Powertrain Management (LUK)
DTC P0411 (LUK)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptor
DTC P0411
-
Secondary Air Injection System Incorrect Air Flow Detected
Circuit/System Description
The secondary air injection system aids in the reduction of hydrocarbon emissions during a cold start. The electric air pump forces fresh air into the exhaust stream in order to accelerate the catalyst operation. A pressure sensor is used to monitor the air flow from the secondary air injection pump. The ECM supplies voltage to the 5-volt reference circuit and supplies a ground to the low reference circuit. The sensor provides a signal voltage to the ECM relative to the pressure changes within the secondary air injection system.
Ignition voltage is supplied to the secondary air injection pump and air injection solenoid valve relays. The ECM controls the relays by grounding the control circuits, which activates the relays. When the relay contacts close, voltage is supplied to the pump and the solenoid valve, which turns the pump on and opens the solenoid valve.
The diagnostic uses 3 phases to test the secondary air injection system:
* DTCs P0411 and P2430 run during Phase 1
* DTCs P2430 and P2440 run during Phase 2
* DTC P2444 runs during Phase 3
During phase 1, both the secondary air injection pump and the secondary air injection solenoid valve are activated. Normal secondary air function occurs. Expected system pressure is 8-15 kPa (1.2-2.2 psi) above BARO.
During phase 2, only the secondary air injection pump is activated. The solenoid valve is closed. Pressure sensor performance and solenoid valve deactivation are tested. Expected system pressure is 15-22 kPa (2.2-3.2 psi) above BARO.
During phase 3, neither the secondary air injection pump nor the secondary air injection solenoid valve is activated. secondary air injection pump deactivation is tested. Expected system pressure equals BARO.
Conditions for Running the DTC
* DTCs P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0114, P0116, P0117, P0118, P0121, P0122, P0123, P0128, P0201, P0202, P0203, P0204, P0222, P0223, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0300, P0301, P0302, P0303, P0304, P0351, P0352, P0353, P0354, P0412, P0418, P0420, P0606, P0641, P0651, P1248, P1249, P124A, P124B, P2147, P2148, P2150, P2151, P2153, P2154, P2156, P2157, P2430, P2431, P2432 or P2433 are not set.
* The ignition voltage is between 10-32 V.
* The intake air temperature (IAT) is greater than -11°C (+12°F).
* The barometric pressure (BARO) is greater than 60 kPa (8.7 psi).
* The engine coolant temperature (ECT) is between -11 to +60°C (12-140°F).
* The manifold absolute pressure (MAP) sensor is greater than 20 kPa (2.9 psi).
* The engine speed is less than 5,000 RPM.
* The mass air flow (MAF) is less than 50 g/s.
* Greater than 60 min has elapsed since the last cold start.
* The Secondary Air Injection system is commanded ON.
* DTC P0411 runs once per trip at start up when the above conditions are met.
Conditions for Setting the DTC
* The ECM detects that the difference between the predicted system pressure and the actual system pressure is greater than 4.5 kPa (0.65 psi) or less than -7.5 kPa (-1.1 psi) for greater than 7 s.
OR
* The ECM detects that the average system pressure change is greater than a calibrated threshold for greater than 10 s.
Action Taken When the DTC Sets
DTC P0411 is a Type B DTC.
Conditions for Clearing the MIL/DTC
DTC P0411 is a Type B DTC.
Diagnostic Aids
A slow responding or skewed secondary air pressure sensor may cause this DTC to set.
Reference Information
Schematic Reference
Engine Controls Schematics (LEA) [1][2]Electrical DiagramsEngine Controls Schematics (LUK) [1][2]Electrical Diagrams
Connector End View Reference
Component Connector End Views Connector End Views By Name
Description and Operation
Secondary Air Injection System Description Description and Operation
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References Programming and Relearning for scan tool information
Circuit/System Verification
Note:
Verify the battery is fully charged before proceeding with this diagnostic procedure. The secondary air injection pump output will vary with system voltage.
1. Ignition ON
2. Verify that DTC P0412, P0418, P2430, P2431, P2432, P2433, P2440, or P2444 is not set.
• If any of the DTCs are set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle
• If none of the DTCs are set.
3. Verify the scan tool BARO pressure parameter is within the range specified in the Altitude Versus Barometric Pressure Altitude Versus Barometric Pressure
• If not within the specified range
Refer to DTC P0106 P0106
• If within the specified range
4. Verify the scan tool Secondary Air Injection Pressure Sensor and BARO pressure parameters are within 3 kPa (0.4 psi).
• If not within the specified range
Refer to DTC P2430-P2433 (LEA) Powertrain Management (LEA)DTC P2430-P2433 (LAF, LUK) Powertrain Management (LAF, LUK)
• If within the specified range
Note:
Repeat multiple times to verify secondary air injection solenoid valve operation.
5. Verify the secondary air injection solenoid valve activates when commanding the Secondary Air Injection Solenoid Valve ON and OFF with a scan tool.
• If the secondary air injection solenoid valve does not operate as specified
Refer to Circuit/System Testing-Secondary Air Injection Solenoid Valve Malfunction
• If the secondary air injection solenoid valve operates as specified
6. Engine running
7. Verify the secondary air injection pump turns ON and OFF when commanding the Secondary Air Injection Pump Relay ON and OFF with a scan tool.
• If the secondary air injection pump does not operate as specified
Refer to Circuit/System Testing-Secondary Air Injection Pump Malfunction
• If the secondary air injection pump operates as specified
8. Verify the scan tool Secondary Air Injection Pressure Sensor parameter increases between 15-22 kPa (2.2-3.2 psi), over the current reading, when the Secondary Air Injection Pump Relay is commanded ON with a scan tool.
• If not within the specified range
Refer to Circuit/System Testing-Secondary Air Injection System Pressure Not In Range.
• If within the specified range
9. Verify the scan tool Secondary Air Injection Pressure Sensor parameter increases between 8-15 kPa (1.2-2.2 psi), over the current reading, when the Secondary Air Injection System is commanded ON with a scan tool.
• If not within the specified range
Refer to Circuit/System Testing-Secondary Air Injection System Pressure Not In Range.
• If within the specified range
10. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
11. Verify the DTC does not set.
• If the DTC sets
Refer to Circuit/System Verification-step 1
• If the DTC does not set
12. All OK
Circuit/System Testing
Secondary Air Injection Solenoid Valve Malfunction
1. Ignition OFF, disconnect the KR26 secondary air injection solenoid valve relay.
2. Verify a test lamp illuminates between the B+ circuit terminal 30 and ground.
• If the test lamp does not illuminate and the circuit fuse is good
1. Test for less than 2 ohms in the B+ circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, verify the fuse is not open and there is voltage at the fuse.
• If the test lamp does not illuminate and the circuit fuse is open
1. Ignition OFF
2. Test for infinite resistance between the B+ circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
3. Disconnect the harness connector at the Q29 secondary air injection solenoid valve.
4. Test for infinite resistance between the control circuit terminal 5 and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
5. Test or replace the Q29 secondary air injection solenoid valve.
• If the test lamp illuminates
3. Disconnect the harness connector at the Q29 secondary air injection solenoid valve.
4. Ignition OFF and all vehicle systems OFF, it may take up to 2 minutes for all vehicle systems to power down. Test for less than 10 ohms between the Q29 secondary air injection solenoid valve ground circuit terminal 4 and ground.
• If 10 ohms or greater
1. Ignition OFF.
2. Test for less than 2 ohms in the ground circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.
• If less than 10 ohms
5. Connect the harness connector at the Q29 secondary air injection solenoid valve.
6. Connect a 15 A fused jumper wire between the B+ circuit terminal 30 and the control circuit terminal 87.
7. Verify the Q29 secondary air injection solenoid valve is activated.
• If the Q29 secondary air injection solenoid valve does not activate
1. Ignition OFF, disconnect the harness connector at the Q29 secondary air injection solenoid valve.
2. Test for less than 2 ohms in the control circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, test or replace the Q29 secondary air injection solenoid valve.
• If the Q29 secondary air injection solenoid valve activates
8. Test or replace the KR26 secondary air injection solenoid valve relay.
Secondary Air Injection Pump Malfunction
1. Ignition OFF, disconnect the KR25 secondary air injection pump relay.
2. Verify a test lamp illuminates between the B+ circuit terminal 87 and ground.
• If the test lamp does not illuminate and the circuit fuse is good
1. Ignition OFF
2. Test for less than 2 ohms in the B+ circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, verify the fuse is not open and there is voltage at the fuse.
• If the test lamp does not illuminate and the circuit fuse is open
1. Ignition OFF
2. Test for infinite resistance between the B+ circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
3. Disconnect the harness connector at the G21 secondary air injection pump.
Note:
The secondary air injection pump circuit is provided with a flyback diode that may cause the DTC to set if internally shorted.
4. Connect a DMM, set on the diode setting, between the control circuit terminal A and ground.
5. Verify the DMM reading is between 0.5-0.8 V and displays O.L. when the DMM leads are reversed.
• If less than the specified range, repair the short to ground on the circuit.
• If within the specified range
6. Test or replace the G21 secondary air injection pump.
• If the test lamp illuminates
3. Disconnect the harness connector at the G21 secondary air injection pump.
4. Ignition OFF and all vehicle systems OFF, it may take up to 2 minutes for all vehicle systems to power down. Test for less than 10 ohms between the G21 secondary air injection pump ground circuit terminal B and ground.
• If 10 ohms or greater
1. Ignition OFF.
2. Test for less than 2 ohms in the ground circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.
• If less than 10 ohms
5. Connect the harness connector at the G21 secondary air injection pump.
6. Connect a 50 A fused jumper wire between the B+ circuit terminal 87 and the control circuit terminal 30.
Note:
To prevent damage to the secondary air injection pump from overheating, do not continuously operate the pump for greater than 3 min.
7. Verify the G21 secondary air injection pump is activated.
• If the G21 secondary air injection pump does not activate
1. Ignition OFF, disconnect the harness connector at the G21 secondary air injection pump.
2. Test for less than 2 ohms in the control circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms,
3. Test or replace the G21 secondary air injection pump.
• If the G21 secondary air injection pump activates
8. Test or replace the KR25 secondary air injection pump relay.
Secondary Air Injection System Pressure Not In Range
1. Verify the following conditions do not exist:
* Hoses/pipes restricted or blocked
* Hoses/pipes disconnected
* Plugged secondary air injection pressure sensor port
* Damaged secondary air injection check valve
• If a condition is located
Repair or replace the affected component as necessary.
• If all components test normal
2. If a condition is not located, and the secondary air injection pump operates with no pressure change, replace the G21 secondary air injection pump.
Component Testing
Relay Test
1. Ignition OFF, disconnect the appropriate relay.
2. Test for the following resistance between terminals 85-86.
* 50-75 ohms-KR25 secondary air injection pump relay
* 70-110 ohms-KR26 secondary air injection solenoid valve relay
• If not within the specified range
Replace the relay.
• If within the specified range
3. Test for infinite resistance between the terminals listed below:
* 30 and 86
* 30 and 87
* 30 and 85
* 85 and 87
• If less than infinite resistance
Replace the relay.
• If infinite resistance
4. Install a 15 A fused jumper wire between relay terminal 85 and 12 V. Install a jumper wire between relay terminal 86 and ground.
5. Test for less than 2 ohms between terminals 30 and 87.
• If 2 ohms or greater
Replace the relay.
• If less than 2 ohms
6. All OK
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Relay Replacement (Within an Electrical Center) Relay Replacement (Within an Electrical Center)Relay Replacement (Attached to Wire Harness) Relay Replacement (Attached to Wire Harness)
* Secondary Air Injection Pipe Replacement Secondary Air Injection Pipe Replacement
* Secondary Air Injection Pump Inlet Hose Replacement Secondary Air Injection Pump Inlet Hose Replacement
* Secondary Air Injection Check Valve Replacement Secondary Air Injection Check Valve Replacement
* Secondary Air Injection Pump Replacement Service and Repair