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2010 chevrolet p0449 evaporative emission control system vent valve

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2004 Chevrolet Chevy K Silverado – 4WD Evaporative Emission (EVAP) Canister Vent Solenoid Valve Replacement Pickup

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Evaporative Emission (EVAP) Canister Vent Solenoid Valve Replacement Pickup Removal Procedure Important Clean the evaporative emission (EVAP) connections and surrounding areas prior to disconnecting the fittings in order to avoid possible system contamination. 1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information. 2. Remove the harness clip from the canister vent solenoid (CVS) line. 3. Disconnect the CVS electrical connector. 2004 Chevrolet Chevy K Silverado – 4WD 4. If the vehicle is equipped with a 6 ft box, disconnect the EVAP CVS line from the canister. 5. Remove the CVS clip from the frame crossmember. 6. Push in the retainer and remove the CVS from the fuel tank clip. 7. If the vehicle is equipped with a 8 ft box, disconnect the EVAP CVS line from the canister. 8. Remove the CVS clip from the frame crossmember. 9. Push in the retainer and remove the CVS from the fuel tank clip. Installation Procedure 1. If the vehicle is equipped with a 8 ft box, install the CVS to the fuel tank until the clip engages. Important On vehicles equipped with a 8 ft box, the CVS line is routed below the frame crossmember. 2. Install the CVS clip to the frame crossmember. 3. Connect the EVAP CVS line to the canister. 4. If the vehicle is equipped with a 6 ft box, install the CVS to the fuel tank until the clip engages. Important On vehicles equipped with a 6 ft box, the CVS line is routed above the frame crossmember. 5. Install the CVS clip to the frame crossmember. 6. Connect the EVAP CVS line to the canister. 7. Connect the CVS electrical connector. 8. Install the harness clip to the canister vent solenoid (CVS) line. 9. Lower the vehicle.

1984-1998 Jeep Wagoneer/ Commando/ Cherokee Emission Controls Crankcase Ventilation System (PCV/CCV)

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CCV Fitting See Figures 2 and 3 1. With the engine running, remove the CCV fitting. a. If the fitting is not plugged, a hissing noise will be heard as air passes through the valve. A strong vacuum should also be felt when a finger is placed over the fitting. b. Install the CCV fitting. c. Remove the fresh air hose from the air cleaner assembly and loosely hold a piece of paper over the open end of the hose. After allowing about one minute for the crankcase pressure to reduce, the paper should be sucked against the opening with a noticeable amount of force. 2. Turn the engine OFF . Remove the metered orifice fitting, and check for a plugged condition. A clicking noise should be heard to indicate that the valve mechanism is free. 3. If the crankcase ventilation system meets the tests in Steps 1 and 2 above, no further service is required. If not, the CCV fitting must be cleaned and the system checked again. 4. If Step 1c fails when the CCV fitting is cleaned, it will be necessary to replace the molded vacuum hose with a new one, and to clean the metered orifice port. 5. Clean or replace the engine air cleaner filter element with a new one-for more details, refer to the air cleaner procedure located in General Information & Maintenance. Fig. 2: CCV system diagram for 4.0L engine Fig. 3: CCV system diagram for the 2.5L engine Evaporative Emission Control System OPERATION The evaporative emission control system prevents the release of unburned hydrocarbons, from gasoline or gasoline vapor, into the atmosphere. When pressure in the fuel tank is below 3 psi (20 kPa), the pressure relief/rollover valves open allowing fuel vapors to flow to the evaporative canister where they are absorbed by a charcoal mixture. This prevents excessive pressure buildup in the fuel system. Most canisters are equipped with a calibrated orifice at the inlet to the canister.

Test Guidelines for Use of Essential Tool J 41413-200 Evaporative System Tester

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Non-Enhanced EVAP System Diagnostic Procedure 1. Pinch off or plug the EVAP vapor line to seal the EVAP system. 2. Connect the EEST red battery clip to the positive (+) battery terminal. Connect the black battery clip to chassis ground. 3. Install the appropriate fuel fill cap adapter to the fuel fill pipe. Refer to the Service Information for the appropriate fuel fill cap adapter part number. 4. Connect the EEST’s nitrogen/smoke supply hose and vehicle fuel fill cap to the adapter. 5. Turn the nitrogen/smoke valve on the EEST control panel to SMOKE. 6. Use the remote switch to introduce smoke into the EVAP system for 60 seconds. Important: Additional smoke may need to be introduced at 15-second intervals until the leak source has been located. 7. Inspect the entire EVAP system for exiting smoke using the high intensity white light (J 41413-SPT). Enhanced EVAP System Leak Detection Procedure When diagnosing DTCs P0440, P0442, P0446 and P0455, use the J 41413-200 EEST along with 1. Turn ON the ignition with the engine OFF. 2. Command the EVAP vent valve closed with a scan tool.* *Prizm: In order to seal the EVAP system on the 1998-2002 Prizm, bypass the EVAP canister by connecting the fuel tank vapor hose to the canister purge line. Refer to the Service Information for additional information. 3. Connect the EEST red battery clip to the positive (+) battery terminal. Connect the black battery clip to chassis ground. 4. Install the appropriate fuel fill cap adapter to the fuel fill pipe. Refer to the Service Information for the appropriate fuel fill cap adapter part number. 5. Connect the EEST’s nitrogen/smoke supply hose and vehicle fuel fill cap to the adapter. 6. Turn the nitrogen/smoke valve on the EEST control panel to SMOKE. 7. Use the remote switch to introduce smoke into the EVAP system. 8. Use the J 41413-VLV EVAP Port Vent Fitting tool to open the EVAP service port (if equipped) until smoke is observed. 9. Remove the J 41413-VLV EVAP Port Vent Fitting tool once smoke is observed. Important: Additional smoke may need to be introduced at 15-second intervals until the leak source has been located.

DTC P0446 (Restricted/Blocked EVAP Vent Path) Set, Check Engine Light On (Replace Evaporative Emission (EVAP) Vent Valve Solenoid Assembly and Add/Relocate Filter Box Using Service Kit)

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Tighten Tighten the bracket mounting bolt to 12 N?m (106 lb in). Connect the vent valve pipe to the EVAP canister. • Install the two vent valve pipe clips into the existing underbody holes. • Connect the EVAP canister vent valve electrical connector, if equipped. • Attach bulk 5/8″ heater hose to the vent valve port and secure using a clamp. Run a length as needed along the frame rail routing to the area above the transmission. • Cut the hose to determined length and install the supplied filter box. Secure using a clamp. • Remove the transmission support and lower the transmission assembly as necessary to allow for access to the new filter box location using a tie strap. DO NOT pinch or restrict the transmission vent hose. The filter box opening should be pointing downward. • Raise the transmission and reinstall the transmission support. • Tie strap the hose as needed along the frame rail in order to keep the hose away from pinch*points and heat sources. • Lower the vehicle. • 2004-2007 Model Year (Use Service Kit P/N 19152349) Raise the vehicle. Suitably support the vehicle. • Disconnect the EVAP canister vent valve electrical connector. • Disconnect the canister pipe from the vent valve. • Push in the retainer and remove the existing canister vent valve from the fuel tank clip or mounting bracket. Discard the old valve. • Cut back the existing canister pipe approximately 51 mm (2 in) to remove the quick connect end. Crew Cab Short Box Shown Below, Other Configurations Similar Extended Cab Short Box Shown Below, Other Configurations Similar Install the new canister vent valve to the fuel tank clip or mounting bracket. • Cut bulk 5/8″ heater hose to a length of approximately 76 mm (3 in). Install the hose between the vent valve and the canister pipe and secure using clamps. • Attach bulk 5/8″ heater hose to the vent valve port and secure using a clamp. Run a length as needed along the frame rail routing to the area above the transmission. • Cut the hose to determined length and install the supplied filter box. Secure using a clamp. •

2005 Ford F-Super Duty 250-550 Auxiliary Brake System/ Trailer Brake Control (TBC) Module Repair Manual

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connected to the vehicle, the TBC module will enter a “sleep mode” but still continue to send a PWM voltage signal to the trailer tow connector every 4 seconds to detect when a trailer is connected. When the ignition key is in the RUN position and the module is in sleep mode, pressing a gain button or sliding the manual switch will cause the module to “wake up”. If a trailer is not connected to the vehicle, the display should prove out for 3 seconds, then the trailer icon should illuminate red and the IC message center should display TRAILER DISCONNECTED or CHECK TRAILER. If a trailer is connected to the vehicle, the display should prove out for 3 seconds and then the trailer icon should illuminate green. Inspection and Verification NOTE: A trailer brake emulator tool is available to verify that the TBC module and vehicle wiring are functioning correctly. 1. Verify the TBC system is correctly installed by checking that the vehicle is equipped with a brake pressure transducer on the master cylinder. If the brake pressure transducer is not present, then the TBC system has been erroneously installed. 2. Verify the customer concern. 3. NOTE: The TBC does not function with electric-over-hydraulic or surge trailer brake types. Verify that the trailer brakes are electric-actuated drum type brakes. 4. Verify the stoplamps operate correctly by applying and releasing the brake pedal with the ignition switch in the OFF position and the trailer disconnected. If the stoplamps do not operate correctly, refer to Section 417-01 . If the stoplamps operate correctly, proceed to the next step. 5. Visually inspect for obvious signs of mechanical or electrical damage. Visual Inspection Chart 6. If the cause is not visually evident, connect the scan tool to the data link connector (DLC) and select the vehicle to be tested from the scan tool menu. If the scan tool does not communicate with the vehicle: * check that the program card is correctly installed. * check the connections to the vehicle. * check the ignition switch position. 7. If the scan tool still does not communicate with the vehicle, refer to the scan tool operating manual. 8. Carry out the scan tool data link test. If the scan tool responds with: * CAN, ISO, or UBP circuit fault; all electronic control units no response/not equipped, refer to Section 418-00 . * No response/not equipped for the TBC, GO to Pinpoint Test A . * System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs, and carry out self-test diagnostics for the TBC and the antilock brake system (ABS) module. 9. If the DTCs retrieved are related to the concern, go to the Trailer Brake Control (TBC) module Diagnostic Trouble Code (DTC) Chart or Anti-Lock Brake System (ABS) Module Diagnostic Trouble Code (DTC) Chart to continue diagnosis. 10. If no DTCs related to the concern are retrieved, GO to Symptom Chart to continue diagnosis. NOTE: Always retrieve the continuous DTCs after running the self-test.