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Test Description

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

  1. 2:  A click should be heard or felt when the valve operates. Ensure that both the ON and the OFF states are commanded. Repeat the commands as necessary.
  2. 4:  This step tests if the EGR solenoid ignition 1 voltage circuit has a fault. A fault in the main relay, fuse, or underhood bussed electrical center (UBEC) can cause multiply DTC's to set and a no start condition.
  3. 5:  This step verifies that the ECM is providing ground to the EGR solenoid.
  4. 6:  This step tests if the EGR solenoid control circuit is grounded.
Step Action Yes No
Schematic Reference:  Engine Controls Schematics 
Connect End View Reference:  Engine Controls Connector End Views 
1 Did you perform the Diagnostic System Check - Engine Controls? Go to Step 2  Go to Diagnostic System Check - Engine Controls
2 
  1. Turn ON the ignition, with the engine OFF.
  2. With the scan tool, command the EGR solenoid ON and OFF.
Do you hear or feel a click from the EGR solenoid when the valve is commanded ON and OFF?		 Go to Step 3  Go to Step 4 
3
  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.
Did the DTC fail this ignition?		 Go to Step 4  Go to Intermittent Conditions
4 
  1. Disconnect the EGR solenoid electrical connector.
  2. Probe the ignition 1 voltage circuit of the EGR solenoid with a test lamp connected to a good ground.
Does the test lamp illuminate?		 Go to Step 5  Go to Step 11 
5 
  1. Connect a test lamp between the control circuit of the EGR solenoid and the ignition 1 voltage circuit of the EGR solenoid.
  2. With a scan tool, command the EGR solenoid ON and OFF.
Does the test lamp turn ON and OFF with each command?		 Go to Step 9  Go to Step 6 
6  Does the test lamp remain illuminated with each command? Go to Step 8  Go to Step 7 
7 Test the control circuit of the EGR solenoid for an open or for high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 14  Go to Step 10 
8 Test the control circuit of the EGR solenoid for a short to ground. Refer to Testing for Short to Ground and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 14  Go to Step 10 
9 Test for an intermittent and for a poor connection at the EGR solenoid. 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 14  Go to Step 12 
10 Test for an intermittent and for a poor connection at the ECM. 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 14  Go to Step 13 
11
  1. Repair the ignition 1 voltage circuit of the EGR solenoid for one of the following conditions:
    • An open
    • A short to ground
    • High resistance
  2. Replace the fuse as necessary. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you complete the repair?		 Go to Step 14  -
12 Replace the EGR valve. Refer to Exhaust Gas Recirculation Valve Replacement .
Did you complete the replacement?		 Go to Step 14  -
13 Replace the ECM. Refer to Engine Control Module Replacement .
Did you complete the replacement?		 Go to Step 14  -
14
  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.
Did the DTC fail this ignition?		 Go to Step 2  Go to Step 15 
15 Are there any DTCs that have not been diagnosed? Go to Diagnostic Trouble Code (DTC) List System OK
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