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1999 volkswagen beetle engine diagram

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1999 Volkswagen New Beetle GL timing belt replacement manual

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REMOVAL & INSTALLATION NOTE: For 2004, manufacturer does not provide a timing belt replacement interval. CAUTION: This application is an interference engine. Do not rotate camshaft or crankshaft when timing belt is removed, or engine damage may occur. NOTE: Engine code AEG is stamped into machined pad on front of cylinder block above crankcase breather, near cylinder head mating surface. See Fig. 1 . For all other 2.0L engines, engine code is stamped on transmission mating flange at the rear of the engine. See Fig. 2 . For all engines, code can also be found on the vehicle data plate and on a sticker on the timing belt cover. Fig. 2: Locating Engine Identification Code (AVH, AZG, BDC & BEV) Courtesy of VOLKSWAGEN UNITED STATES, INC. TIMING BELT Removal (AEG, AVH, AZG, BEV & BDC Engine Codes) 1. Remove right hand insulation tray from engine compartment. Remove engine cover. Rotate serpentine belt tensioner clockwise to relieve belt tension. Remove serpentine belt. See Fig. 3 . Lock in place using Mandrel (T10060) or a drift. Fig. 3: Releasing Serpentine Belt Tensioner Courtesy of VOLKSWAGEN UNITED STATES, INC. 2. Remove serpentine belt tensioner assembly. See Fig. 4 . Turn crankshaft to TDC position. See Fig. 5 . Align TDC marks visible in bellhousing access hole. See Fig. 6 . Remove upper timing belt cover. Ensure camshaft sprocket timing mark aligns with mark on rear cover. See Fig. 5 . 3. Support engine from above or below with floor jack to take engine weight off of mounts. Remove coolant reservoir and set aside. On Golf and Jetta, remove power steering reservoir (hoses attached), and set aside. On New Beetle, pull off EVAP hoses at EVAP canister and throttle valve housing. 4. On all models, remove engine mount from timing belt end of engine. See Fig. 7 . Remove crankshaft pulley from crankshaft sprocket. It is NOT necessary to remove center bolt (center bolt is torque-to-yield type that must be replaced if removed). 5. Remove timing belt covers. Remove engine support from front of engine. See Fig. 4

1999-2006 Volkswagen A4 Engine Speed Sensor G28 Checking

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Special tools, testers and auxiliary items required Multimeter . Wiring diagram. Test requirements The Motronic Engine Control Module (ECM) J220 fuses OK. Battery voltage at least 12.5 volts. All electrical consumers such as, lights and rear window defroster, switched off. Vehicles with automatic transmission, shift selector lever into position “P” or “N” . A/C switched off. Ground (GND) connections between engine/transmission/chassis OK. Ignition switched off. Test procedure Perform a preliminary check to verify the customers complaint. Refer to Preliminary Check Start diagnosis The Engine Speed (RPM) Sensor G28 detects RPM and reference marks. Without an engine speed signal, the engine will not start. If the engine speed signal fails while the engine is running, the engine will stop immediately Function test Connect the scan tool. Switch the ignition on. Using the scan tool, check the engine speed: End diagnosis and switch ignition off. If the specified value was not obtained: Checking internal resistance Disconnect the gray Engine Speed (RPM) Sensor G28 electrical harness connector 7 arrow 7 . Using a multimeter , check the Engine Speed (RPM) Sensor G28 terminals 2 to 3 7 see insert 7 for resistance. Specified value: 0.7 to 1000 kOhm Check Engine Speed (RPM) Sensor G28 terminals 1 to 2 and 1 to 3 for short circuits. Specified value: ? (infinity) If any of the specified values are not obtained: Replace the Engine Speed (RPM) Sensor G28 . Refer to Engine Mechanical, Fuel Injection and Ignition 7 Repair Group 13 . If the specified values are obtained: Checking wiring If the manufacturers test box is being used. Perform the following step. Install the test box Adapter F/VAG1598 (68 Pin) VAG1598/22 . If the manufacturers test box is not being used. Perform the following step. Remove the Motronic Engine Control Module (ECM) J220 . Refer to Motronic Engine Control Module J220, Replacing .

1999 Chevrolet Silverado The service engine soon light is on with trouble code P1416 present

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Tests/Procedures: 1. Use a scanner and command the air pump on with the engine running at idle. Check if the O2 sensors go lean. 2. If the O2 sensor does not go lean on one bank, see if the check valve at the exhaust manifold is stuck closed, not allowing air into the manifold. Potential Causes: Defective Check Valve Diagnostic Codes: P1416 Author: Christopher Pittman Average Reported Mileage: 85812 Confirmed Fix Summary Confirmed Fix 18 – Air Injection Reaction (AIR) Check Valve 1 – Air Injection Reaction (AIR) Check Valve, Air Injection Reaction (AIR) Pump Confirmed Fix Details Tech Reported Fix Details Confirmed Fix Lee Stroup Sr. November 15, 2007 2001 Chevrolet Silverado 1500, 5.3L, Vin T, Eng Cfg V8 * A.I.R. Check Valve – removed check valves, found one rusted closed, one restricted, replaced both valves. Moisture from exhaust seems to have rusted both valves. Air Injection Reaction (AIR) Check Valve Paul Puleo August 20, 2009 1999 Chevrolet Camaro, Z28 5.7L * Replaced Both Air Injection Reaction (AIR) Check Valves – bank 2 AIR check valve restrticted, bank 1 slightly restricted replaced both Air Injection Reaction (AIR) Check Valve SouthGate January 05, 2009 2000 Chevrolet Silverado 1500, 4.8L, Vin V, Eng Cfg V8 * Replaced Air Injection Reaction (AIR) Check Valve – replaced boht check valves. fix the code. Air Injection Reaction (AIR) Check Valve Dwight Heckman July 31, 2008 2000 Chevrolet Blazer, 4.3L * Check Valve – replacing the check valve and cleaning out the lines repaired the problem. Air Injection Reaction (AIR) Check Valve Nick Secchitano June 16, 2009 2000 Chevrolet Silverado 1500, 5.3L, Vin T, Eng Cfg V8 * Replaced Both Air Injection Reaction (AIR) Check Valves – Air injection check valves Air Injection Reaction (AIR) Check Valve Mark Bertelsen 1998 Chevrolet Camaro, Z28 5.7L * Replaced Air Injection Reaction (AIR) Check

2001 Volkswagen Passat GLX 4Motion UPDATE PROGRAMMING FOR CATALYTIC CONVERTER SYSTEM Manual

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Programming software update. SERVICE PROCEDURE Engine Control Module Update – Programming (Flashing) Tip: When performing the update programming procedure, ALL DTCs for all systems are erased. DTCs linked to Guided Fault Finding function tests will be lost. Therefore, always address stored DTCs for Customer concerns unrelated to the update programming procedure first. The following “Update – Programming” (flashing) process may overwrite any “TUNED” ECM programming. A “TUNED” ECM is described as any ECM altered so as to perform outside the normal parameters and specifications approved by Volkswagen of America, Inc. If you encounter a vehicle with a “Tuned” ECM, prior to performing the “Update – Programming” (flashing) procedure: Your Dealership should place the vehicle owner on notice in writing, that their ECM was found to have been tuned, and that any damage caused by the tuning of the ECM (including any adverse emissions consequences) will not be covered by Volkswagen of America, Inc. warranties. For any repair requested by the owner under warranty or outside warranty that requires update programming, which will automatically wipe out the “Tuning” program, your Dealership should advise the owner of the above and get Owner’s written consent (see attached Control Module Tuning form) to the update programming procedure. Tool Requirements VAS 5051 or VAS 5052 (with Base CD V.10.01 and the Brand CD V.10.70.00 or higher). “Update – Programming” (flashing) CD 8D0906961A, B, D. Tip: Additional copies of the “Update – Programming” CD (Literature Number 8D0906961A, B, D) may be ordered from the Volkswagen Technical Literature Ordering Center at www.vw.resolve. com , or by calling 1- 800-544-8021 from 8:00 a.m. to 8:00 p.m. EST Monday through Friday. This number can be dialed in both the United States and Canada

1999 Saturn SL1 L4-1.9L SOHC VIN 8 Engine – Driveability Concerns/ Cooling System DTC’s Set

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1. Disconnect engine coolant temperature sensor electrical connector and inspect sensor and connector terminals for corrosion and/or evidence of engine coolant. ^If terminals are corroded or if there is evidence of engine coolant proceed to step 4. ^If terminals are not corroded and there is no evidence of engine coolant, reconnect the electrical connector and continue to next step. 2. Perform one or both of the following checks to determine whether the engine coolant temperature sensor is providing the correct temperature indication. If engine coolant temperature sensor reading does not pass either of the above tests, continue with next step. ^If engine is at ambient temperature (vehicle has been sitting overnight or not started for several hours), use a Scan tool to compare the inlet air temperature ( IAT ) to the engine coolant temperature ( ECT ). These two readings should be within 2°C (4°F) of each other. ^If engine is at operating temperature, install a thermometer in the coolant recovery reservoir. With the engine running and A/C off, use a Scan tool to compare the engine coolant temperature sensor reading to the thermometer reading. These two readings should be within 8°C (15°F) of each other If engine coolant temperature sensor reading passes both of the tests above, refer to appropriate symptom diagnostic chart in the Engine/Emissions Controls Section of applicable Engine Service Manual. 3. Turn ignition off. 4Remove coolant surge tank cap. 5. Drain at least 1.9 L (2 Qt.) of engine coolant from the cooling system by opening radiator drain valve or removing engine drain plug. Collect engine coolant in a container. 6. Disconnect engine coolant temperature sensor electrical connector. 7. Remove engine coolant temperature sensor from cylinder head. 8. Obtain replacement engine coolant temperature sensor (P/N 21025106). 9. Use appropriate tap to clean sensor mounting hole of any thread sealant residue. 10. Install engine coolant temperature sensor in cylinder head. Torque: Engine Coolant Temperature Sensor: 8 Nm (71 in-lbs) 11. Inspect harness connector terminals for corrosion and/or evidence of engine coolant. If harness connector terminals are corroded or there is evidence of engine coolant, the harness connector must be replaced with new connector (P/N 12117087-includes: connector, terminals, wires, and splice sleeves). 12. Connect engine coolant temperature sensor connector. 13. Transfer engine coolant drained in step 5 into coolant surge tank. If necessary fill coolant surge tank to the FULL COLD range with 50/50 solution of correct type of antifreeze and clean water. 14. Start engine and check for leaks. 15. Run engine until upper radiator hose is hot, then add additional coolant if needed to bring the level to the FULL COLD level (1991-early 1997) or within the Min./Max. cold range (late l997-2001). 16. Install coolant surge tank cap.