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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1870 (Engine Controls And Fuel - 3.5L (L66) - DTC P2227 To DTC P2649) >> DTC P2413 >> Test Description

Test Description

WARNING: This page is about a different car, the 2007 Saturn Vue. 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. 5:  This step tests for high resistance in the reference voltage circuit. If the test lamp does not illuminates at all, there is excessive resistance in the 5-volt reference circuit or low reference ground circuit.
  2. 8:  This step tests for high resistance in the EGR solenoid control circuit and ground circuits. The PCM provides a 12 volt bias signal on the solenoid control circuit that is pulled low when the solenoid is OK and has a good ground. If the circuit resistance is OK, the DMM should measure ignition voltage.
  3. 18:  After replacing the PCM, a new minimum throttle position and idle speed must be established.
DTC P2413

Step Action Values Yes No
Connector End View Reference: Powertrain Control Module Connector End Views or Engine Controls Connector End Views
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle
2 Is DTC P0403 or P0406 also set? - Go to DTC P0403 or DTC P0406 Go to Step 3 
3
  1. Start the engine.
  2. Run the engine until the engine coolant temperature is at least 85°C (185°F).
  3. With the scan tool, command the exhaust gas recirculation (EGR) valve from 0 percent to 100 percent while observing the EGR Sensor data parameter. Refer to Scan Tool Output Controls .
Did the EGR Sensor voltage increase from the first specified value at 0 percent to more than the second specified value when at 100 percent?		 1.15 V
3.10 V		 Go to Step 4  Go to Step 6 
4 Command the EGR valve from 0 percent to 100 percent, while observing the idle speed and engine performance.
Did the idle speed decrease or did the engine run rough as the EGR was commanded to 100 percent?		 - Go to Step 5  Go to Step 8 
5 
  1. Observe the Freeze Frame/Failure Records data for this DTC.
  2. Turn OFF the ignition for 30 seconds.
  3. 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 3  Go to Intermittent Conditions
6
  1. Turn OFF the ignition.
  2. Disconnect the EGR valve electrical connector.
  3. Connect a DMM between the 5-volt reference circuit of the EGR position sensor and ground.
  4. Turn ON the ignition, with the engine OFF.
Is the voltage near the specified value?		 5 V Go to Step 7  Go to Step 12 
7
  1. Connect a 3-amp fused jumper wire between the 5-volt reference circuit of the EGR position sensor and the sensor signal circuit.
  2. Observe the EGR Sensor parameter on the scan tool.
Is the EGR sensor voltage within the specified range?		 4.8-5.2 V Go to Step 15  Go to Step 11 
8 
  1. Turn OFF the ignition.
  2. Disconnect the EGR valve electrical connector.
  3. At the EGR valve electrical connector, connect a DMM between the EGR solenoid control circuit and the EGR solenoid ground circuit.
  4. Turn ON the ignition, with the engine OFF.
Is the voltage at the specified value?		 B+ Go to Step 10  Go to Step 9 
9 Connect the DMM between the EGR solenoid control circuit and a known good ground.
Is the voltage at the specified value?		 B+ Go to Step 14  Go to Step 13 
10
  1. Connect a test lamp between the EGR solenoid control circuit and ground.
  2. With the scan tool, command the EGR valve from 0 percent to 100 percent while observing test lamp.
Did the test lamp illuminate fully at 100 percent?		 - Go to Step 17  Go to Step 18 
11 Test the EGR position sensor signal circuit for an open or a short to ground. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct a condition?		 - Go to Step 19  Go to Step 16 
12 Test the 5-volt reference circuit of the EGR position sensor for an open circuit. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 19  Go to Step 16 
13 Test the control circuit of the EGR valve for an open. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 19  Go to Step 16 
14 Repair the open in the ground circuit of the EGR valve. Refer to Wiring Repairs .
Did you complete the repair?		 - Go to Step 19  -
15 Test for an intermittent and for a poor connection at the EGR valve. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 19  Go to Step 17 
16 Test for an intermittent and for a poor connection at the powertrain control module (PCM). Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 19  Go to Step 18 
17 Replace the EGR valve. Refer to Exhaust Gas Recirculation Valve Replacement .
Did you complete the replacement?		 - Go to Step 19  -
18 
  1. Replace the PCM. Refer to Control Module References for replacement, setup, and programming.
  2. Perform the idle learn procedure. Refer to Idle Learn .
Did you complete the replacement?		 - Go to Step 19  -
19
  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 20 
20 Observe the Capture Info with a scan tool.
Are there any DTCs that have not been diagnosed?		 - Go to Diagnostic Trouble Code (DTC) List - Vehicle System OK
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