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Test Description

The number below refers to the step number on the diagnostic table.

  1. 2:  This step determines if a condition exists. The EVAP canister purge valve is PWM. An audible click should be heard when the purge valve is commanded ON. Repeat the command as necessary.
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. Command the evaporative emission (EVAP) canister purge valve ON with a scan tool.
Do you hear an audible click from the EVAP canister purge valve?		 Go to Step 4  Go to Step 3 
3
  1. Turn OFF the ignition for 30 seconds.
  2. Start the engine.
  3. Operate the vehicle within the Conditions for Running the DTC.
Did the DTC fail this ignition?		 Go to Step 4  Go to Diagnostic Aids
4
  1. Turn OFF the ignition.
  2. Disconnect the evaporative emission (EVAP) canister purge valve harness connector.
  3. Turn ON the ignition, with the engine OFF.
  4. Connect a test lamp between the control circuit of the EVAP canister purge valve to a good ground.
Does the test lamp illuminate?		 Go to Step 7  Go to Step 5 
5 Connect a test lamp between the control circuit of the EVAP canister purge valve and the ignition 1 voltage circuit of the EVAP canister purge valve.
Does the test lamp illuminated?		 Go to Step 6  Go to Step 8 
6 Test the control circuit of the EVAP canister purge valve for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems
Did you find and correct the condition?		 Go to Step 12  Go to Step 11 
7
IMPORTANT: The control circuit for the EVAP canister purge valve is pulled-up to voltage within the ECM 3.9 volts on the control circuit is normal.
Test the control circuit of the EVAP canister purge valve for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.Did you find and correct the condition?		 Go to Step 12  Go to Step 9 
8 Test for shorted terminals and for poor connections at the EVAP canister purge valve. 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 12  Go to Step 10 
9 Test for shorted terminals and for poor connections 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 12  Go to Step 11 
10 Evaporative Emission Canister Purge Solenoid Valve Replacement
Did you complete the replacement?		 Go to Step 12  -
11 Replace the ECM. Refer to Engine Control Module Replacement .
Did you complete the replacement?		 Go to Step 12  -
12
  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 13 
13 Are there any DTCs that have not been diagnosed? Go to Diagnostic Trouble Code (DTC) List System OK
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