Auto Repair Manual Free Download and ReviewsFree download ebook pdf files automotive manual

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WARNING: Fuel in the fuel system remains under high pressure even when the engine is not running. Before repairing or disconnecting any of the fuel system components, the fuel system pressure must be relieved to prevent accidental spraying of fuel causing personal injury or a fire hazard. 1. If the fuel tank, fuel transfer pump or fuel delivery module is being removed drain the fuel tank. For additional information, refer to Fuel Tank Draining in this section. 2. If the fuel tank is being removed, remove the driveshaft. For additional information, refer to Section 205-00. 3. Remove the parts in the order indicated in the following illustrations and tables. To remove individual parts, only carry out the listed steps: Part Steps 4. To install, reverse the removal procedure. 5. Fill the fuel tank. 6. Turn the ignition key to the ON position to pressurize the fuel system. 7. Visually inspect the fuel system for leaks. Item 5: Fuel Filler Pipe Removal Note 1. Remove the right rear well inner fender splash shield. 2. CAUTION: Some fuel will remain in the filler pipe after draining the fuel tank. Carefully drain the filler pipe into an approved container. Loosen the clamp at the fuel tank filler pipe and remove the filler pipe.

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2002 and 2003MY Impreza WRX models registered in 16 “cold weather” states located in NOAA Climate Zone 1. The affected states are: Alaska, Colorado, Iowa, Idaho, Maine, Michigan, Minnesota, Montana, North Dakota, Nebraska, New Hampshire, New York, South Dakota, Vermont, Wisconsin, and Wyoming. In extremely cold temperatures, a certain engine fuel line/hose may temporarily seep some fuel during initial cold engine start up. If this condition occurs, vehicle occupants may notice the smell of fuel. To correct this condition, affected vehicles will require replacement of the engine fuel delivery line and hose. A special repair parts kit is available and contains all parts needed to complete this repair.

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Circuit Description The control module communicates with other modules using the Class 2 Serial Data circuit. The vehicle theft deterrent (VTD) (Passlock) module sends a vehicle security password to the control module, via the Class 2 Serial Data circuit, after the system has sensed the proper operation of the ignition switch and lock, and determined that the switch and lock have not been tampered with. If this password matches the password stored in the control module, fuel will be enabled. If the VTD (Passlock) module does not send a password, or if the control module does not receive it, the vehicle will not start, or it may start and stall. This will set a DTC P1626 in the control module memory. If communication is lost after receiving the password, the VTD (Passlock) system will go into Fail Enable, set a U1192 in the control module, and the engine will continue to run. This will allow the engine to restart on future ignition cycles but may set a DTC P1626 as the engine is started. If the battery is disconnected or the codes are cleared, the vehicle will lose its Fail Enable status and will not start until communication is re-established. Conditions for Running the DTC • The Vehicle Theft Deterrent (VTD) system is enabled. Conditions for Setting the DTC The VCM has not established communications with the VTD (Passlock) control module and has not received a valid password before reaching the fuel enable decision point. Action Taken When the DTC Sets When the failure occurs before the VCM receives a Fuel Continue Password (during engine cranking): • The vehicle does not start, or it starts and stalls. • The VCM disables fuel delivery, until the fault is corrected and a valid password is received from the VTD (Passlock) Control Module. • A DTC P1626 is stored in the VCM memory. • The VCM will not illuminate the MIL.

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The C3I ignition system uses a waste spark method of spark distribution. In this type of ignition system, the ignition module triggers the correct coil pair, based on both signals from the crankshaft sensor, resulting in both spark plugs firing at the same time. One cylinder is on the compression cycle, while the other one is on the exhaust cycle, resulting in a lower energy requirement to fire the spark plug on the exhaust cycle. The remaining high voltage is used to fire the spark plug on the compression cycle. During cranking, the ignition module monitors the dual crank sensor sync signal. The sync signal is used to determine the correct cylinder pair to spark first. After the sync signal has been processed by the ignition module, it sends a fuel control reference pulse to the ECM. When the ECM receives this pulse, it will command all six injectors to open for one shot of fuel in all cylinders. After the priming, the injectors are left off for the next six fuel control reference pulses from the ignition module. This allows each cylinder a chance to use the fuel from the priming shot. During this waiting period, a cam pulse will have been received by the ECM. Now the ECM begins to operate the injectors sequentially, based on true camshaft position. However, if the cam signal is not present at start-up a Code 41 will set and the ECM will start sequential fuel delivery in any old random pattern. There is a 1 chance in 6 that fuel delivery will be correct. The sync signal is used only by the ignition module. It is used for spark synchronization at start-up only and not passed on to the ECM

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Linkage Measurement CAUTION: Before attempting to test the Throttle Position Sensor (TPS), verify the linkage adjustment dimension shown in the figure above. This dimension MUST be 126.5 mm (5.0 inches) BEFORE testing. For linkage adjustment procedures, refer to Throttle Linkage Adjustment. CAUTION: Before testing the TPS, verify that the engine is set at correct low idle speed. Refer to Idle Speed Adjustment. This can be found in the Fuel Delivery and Air Induction system adjustments section. 1. After confirming the correct linkage adjustment and idle speed, proceed to the following: Throttle Position Sensor Location 2. Attach a paper clip into the center terminal of the TPS electrical connector. Do not remove the connector from the TPS for this test. 3. Attach the positive lead of a voltmeter to this paper clip and the negative lead to a good ground. 4. Turn the ignition switch to the ON position. Do not start engine. 5. The voltage at the TPS center terminal should be 1.0 volt (+/- 0.2 volt) with linkage at idle position. The voltage at the wide open throttle position