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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Control System Self-Diagnostics - 5.7L) >> Diagnostic Tests >> DTC P0449: EVAP Canister Vent Solenoid Valve Control Circuit >> Diagnostic Procedures

Diagnostic Procedures

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  1. If powertrain diagnostic system check was performed, go to next step. If powertrain diagnostic system check was not performed, go to POWERTRAIN DIAGNOSTIC SYSTEM CHECK  under DIAGNOSTIC SYSTEM TESTS. After performing powertrain diagnostic system check, go to next step.
  2. Raise and support vehicle. Locate and place your hand on EVAP canister vent solenoid. See Figure. Using scan tool, command solenoid on and off. If solenoid turns on and off as commanded, go to next step. If solenoid does not turn on or off when commanded, go to step  4.
  3. Using scan tool, review FREEZE FRAME and/or FAILURE RECORDS data for this DTC. Turn ignition off for at least 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 engine off if necessary. Turn ignition on. Raise and support vehicle. Disconnect fuel tank connector C405 "D" at body pass-through connector C405 "B". Connector C405 is located in front of rear axle. Connect test light between ground and C405 "B" connector terminal 2A (Pink wire). See Figure. If test light illuminates, go to next step. If test light does not illuminate, go to step  13.
  5. Connect test light between C405 "B" connector terminal 2A (Pink wire) and 2B (White wire). Using scan tool, command EVAP canister vent solenoid on and off. If test light turns on and off with each command, go to step  9. If test light does not turn on and off with each command, go to next step.
  6. If test light remains illuminated with each command, go to step  8. If test light does remain illuminated with each command, go to next step.
  7. Check for short to voltage or open in Pink wire between connector C405 located in front of rear axle and splice S182 located in headlight harness approximately 5 in. from harness breakout to bottom underhood fuse block. Repair as necessary. After repairs, go to step  16. If circuit is okay, go to step  12.
  8. Check for short to ground in Pink wire between connector C405 located in front of rear axle and splice S182 located in headlight harness approximately 5 in. from harness breakout to bottom underhood fuse block. Repair as necessary. After repairs, go to step  16. If circuit is okay, go to step  12.
  9. Check for poor connections at C405 "B" and C405 "D" connectors. Repair as necessary. After repairs, go to step  16. If connections are okay, go to next step.
  10. Remove fuel tank and disconnect EVAP canister vent valve connector. See REMOVAL, OVERHAUL & INSTALLATION - CARS article. Check for damaged EVAP canister vet valve wiring. Repair as necessary. After repairs, go to step  16. If circuit is okay, go to next step.
  11. Check for poor connections at EVAP canister vent valve. Repair as necessary. After repairs, go to step  16. If connections are okay, go to step  14.
  12. Check for poor connections at PCM. Repair as necessary. After repairs, go to step  16. If connections are okay, go to step  15.
  13. Repair open or short to ground in Pink wire between connector C405 located in front of rear axle and splice S182 located in headlight harness approximately 5" from harness breakout to bottom underhood fuse block. After repairs, go to step  16.
  14. Replace EVAP canister vent valve. See REMOVAL, OVERHAUL & INSTALLATION - CARS article. After repairs, go to step  16.
  15. Replace PCM. See REMOVAL, OVERHAUL & INSTALLATION - CARS article. After repairs, go to next step.
  16. Using scan tool, clear DTCs. Turn ignition off for at least 30 seconds. Start engine and allow it to reach normal operating temperature. 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, go to step  2.
  17. Using scan tool, select CAPTURE INFO, REVIEW INFO function. If any undiagnosed DTCs are displayed, go to applicable DTC test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no undiagnosed DTCs are displayed, system is okay.
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