03 blazer evap system diagram


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2004 Honda Accord EVAP Canister Vent Shut Valve Stuck Closed Malfunction

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Filed Under (Honda) by admin on 05-11-2010

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1. 2. 3. 4. Turn the ignition switch ON (II). Clear the DTC with the HDS. Remove the fuel fill cap for 5 seconds , then install it. Start the engine. Hold the engine speed at 3,000 rpm with no load (in Park or neutral) until the radiator fan comes on, then let it idle. Monitor the OBD STATUS for DTC P2422 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES – Go to step 6. NO – If the screen indicates PASSED, intermittent failure, system is OK at this time. Check for a poor connection or loose terminals at the EVAP canister vent shut valve and ECM/PCM. If the screen indicates NOT COMPLETED, go to step 2 and recheck. Clear the DTC with the HDS. Remove the EVAP canister vent shut valve from the EVAP canister. Connect the 2P connector to the EVAP canister vent shut valve. Turn the ignition switch ON (II). Do the EVAP CVS ON in the INSPECTION MENU with the HDS. 5. 6. 7. 8. 9. 10. 11. Check the EVAP canister vent shut valve (A) operation. Does the valve operate? YES – Check for a blockage in the EVAP canister, then install the EVAP canister vent shut valve, and go to step 14. NO – Go to step 12. 12. Turn the ignition switch OFF. 13. Replace the EVAP canister vent shut valve. 14. Turn the ignition switch ON (II). 15. Reset the ECM/PCM with the HDS. 16. Do the ECM/PCM idle learn procedure. 17. Turn the ignition switch OFF. 18. Remove the fuel fill cap for 5 seconds , then install it. 19. Start the engine. Hold the engine speed at 3,000 rpm with no load (in Park or neutral) until the radiator fan comes on, then let it idle. 20. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES – If DTC P2422 is indicated, check for poor connections or loose terminals at the FTP sensor or the EVAP canister vent shut valve and the ECM/PCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC’s troubleshooting. NO – Go to step 21. 21. Monitor the OBD STATUS for DTC P2422 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES – Troubleshooting is complete. NO – If the screen indicates FAILED, check for poor connections or loose terminals at the FTP sensor or the EVAP canister vent shut valve and the ECM/PCM, then go to step 1. If the screen indicates NOT COMPLETED, go to step 16 and recheck.

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2005 – 2007 Nissan PATHFINDER EVAP Vent Control S/V is stuck open or will not seal when operated/closed

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Filed Under (Nissan) by admin on 28-11-2010

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IF YOU CONFIRM: A MIL “ON” with one or more of the following DTC(s) stored: • P0442 / P0448 / P0455 / P0456 / P1446 AND • EVAP Vent Control S/V is stuck open or will not seal when operated/closed. ACTIONS: 1. Replace the EVAP Vent Control S/V. 2. Install the Filter Kit (refer to the Service Procedure in this bulletin). 3. Clear any DTCs stored in the ECM. SERVICE PROCEDURE Replace Vent Control Valve 1. Replace the EVAP Vent Control S/V. • Refer to section EC in the Service Manual for replacement information. Install Filter Kit 1. Remove the spare tire. 2. Remove the EVAP canister mounting bolt (see Figure 1). • The canister will drop about 3 inches which will give you working room at the top. 3. Disconnect the vent hose (see Figure 1). 4. Reach above the EVAP canister and disconnect the vent hose at the vent control valve and remove the hose (see Figure 2). • Twisting the hose at the opposite end will help loosen it at the vent control valve. 5. Remove the vent hose connector; pull it straight out (see Figure 2). 6. Install the new vent hose connector—included in the filter kit (see Figure 3). 7. Cut out the template on page 10 and place it on the frame rail as shown in Figure 4. • Make sure the template is aligned (straight) with the frame rail. 8. Center punch and drill at the locations shown in Figure 4: • Upper location: Drill a 13/32 (10 mm) hole. • Lower location: Drill a 5/16 (8 mm) hole. Center punch and drill here: 13/32 (10 mm)

2000 Buick LeSabre Canister REMOVAL PROCEDURE

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Filed Under (Buick) by admin on 25-07-2010

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REMOVAL PROCEDURE CAUTION: Refer to Hoist Caution in Service Precautions. 1. Raise the vehicle. Refer to Vehicle Lifting. 2. Mark the hoses for installation on the EVAP canister. 3. Remove the EVAP vent hose (1). 4. Remove the fuel tank vapor hose (2). 5. Remove the purge hose (3). 6. Remove the nuts (2) from the EVAP canister. 7. Remove the EVAP canister (1) from the bracket by releasing the tabs. INSTALLATION PROCEDURE 1. Install the EVAP canister on the bracket. 2. Install the EVAP canister assembly into the vehicle. NOTE: Refer to Fastener Notice in Service Precautions. 3. Assemble the EVAP canister to the underbody with the 3 nuts. Tighten Tighten the nuts to 9 Nm (80 lb in) . 4. Install the purge hose (3) to the EVAP canister. 5. Install the fuel tank vapor hose (2) to the EVAP canister. 6. Install the vent hose (1) to the EVAP canister 7. Lower the vehicle.

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2007 Chevrolet Impala Evaporative Emission Canister Replacement Removal Procedure

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Filed Under (Chevrolet) by admin on 22-10-2010

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1. Remove the fuel tank. 2. Disconnect the evaporative emission (EVAP) line (3) from the canister.3. Reposition the EVAP canister hose clamp. 4. Remove the EVAP canister hose. 5. Disconnect the canister EVAP line from the fuel sender. 6. Squeeze the small retainer in front of the canister in order to disengage the canister. 7. Remove the EVAP canister. Installation Procedure Notice: Do not attempt to straighten kinked nylon pipes. Replace any kinked nylon pipes in order to prevent damage to the vehicle. Do not attempt to repair sections of nylon pipes. Replace damaged nylon pipes. Replace the vapor pipes with original equipment or parts that meet GM specifications. Replace the vapor hoses with original equipment or parts meeting GM specifications. Use only reinforced fuel-resistant hose identified with the word Fluoroelastomers or GM 6163M on the hose. 1. Install the EVAP canister. 2. Squeeze the small retainer in front of the canister in order to engage the canister. 3. Connect the canister EVAP line to the fuel sender. 4. Install the EVAP canister hose. 5. Position the EVAP canister hose clamp. 6. Connect the EVAP line (3) to the canister. 7. Install the fuel tank.

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2002 Ford Explorer Evaporative Emission Repair Verification Drive Cycle

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Filed Under (Ford) by admin on 24-02-2011

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Drive Cycle Recommendations NOTE: The following procedure is designed to execute and complete the evaporative emission repair verification drive cycle and to clear the Ford P1000, inspection and maintenance (I/M) readiness code. When the ambient air temperature is below 4.4°C (40° or above 37.8° (100° or the altitude is above 2,438 meters (8,000 feet), the EVAP monitor will not run. If the F) C F), P1000 must be cleared in these conditions, the powertrain control module (PCM) must detect them once (twice on some applications) before the EVAP monitor can be bypassed and the P1000 cleared. The EVAP bypassing procedure is described in the following drive cycle. 1. Most OBD II monitors will complete more readily using a steady foot driving style during cruise or acceleration modes. Operating the throttle in a smooth fashion will minimize the time necessary for monitor completion. 2. Fuel tank level should be between one-half and three-quarters full with three-quarters full being the most desirable. 3. The evaporative monitor can only operate during the first 30 minutes of engine operation. When executing the procedure for this monitor, stay in part throttle mode and drive in a smooth fashion to minimize fuel slosh. Drive Cycle Preparation NOTE: For best results, follow each of the following steps as accurately as possible. 4. NOTE: This step bypasses the engine soak timer and resets OBD II monitor status. Install the scan tool. Turn the key ON with the engine OFF. Cycle the key off, then on. Select the appropriate vehicle and engine qualifier. Clear all diagnostic trouble codes (DTCs) and carry out a PCM reset. 5. Begin to monitor the following PIDs: ECT, EVAPDC, FLI (if available) and TP MODE. Press Diagnostic Data Link, PCM, PID/Data monitor and record, press trigger to select each PID, then start. 6. Start the engine without returning the key to the OFF position. Preparation for Monitor Entry WARNING: Strict observance of posted speed limits and attention to driving conditions are mandatory when proceeding through the following drive cycle. 7. NOTE: This step allows engine warm-up and provides intake air temperature (IAT) input to the PCM. Idle the vehicle for 15 seconds. Drive at 64 km/h (40 mph) until the ECT is at least 76.7° (170° C F). 8. Is IAT above 4.4° (40°F) and below 37.8°C (100° C F)? If not, continue with the following steps but note that the EVAP Monitor Bypass portion of the drive cycle (step 13) will be required to bypass the EVAP monitor and clear the P1000. 9. NOTE: This step executes the heated oxygen sensor (HO2S) monitor. Cruise at 64 km/h (40 mph) for 60 seconds. 10. NOTE: This executes the EVAP monitor if IAT is above 4.4°C (40° and below 37.8° (100°F). F) C NOTE: To initiate the monitor, TP MODE should equal PT, EVAPDC must be greater than 75%, and FLI must be between 15 and 85%. NOTE: Avoid sharp turns and hills. Cruise at 72 to 104 km/h (45 to 65 mph) for 10 minutes. 11. NOTE: This step executes the ISC portion of the Secondary Air/CCM. Bring the vehicle to a stop. Idle with the transmission in DRIVE (for automatic transmission) or NEUTRAL (for manual transmission) for two minutes. Pending Code and EVAP Monitor Bypass Check 12. NOTE: This determines if a pending code is preventing the clearing of P1000. NOTE: If the EVAP monitor is not complete and IAT was below 4.4° (40° or above 37.8° (100°F) temperature range in Step 8, or the altitude is above 2,438 meters (8,000 feet), C F) C the EVAP Monitor Bypass (Step 13) must be carried out. Using the scan tool, check for pending codes. Conduct normal repair procedures for any pending code concerns. Rerun any incomplete monitor. EVAP Monitor Bypass 13. NOTE: This allows the bypass counter to increment to two. NOTE: Do not repeat Step 4. Park the vehicle for a minimum of eight hours. Repeat Steps 5 through 12.

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