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https://telegra.ph/Why-New-Audi-Key-Is-Fast-Becoming-The-Hottest-Trend-Of-2023-09-27
How to Replace an Audi G28 Engine Speed Sensor Charles the Humble Technician shows how to replace the G28 Engine Speed Sensor The sensor is situated at the top of the transmission just above the flywheel ring gear It transmits a signal the ECU via an uncolored wire T5549 which is then sent to the tachometer located in the instrument cluster 1 Engine Speed Sensor The grey wire is located on the outside of the transmission above the flywheel ring The sensor transmits a signal via the grey wire to pin T5549 The ECU utilizes this information to control the amount of fuel and boost It also sends an indicator to the G5 Tachometer in instrument cluster The sensor serves as a reference for comparing with the G40 Camshaft Position Sensor The ecu must know when the crankshaft is TDC and where the camshaft is so it can start spark and injectors according to the situation If this sensor fails the ECU will display a P00160 code which means the Crank Shaft and Intake Camshaft arent in sync and could indicate the chain stretching or a jump link on the upper timing chain However the error code wont appear on its own without additional information from other sensors G4 and G40 Testing is a bit challenging because there are two pins for the connector and they have different functions but the most effective way to test it is by measuring resistance between the sensor and the ECU When the sensor is operational it should be reading approximately 1000 ohms Examine for evidence of coolant or oil in the connector bay if you have problems with this part 2 Injectors Yesterday accelerating full speed from highway paytoll I experienced massive power loss like the engine is running out of gas or injectors are not firing any more I took out the spark plugs this morning three were soaked with gasoline and the 4th was dry I put a piece of tissue over each injector hole and when I turn the engine on without sparks the 3 that have gazoline pop right out The 4th one remains closed I tried to test the ground connections of ECU pins 1430 and 4855 I got 0ohm Im assuming the issue is somewhere else I also tried to reset the PID with no success The car is able to start when the G28 is disconnected and it runs perfectly when it is plugged in however it has the intermittent misfire issue at higher RPM The coolant sensor G62 even if it is not plugged in shows an ice temperature of 49c I also noticed that the oil gauge in the cockpit shows 2 bars but the actual pressure is 0 Im not certain what to do but i believe that ive ruled out everything else However im afraid that i might have missed something Let me know if you have any ideas TIA 3 Fuel Pump The fuel pump of the g28 gets a signal from the RPM sensor The GMstyle sender is identical to the G4 and they both work in the 80 100 200 UrS and RS2 cars which is why you can easily locate one at a junkyard or at a parts store It is simple to test them just put your DMM into resistance mode and determine the distance between pins 1 and 2 with the bump on the connectors edge facing upwards They must be infinite Ohms 4 ECU The ECU in our 20vt turbo 3B AAN ABY ADU engines must know the position and speed of the crankshaft to make decisions regarding fuel injector timing etc It uses a Crank Position Sensor G4 and an Engine Speed Sensor G28 to achieve this If either of these sensors go bad you will get codes on the diagnostic scanner that could cause engine shut down Some of the signs of a malfunctioning G28 sensor are an inaccurate rev counter in the gearbox the gears are shifting faster than normal andor a misfire when in gear It is possible that the sensor is failing and requires to be replaced if you experience any of these signs Theyre inexpensive and easy to locate especially if theyre an Bosch model like ours If you prefer GMs version of this component is a good option 5 Tachometer A malfunctioning engine speed sensor could be the reason behind numerous problems in your car Its a vital component of your Audis transmission since it relays information to the ECU about how fast or slow the vehicles crankshaft is turning audi key replacement can cause the transmission to malfunction and other car components to be affected The G5 engine sensor is located near the edge of transmission above the flywheel ring It transmits an electrical signal through a gray wire to the ECU pin T5549 audi convenience key utilizes this signal to regulate fuel and boost as well as timig It also sends it to the G5 Tachometer inside the instrument cluster You can test the sensor for failure by checking continuity between it and the tachometer between ECU pin T5549 and the instrument cluster connection to pin T6a1 trace 79 as well as between T6a1 and the instrument cluster pin T26a12 You should observe approximately 1000 ohms resistance between those points This is a standard component across the Audi 80 100 200 UrS and RS2 range from 1985 MC to the 1997 UrS AAN and 1995 RS2 ADU so good ones might be availble in wrecking yards