze Frame/Failure Records data.

Conditions for Clearing the MIL/DTC

    • The PCM will turn the MIL OFF after the third consecutive trip in which the diagnostic runs and passes.
    • The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
    • The DTC can be cleared by using the scan tool Clear DTC Information function.

Diagnostic Aids

If the condition is intermittent, refer to Intermittent Conditions .

Step

Action

Values

Yes

No

Schematic Reference: Engine Controls Schematics

1

Did you perform the Diagnostic System Check-Engine Controls?

--

Go to Step 2

Go to Diagnostic System Check - Engine Controls

2

Are any of the following DTCs set?

    • DTC P0410
    • DTC P0412
    • DTC P0418

--

Go to Diagnostic Trouble Code (DTC) List

Go to Step 3

3

Check for an open AIR pump A fuse.

Is the fuse open?

--

Go to Step 11

Go to Step 4

4

With the scan tool installed, command the AIR pump bank 1 ON and OFF.

Does the AIR pump turn ON and OFF?

--

Go to Step 12

Go to Step 5

5

Is the AIR pump running continuously?

--

Go to Step 9

Go to Step 6

6

  1. Remove the AIR relay.
  2. Important: DO NOT let AIR pump run for more than 60 seconds.

  3. Using the appropriate jumper connectors, jumper the battery positive feed and the AIR pump feed cavities in the relay connector.

Is the AIR pump running?

--

Go to Step 8

Go to Step 7

7

  1. Check for the following circuit conditions:
  2. • An open battery positive feed circuit between the AIR pump A fuse and the AIR relay
    • An open AIR pump feed circuit
    • An open/poor connection at the AIR pump ground circuit
    • Faulty connections at the AIR pump
  3. If the condition is found, repair as necessary. Refer to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 20

Go to Step 16

8

  1. Check for poor terminal connections in the relay connector.
  2. If the condition is found, repair as necessary. Refer to Connector Repairs or Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 20

Go to Step 17

9

Remove the AIR pump relay A.

Is the AIR pump running?

--

Go to Step 10

Go to Step 17

10

Locate and repair the short to voltage in the circuit between the AIR pump relay A and the AIR pump. Refer to Wiring Repairs in Wiring Systems.

Is the action complete?

--

Go to Step 20

--

11

  1. Check for the following circuit conditions:
  2. • A short to ground in the circuit between the AIR pump A fuse and the AIR pump relay A.
    • A short to ground in the circuit between the AIR pump relay A and the AIR pump A.
  3. If the condition is found, repair as necessary. Refer to Wiring Repairs in Wiring Systems.
  4. Important: Replace the AIR pump fuse.

Did you find and correct the condition?

--

Go to Step 20

Go to Step 16

12

  1. Disconnect the bank 1 AIR hose/pipe from the AIR shut-off valve.
  2. Using the scan tool, turn ON the AIR pump A.

Is air flow present?

--

Go to Step 13

Go to Step 15

13

  1. Reconnect the bank 1 AIR hose/pipe to the AIR shut-off valve.
  2. Disconnect and plug the vacuum line between the AIR vacuum solenoid and the AIR shut-off valve.
  3. Start and idle the engine.
  4. Connect a vacuum pump and a piece of vacuum line to the AIR shut-off valve.
  5. Apply 40.63 kPa (12 in Hg) to the AIR shut-off valve.
  6. Observe the HO2S bank 1 sensor 1 voltage while commanding the AIR pump ON.

Is the HO2S bank 1 sensor 1 voltage below the specified value?

200 mV

Go to Step 18

Go to Step 14

14

  1. Check the bank 1 AIR hose or pipe between the shut-off valve and the exhaust manifold for the following conditions:
  2. • Any blockages or restrictions
    • A kinked, pinched, or damaged condition
    • A faulty connection at the AIR shut-off valve or the exhaust manifold
  3. If the condition is found, repair as necessary.

Did you find and correct the condition?

--

Go to Step 20

Go to Step 19

15

  1. Check the bank 1 AIR hose or pipe between the AIR pump and AIR shut-off valve for the following conditions:
  2. • Any blockages or restrictions
    • A kinked, pinched, or damaged condition
    • Faulty or damaged connections at the AIR pump
  3. If the condition is found, repair as necessary.

Did you find and correct the condition?

--

Go to Step 20

Go to Step 16

16

Replace the AIR pump A. Refer to Secondary Air Injection Pump Replacement - Bank 1 .

Is the action complete?

--

Go to Step 20

--

17

Replace the AIR pump relay A.

Is the action complete?

--

Go to Step 20

--

18

Replace the vacuum line between the AIR vacuum solenoid and the AIR check valve.

Is the action complete?

--

Go to Step  20

--

19

Replace the bank 1 AIR shut-off valve.

Is the action complete?

--

Go to Step 20

--

20

  1. Review and record the scan tool Failure Records information.
  2. Clear the DTCs.
  3. Operate the vehicle within the Failure Records conditions.

  4. Monitor the scan tool Specific DTC Information for DTC P1415 until the test runs.

Does the scan tool indicate that DTC P1415 passed?

--

System OK

Go to Step 2