DIC code PCM P0410
Heel & Toe
Joined: May 2002
Posts: 18
Likes: 0
From: CA
Re: DIC code PCM P0410 (Legacy)
P0410
Notes
CIRCUIT DESCRIPTION
A secondary air injection (AIR) pump is used on this vehicle in order to lower the tail pipe emissions during start-up. The powertrain control module (PCM) supplies a ground to the AIR pump relay, which energizes the AIR pump.
The PCM monitors the heated oxygen sensor (HO2S) voltages in order 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 monitors the short-term fuel trim values for both banks of the engine. If the AIR system is operating correctly, the HO2S voltages should be low, and the short-term fuel trim should be high.
If the PCM determines that the HO2S voltages for both banks did not respond with the expected results during the tests, DTC P0410 sets. If only 1 sensor responded, the PCM sets either DTC P1415 or DTC P1416. The active DTC indicates which bank has the inoperative AIR system.
CONDITIONS FOR RUNNING THE DTC
DTCs P0101-P0103, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0125, P0171-P0175, P0200, P0300, P0335, P0336, P0351-P0358, P0440, P0442, P0443, P0446, P0449, P1120, P1220, P1221, P1258, or P1441 are not set.
The fuel level is more than 12.5 percent but less than 87.5 percent .
The engine is running for more than 30 seconds .
The maximum air flow is 22 g/s .
The air fuel ratio is 13.125:1.
The engine load is less than 40 percent .
The ignition voltage is more than 11.7 volts .
Vehicle speed is more than 15 km/h (25 mph ).
The engine is not operating in any of the following modes:
Power enrichment
Decel fuel cut-off mode
The catalyst over temperature
The engine is operating in a closed loop for more than 15 seconds .
The engine speed is more than 850 RPM .
The engine coolant temperature (ECT) is between than -10°C to +110°C (14°F-230°F ).
The intake air temperature (IAT) is between -10°C to +100°C (14°F-212°F ).
The fuel system is operating in fuel trim cells 1,2,4,5, or 6.
CONDITIONS FOR SETTING THE DTC
If the AIR pump turns ON during a closed loop operation and the HO2S voltage does not fall below 222 mV for 1.3 seconds .
Or
If the AIR pump turns ON during a closed loop operation and the short-term fuel trim does not change more than a predetermined amount.
ACTION TAKEN WHEN THE DTC SETS
The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame/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.
Notes
CIRCUIT DESCRIPTION
A secondary air injection (AIR) pump is used on this vehicle in order to lower the tail pipe emissions during start-up. The powertrain control module (PCM) supplies a ground to the AIR pump relay, which energizes the AIR pump.
The PCM monitors the heated oxygen sensor (HO2S) voltages in order 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 monitors the short-term fuel trim values for both banks of the engine. If the AIR system is operating correctly, the HO2S voltages should be low, and the short-term fuel trim should be high.
If the PCM determines that the HO2S voltages for both banks did not respond with the expected results during the tests, DTC P0410 sets. If only 1 sensor responded, the PCM sets either DTC P1415 or DTC P1416. The active DTC indicates which bank has the inoperative AIR system.
CONDITIONS FOR RUNNING THE DTC
DTCs P0101-P0103, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0125, P0171-P0175, P0200, P0300, P0335, P0336, P0351-P0358, P0440, P0442, P0443, P0446, P0449, P1120, P1220, P1221, P1258, or P1441 are not set.
The fuel level is more than 12.5 percent but less than 87.5 percent .
The engine is running for more than 30 seconds .
The maximum air flow is 22 g/s .
The air fuel ratio is 13.125:1.
The engine load is less than 40 percent .
The ignition voltage is more than 11.7 volts .
Vehicle speed is more than 15 km/h (25 mph ).
The engine is not operating in any of the following modes:
Power enrichment
Decel fuel cut-off mode
The catalyst over temperature
The engine is operating in a closed loop for more than 15 seconds .
The engine speed is more than 850 RPM .
The engine coolant temperature (ECT) is between than -10°C to +110°C (14°F-230°F ).
The intake air temperature (IAT) is between -10°C to +100°C (14°F-212°F ).
The fuel system is operating in fuel trim cells 1,2,4,5, or 6.
CONDITIONS FOR SETTING THE DTC
If the AIR pump turns ON during a closed loop operation and the HO2S voltage does not fall below 222 mV for 1.3 seconds .
Or
If the AIR pump turns ON during a closed loop operation and the short-term fuel trim does not change more than a predetermined amount.
ACTION TAKEN WHEN THE DTC SETS
The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame/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.
Heel & Toe
Joined: May 2002
Posts: 18
Likes: 0
From: CA
Re: DIC code PCM P0410 (22inchDenali)
CIRCUIT DESCRIPTION
A secondary air injection (AIR) pump is used on this vehicle in order to lower the tail pipe emissions during start-up. The powertrain control module (PCM) supplies a ground to the AIR pump relay, which energizes the AIR pump.
The PCM monitors the heated oxygen sensor (HO2S) voltages in order 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 monitors the short-term fuel trim values for both banks of the engine. If the AIR system is operating correctly, the HO2S voltages should be low, and the short-term fuel trim should be high.
If the PCM determines that the HO2S voltages for both banks did not respond with the expected results during the tests, DTC P0410 sets. If only 1 sensor responded, the PCM sets either DTC P1415 or DTC P1416. The active DTC indicates which bank has the inoperative AIR system.
CONDITIONS FOR RUNNING THE DTC
DTCs P0101-P0103, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0125, P0171-P0175, P0200, P0300, P0335, P0336, P0351-P0358, P0440, P0442, P0443, P0446, P0449, P1120, P1220, P1221, P1258, or P1441 are not set.
The fuel level is more than 12.5 percent but less than 87.5 percent .
The engine is running for more than 30 seconds .
The maximum air flow is 22 g/s .
The air fuel ratio is 13.125:1.
The engine load is less than 40 percent .
The ignition voltage is more than 11.7 volts .
Vehicle speed is more than 15 km/h (25 mph ).
The engine is not operating in any of the following modes:
Power enrichment
Decel fuel cut-off mode
The catalyst over temperature
The engine is operating in a closed loop for more than 15 seconds .
The engine speed is more than 850 RPM .
The engine coolant temperature (ECT) is between than -10°C to +110°C (14°F-230°F ).
The intake air temperature (IAT) is between -10°C to +100°C (14°F-212°F ).
The fuel system is operating in fuel trim cells 1,2,4,5, or 6.
CONDITIONS FOR SETTING THE DTC
If the AIR pump turns ON during a closed loop operation and the HO2S voltage does not fall below 222 mV for 1.3 seconds .
Or
If the AIR pump turns ON during a closed loop operation and the short-term fuel trim does not change more than a predetermined amount.
ACTION TAKEN WHEN THE DTC SETS
The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame/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
IMPORTANT:
Before you service the PCM or the throttle actuator control (TAC), remove any debris from the module connector surfaces, and from the module connector gaskets. Verify that the gaskets are correctly installed. The gaskets prevent debris from contaminating the modules.
For any test that requires probing the PCM or probing a component harness connector, use the Connector Test Adapter Kit J 35616-A. Using this kit prevents damage to the component terminals and to the harness. Refer to Using Connector Test Adapters in Diagnostic Aids.
For an intermittent condition, refer to Intermittent Conditions. See: Symptoms\Intermittent Conditions
An intermittent may be caused by any of the following conditions:
Low system air flow may cause this DTC to set.
Excessive exhaust system back pressure
Moisture, water or debris ingested into the AIR pump
Pinched, kinked, heat damaged, or deteriorated hoses or vacuum lines
Restrictions in the pump inlet, duct, or filter
An AIR pump that has become inoperative and shows signs of exhaust gases in the outlet port would indicate a check valve failure.
Thoroughly check any circuitry that is suspected of causing the intermittent complaint. Refer to Testing for Intermittent and Poor Connections.
If a repair is necessary, refer to Wiring Repairs or Connector Repairs.
TEST DESCRIPTION
Steps 1-7
Steps 8-18
Steps 19-30
The numbers below refer to the step numbers on the diagnostic table.
If DTCs P0412 or P0418 are set, diagnose those DTCs first.
Inspects for excess resistance in all of the circuits that are associated with the AIR system.
This step tests for the battery voltage at the AIR pump relay.
This step tests for power to the AIR pump.
This step tests the ground circuit for the AIR pump.
This step tests for a grounded circuit between the AIR pump and the AIR pump relay.
A restriction in a hose or in a pipe, between the shut-off valve and the point where the system branches to each bank, causes the setting of this DTC. Inspect for kinks or for blockages from the AIR pump to the connection point where the AIR system divides.
A secondary air injection (AIR) pump is used on this vehicle in order to lower the tail pipe emissions during start-up. The powertrain control module (PCM) supplies a ground to the AIR pump relay, which energizes the AIR pump.
The PCM monitors the heated oxygen sensor (HO2S) voltages in order 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 monitors the short-term fuel trim values for both banks of the engine. If the AIR system is operating correctly, the HO2S voltages should be low, and the short-term fuel trim should be high.
If the PCM determines that the HO2S voltages for both banks did not respond with the expected results during the tests, DTC P0410 sets. If only 1 sensor responded, the PCM sets either DTC P1415 or DTC P1416. The active DTC indicates which bank has the inoperative AIR system.
CONDITIONS FOR RUNNING THE DTC
DTCs P0101-P0103, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0125, P0171-P0175, P0200, P0300, P0335, P0336, P0351-P0358, P0440, P0442, P0443, P0446, P0449, P1120, P1220, P1221, P1258, or P1441 are not set.
The fuel level is more than 12.5 percent but less than 87.5 percent .
The engine is running for more than 30 seconds .
The maximum air flow is 22 g/s .
The air fuel ratio is 13.125:1.
The engine load is less than 40 percent .
The ignition voltage is more than 11.7 volts .
Vehicle speed is more than 15 km/h (25 mph ).
The engine is not operating in any of the following modes:
Power enrichment
Decel fuel cut-off mode
The catalyst over temperature
The engine is operating in a closed loop for more than 15 seconds .
The engine speed is more than 850 RPM .
The engine coolant temperature (ECT) is between than -10°C to +110°C (14°F-230°F ).
The intake air temperature (IAT) is between -10°C to +100°C (14°F-212°F ).
The fuel system is operating in fuel trim cells 1,2,4,5, or 6.
CONDITIONS FOR SETTING THE DTC
If the AIR pump turns ON during a closed loop operation and the HO2S voltage does not fall below 222 mV for 1.3 seconds .
Or
If the AIR pump turns ON during a closed loop operation and the short-term fuel trim does not change more than a predetermined amount.
ACTION TAKEN WHEN THE DTC SETS
The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame/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
IMPORTANT:
Before you service the PCM or the throttle actuator control (TAC), remove any debris from the module connector surfaces, and from the module connector gaskets. Verify that the gaskets are correctly installed. The gaskets prevent debris from contaminating the modules.
For any test that requires probing the PCM or probing a component harness connector, use the Connector Test Adapter Kit J 35616-A. Using this kit prevents damage to the component terminals and to the harness. Refer to Using Connector Test Adapters in Diagnostic Aids.
For an intermittent condition, refer to Intermittent Conditions. See: Symptoms\Intermittent Conditions
An intermittent may be caused by any of the following conditions:
Low system air flow may cause this DTC to set.
Excessive exhaust system back pressure
Moisture, water or debris ingested into the AIR pump
Pinched, kinked, heat damaged, or deteriorated hoses or vacuum lines
Restrictions in the pump inlet, duct, or filter
An AIR pump that has become inoperative and shows signs of exhaust gases in the outlet port would indicate a check valve failure.
Thoroughly check any circuitry that is suspected of causing the intermittent complaint. Refer to Testing for Intermittent and Poor Connections.
If a repair is necessary, refer to Wiring Repairs or Connector Repairs.
TEST DESCRIPTION
Steps 1-7
Steps 8-18
Steps 19-30
The numbers below refer to the step numbers on the diagnostic table.
If DTCs P0412 or P0418 are set, diagnose those DTCs first.
Inspects for excess resistance in all of the circuits that are associated with the AIR system.
This step tests for the battery voltage at the AIR pump relay.
This step tests for power to the AIR pump.
This step tests the ground circuit for the AIR pump.
This step tests for a grounded circuit between the AIR pump and the AIR pump relay.
A restriction in a hose or in a pipe, between the shut-off valve and the point where the system branches to each bank, causes the setting of this DTC. Inspect for kinks or for blockages from the AIR pump to the connection point where the AIR system divides.
