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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 7 (Engine Control System Self-Diagnostics - 5.7L) >> Diagnostic Tests >> DTC P0443: Evaporative Emission (EVAP) Purge Solenoid Control Circuit >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different car, the 2000 Pontiac Firebird, 2000 Chevrolet Corvette, and 2000 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing OBD system check, go to next step.
  2. Warm engine to normal operating temperature. Operate engine at idle. Using scan tool, command EVAP solenoid to 50 percent and then to zero percent. If solenoid responds as commanded, go to next step. If solenoid does not respond as commanded, go to step  4.
  3. Using scan tool, review FREEZE FRAME and/or FAILURE RECORDS data for this DTC. Turn ignition off for 30 seconds. Start engine. Operate vehicle within the conditions for setting this DTC. Check DTCs. If this DTC resets, go to next step. If DTC does not reset, see DIAGNOSTIC AIDS .
  4. Turn ignition off. Disconnect EVAP purge solenoid. Turn ignition on, with engine off. Using a test light connected to ground, probe coil side feed circuit of EVAP purge solenoid. If test light illuminates, go to next step. If test light does not illuminate, go to step  11.
  5. Connect test light between control and coil side feed circuit of EVAP purge solenoid. Using scan tool, command EVAP purge solenoid to 50 percent and then to zero percent. If test light responds to each command, go to step  9. If test light does not respond to each command, go to next step.
  6. If test light remains illuminated with each command, go to step  8. If test light does not remain illuminated with each command, go to next step.
  7. Check control circuit of EVAP purge solenoid for short to voltage or open circuit. Repair as necessary. After repairs, go to step  14. If circuit is okay, go to step  10.
  8. Check control circuit of EVAP purge solenoid for short to ground. Repair as necessary. After repairs, go to step  14. If circuit is okay, go to step  13.
  9. Check for poor connections at solenoid. Repair as necessary. After repairs, go to step  14. If connections are okay, go to step 12.
  10. Check for poor connections at PCM. Repair as necessary. After repairs, go to step  14. If connections are okay, go to step  13.
  11. Repair coil side feed circuit of EVAP purge solenoid. After repairs, go to step  14.
  12. Replace solenoid. After replacing solenoid, go to step 14.
  13. Replace PCM. Program replacement PCM using required equipment. After replacing PCM, go to next step.
  14. Using scan tool, select DTC, CLEAR INFO function. Start and warm engine to normal operating temperature. Select DTC, SPECIFIC, then enter this DTC. Operate vehicle within conditions for setting this DTC. If scan tool indicates that this test ran and passed, go to next step. If scan tool does not indicate that this test ran and passed, repeat step  2.
  15. Using scan tool, select CAPTURE INFO, REVIEW INFO function. If any undiagnosed DTCs are displayed, go to applicable DTC test.
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