2001 GALANT EVAPORATIVE EMISSION PURGE
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Filed Under (Toyota) by admin on 26-01-2011
CIRCUIT DESCRIPTION The vapor pressure sensor and VSV for vapor pressure sensor are used to detect abnormalities in the evap- orative emission control system. The ECM decides whether there is an abnormality in the evaporative emission control system based on the vapor pressure sensor signal. DTC P0441 and P0446 are recorded by the ECM when evaporative emissions leak from the components within the dotted line in Fig. 1 below, or when there is a malfunction in either the VSV for EVAP, the VSV for vapor pressure sensor, or in the vapor pressure sensor itself. WIRING DIAGRAM Refer to DTC P0440 on page DI-84 . INSPECTION PROCEDURE HINT: S If DTC P0441, P0446, P0450 or P0451 is output after DTC P0440, first troubleshoot DTC P0441, P0446, P0450 or P0451. If no malfunction is detected, troubleshoot DTC P0440 next. Read freeze frame data using TOYOTA hand-held tester or OBD II scan tool, as freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at the time of the malfunction. When the ENGINE RUN TIME in the freeze frame data is less than 200 seconds, carefully check the VSV for EVAP, charcoal canister and vapor pressure sensor. S S TOYOTA hand-held tester:
Filed Under (Ford) by admin on 28-02-2011
WARNING: The evaporative emissions system contains fuel vapor and condensed fuel vapor. Although not present in large quantities, it still presents the danger of explosion or fire. Disconnect the battery ground cable from the battery to minimize the possibility of an electrical spark occurring, possibly causing a fire or explosion if fuel vapor or liquid fuel are present in the area. Failure to follow these instructions can result in personal injury. WARNING: Do not smoke or carry lighted tobacco or open flame of any type when working on or near any fuel related component. Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions may result in personal injury. 1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Section 100-00. 2. Disconnect the battery ground cable. For additional information, refer to Section 414-00. 3. Remove the parts in the order indicated in the following illustrations and tables. To remove individual parts, only carry out the listed steps: Items 2, 5 and 13: Quick Connect Fitting Removal Note 1. CAUTION: Fuel injection equipment is manufactured to very precise tolerances and fine clearances. It is therefore essential that absolute cleanliness is observed when working with these components. Always install blanking plugs to any open orifices or tubes. CAUTION: When reusing liquid or vapor tube connectors, make sure to use compressed air to remove any foreign material from the connector retaining clip area before separating from the tube. Disconnect the quick release fitting.
Filed Under (Ford) by admin on 24-02-2011
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.
Filed Under (Oldsmobile) by admin on 27-09-2010
The purpose of this test is to satisfy the enable criteria necessary to execute I/M readiness diagnostics for the evaporative emission (EVAP) system. The test may be used to set the I/M System Status indicators to YES. Service Bay Tests are included on the scan tool for some systems depending upon vehicle make and model. The test is designed to allow the EVAP Diagnostic Tests to run in service bay conditions. Ensure that the vehicle meets the requirements listed in Conditions for Running before performing either EVAP System Test. Failure to meet the necessary requirements may produce inaccurate test results. CONDITIONS FOR RUNNING Non Scan Tool Service Bay Test equipped vehicles ^ The barometric pressure (BARO) is more than 75 kPa. ^ The fuel level is between 15-18 percent. ^ The battery voltage is between 10-18 volts. ^ The test will initiate only after a cold start. The control module considers the engine to be cold if the following conditions are met: – The engine coolant temperature (ECT) is between 4-30°C (39-86°F). – The intake air temperature (IAT) is between 4-30°C (39-86°F). – The difference between the ECT and the IAT is less than 8°C (14°F). Scan Tool Service Bay Test equipped vehicles ^ The BARO is more than 75 kPa. ^ The ECT is less than 70°C (158°F). ^ The fuel level is between 15-18 percent. ^ The battery voltage is between 9-18 volts.
Filed Under (Chevrolet) by admin on 22-10-2010
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.