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Test Description

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

  1. 14:  This step determines if excessive resistance on the AIR pump supply circuit is the cause for an inoperative AIR pump. Two ohms of resistance on this circuit can prevent the AIR pump from running.
  2. 15:  This step determines if excessive resistance on the AIR pump ground circuit is the cause for an inoperative AIR pump. Two ohms of resistance on this circuit can prevent the AIR pump from running.
  3. 18:  This step determines if the AIR system is operating normally.
DTC P0410

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 Is DTC P0412 or DTC P0418 also set? - Go to Diagnostic Trouble Code (DTC) List Go to Step 3 
3
  1. Turn ON the ignition, with the engine OFF.
  2. Command the secondary air injection (AIR) pump relay ON and OFF with a scan tool.
  3. Listen for AIR pump operation.
Does the AIR pump turn ON and OFF with each command of the scan tool?		 - Go to Step 18  Go to Step 4 
4 Inspect the AIR pump fuse.
Is the AIR pump fuse open?		 - Go to Step 5  Go to Step 9 
5
  1. Turn OFF the ignition.
  2. Disconnect the AIR pump connector.
  3. Connect a test lamp between the AIR pump supply voltage circuit and the ground circuit of the AIR pump at the harness connector.
  4. Replace the AIR pump fuse.
  5. Command the AIR pump relay ON and OFF with a scan tool.
Does the test lamp turn ON and OFF with each command of the scan tool?		 - Go to Step 8  Go to Step 6 
6 Does the test lamp remain illuminated when the air pump relay is commanded ON and OFF with a scan tool? - Go to Step 7  Go to Step 34 
7
  1. Remove the AIR pump relay.
  2. Turn ON the ignition, with the engine OFF.
Does the test lamp remain illuminated?		 - Go to Step 33  Go to Step 39 
8
  1. Connect the AIR pump connector.
  2. Replace the AIR pump fuse as necessary.
  3. Command the AIR pump relay ON and OFF with a scan tool.
  4. Listen for AIR pump operation.
Does the AIR pump turn ON?		 - Go to Intermittent Conditions Go to Step 41 
9
  1. Remove the AIR pump relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems.
  2. Inspect the AIR pump relay for an intermittent and for a poor connection at the AIR pump relay underhood fuse block. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 42  Go to Step 10 
10 Connect a 30-ampJ 36169-A  Fused Jumper Wire between the battery positive circuit and the AIR pump supply voltage circuit at the AIR pump relay connector. Refer to Using Fused Jumper Wires in Wiring Systems.
Does the AIR pump turn ON?		 - Go to Step 16  Go to Step 11 
11 Test the battery positive voltage circuit between the AIR pump fuse and AIR pump relay for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 42  Go to Step 12 
12
  1. Ensure the 30-amp J 36169-A  is connected at the underhood fuse block.
  2. Disconnect the AIR pump connector.
  3. Probe the AIR pump supply voltage circuit at the AIR pump harness connector with a test lamp that is connected to a good ground. Refer to Probing Electrical Connectors in Wiring Systems.
Does the test lamp illuminate?		 - Go to Step 13  Go to Step 35 
13 Probe the ground circuit of the AIR pump harness connector with a test lamp that is connected to a battery voltage. Refer to Probing Electrical Connectors in Wiring Systems.
Does the test lamp illuminate?		 - Go to Step 14  Go to Step 36 
14 
  1. Connect a jumper wire between each of the terminals in the AIR pump harness connector and the corresponding terminal at the AIR pump. Refer to Using Connector Test Adapters in Wiring Systems.
  2. Ensure the 30-amp J 36169-A  is connected at the underhood fuse block.
  3. Measure the voltage drop from the AIR pump supply voltage circuit at the AIR pump connector to the AIR pump supply voltage circuit at the AIR pump relay with a DMM. Refer to Measuring Voltage Drop and Circuit Testing in Wiring Systems.
Is the voltage drop less than the specified value?		 0.6 V Go to Step 15  Go to Step 35 
15  Measure the voltage drop from the AIR pump ground circuit at the AIR pump harness connector to a good ground with a DMM. Refer to Circuit Testing and Measuring Voltage Drop in Wiring Systems.
Is the voltage drop less than the specified value?		 0.6 V Go to Step 17  Go to Step 36 
16 Measure the resistance of the AIR pump relay control circuit between the powertrain control module (PCM) and the AIR pump relay with a DMM. Refer to Circuit Testing in Wiring Systems.
Is the resistance less than the specified value?		 15 Ω Go to Step 17  Go to Step 37 
17
IMPORTANT: The DMM and test leads must be calibrated to 0 ohms in order to prevent misdiagnosis. Refer to the DMM User Manual for calibration procedure.
  1. With the AIR pump relay removed from the vehicle, energize the relay with a 12-volt power and ground source.
  2. Measure the resistance at the relay switch circuit with a DMM.
Is the resistance within the specified range?		 1-3 Ω Go to Step 27  Go to Step 39 
18 
  1. Start and idle the engine.
  2. Monitor the HO2S bank 1 sensor 1 and bank 2 sensor 1 voltage parameters.
  3. Command the AIR pump system ON with a scan tool.
Do both of the HO2S voltage parameters decrease to the specified value within 20 seconds?		 75 mV Go to Diagnostic Aids Go to Step 19 
19
  1. Turn OFF the ignition.
  2. Disconnect the AIR shut-off valve outlet hose at the in-line connector beside the generator.
  3. Turn ON the ignition, with the engine OFF.
  4. Command the AIR pump relay ON with a scan tool.
Is a pressurized airflow present at the AIR pump shut-off valve outlet hose?		 - Go to Step 31  Go to Step 20 
20
  1. Connect the AIR shut-off valve outlet hose at the in-line connector.
  2. Disconnect the AIR shut-off valve from the AIR pump outlet hose. Refer to Secondary Air Injection (AIR) Shut-Off Valve Replacement .
  3. Command the AIR pump relay ON with a scan tool.
Is a pressurized airflow present at the AIR pump outlet hose?		 - Go to Step 21  Go to Step 29 
21
  1. Turn OFF the ignition.
  2. Remove the vacuum hose from the AIR shut-off valve.
  3. Connect a vacuum gage to the hose.
  4. Start and idle the engine.
  5. Command the AIR solenoid ON with a scan tool.
Is the vacuum displayed on the gage above the specified value?		 10 in Hg (254 mm) Go to Step 22  Go to Step 24 
22
  1. Turn OFF the ignition.
  2. Connect a vacuum pump to the AIR shut-off valve.
  3. Apply 10 inches Hg (254 mm) of vacuum to the AIR shut-off valve.
Does the AIR shut-off valve hold vacuum for the specified amount of time?		 30 seconds Go to Step 23  Go to Step 38 
23 Inspect for a restriction or for a blockage in the AIR shut-off valve.
Did you find and correct the condition?		 - Go to Step 43  Go to Step 30 
24
  1. Turn OFF the ignition.
  2. Disconnect the vacuum supply hose from the inlet of the AIR solenoid. Refer to Secondary Air Injection (AIR) Vacuum Control Solenoid Valve Replacement .
  3. Install a vacuum gage to the hose.
  4. Start and idle the engine.
Is the vacuum displayed on the gage above the specified amount?		 10 in Hg (254 mm) Go to Step 25  Go to Step 32 
25 Measure the resistance of the AIR solenoid control circuit between the PCM and the AIR solenoid with a DMM. Refer to Circuit Testing in Wiring Systems.
Is the resistance less than the specified value?		 15 Ω Go to Step 26  Go to Step 37 
26 Measure the resistance of the AIR solenoid ignition 1 voltage circuit between the ENG IGN 1 fuse and the AIR solenoid with a DMM. Refer to Circuit Testing in Wiring Systems.
Is the resistance less than the specified value?		 15 Ω Go to Step 28  Go to Step 37 
27 Test for an intermittent and for a poor connection at the AIR pump. Refer toTesting for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 42  Go to Step 41 
28 Inspect the vacuum hose between the AIR shut-off valve and AIR solenoid for a leak or restriction.
Did you find and correct a condition?		 - Go to Step 43  Go to Step 40 
29 Inspect for a restriction in one of the following components:
Did you find and correct a condition?		 - Go to Step 43  Go to Step 41 
30 Repair the restriction or leak in the AIR shut-off valve outlet hose between the AIR shut-off valve and the crossover pipe.
Did you complete the repair?		 - Go to Step 43  -
31
CAUTION: Refer to Hot Exhaust System Caution in Cautions and Notices.
Repair the restriction in one of the following components:Did you complete the repair?		 - Go to Step 43  -
32 Repair the restriction or leak in one of the following components:
  • The vacuum hose, from the intake manifold to the AIR solenoid
  • The vacuum check valve
  • The intake manifold vacuum port

Did you complete the repair?		 - Go to Step 43  -
33
  1. Repair the short to voltage in the AIR pump supply voltage circuit. Refer to Wiring Repairs in Wiring Systems.
  2. Replace the AIR pump fuse as necessary.
Did you complete the repair?		 - Go to Step 42  -
34
  1. Repair the short to ground in the AIR pump supply voltage circuit. Refer to Wiring Repairs in Wiring Systems.
  2. Replace the AIR pump fuse as necessary.
Did you complete the repair?		 - Go to Step 43  -
35 Repair the open or high resistance in the AIR pump supply voltage circuit. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?		 - Go to Step 43  -
36 Repair the open or high resistance in the AIR pump ground circuit. Refer toWiring Repairs in Wiring Systems.
Did you complete the repair?		 - Go to Step 43  -
37 Repair the circuit with the high resistance. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?		 - Go to Step 43  -
38 Replace the AIR shut-off valve. Refer to Secondary Air Injection (AIR) Shut-Off Valve Replacement .
Did you complete the replacement?		 - Go to Step 43  -
39 Replace the AIR pump relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems.
Did you complete the replacement?		 - Go to Step 42  -
40 Replace the AIR Solenoid. Refer to Secondary Air Injection (AIR) Vacuum Control Solenoid Valve Replacement .
Did you complete the replacement?		 - Go to Step 43  -
41
  1. Replace the AIR pump. Refer to Secondary Air Injection (AIR) Pump Replacement .
  2. Replace the AIR pump fuse as necessary.
Did you complete the replacement?		 - Go to Step 42  -
42
  1. Ensure all components are installed and secured.
  2. Ensure the AIR pump is connected.
  3. Command the AIR pump relay ON and OFF with a scan tool.
Does the AIR pump relay turn ON and OFF when commanded with a scan tool?		 - Go to Step 43  Go to Step 2 
43
  1. Clear the DTCs with a scan tool.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. 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.
Did the DTC fail this ignition?		 - Go to Step 2  Go to Step 44 
44 Observe the Capture Info with a scan tool.
Are there any DTCs that have not been diagnosed?		 - Go to Diagnostic Trouble Code (DTC) List System OK
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