"The Ultimate Cheat Sheet On Audi G28
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How to Replace an audi Replacement key Cost G28 Engine Speed Sensor
Charles the Humble Technician shows you how to replace the G28 Engine Speed Sensor. This sensor is located on the outside of the transmission just above the flywheel gear. It sends a message to the ECU via a grey wire T55/49, then to the tachometer located on the instrument cluster.
1. Engine Speed Sensor
The grey wire is located at the edges of the transmission, above the flywheel ring. The sensor sends an electrical signal through the grey wire to pin T55/49. The ECU then uses this information to control fuel, timig and boost. It also sends an alert to the G5 Tachometer in instrument cluster.
The sensor is used to link the G40 Camshaft position Sensor. The ecu must know when the crankshaft has reached TDC and also the position of the camshaft, in order to activate the spark and injectors.
If this sensor fails to function, the ECU will display a P00160 error message. This indicates that the Crank Shaft is not in alignment with the Intake Camshaft. It could also be a sign of a chain stretch or a jumped chain link in the upper timing chain. The code will not appear without the additional information supplied by other sensors (G4 or G40).
Testing is a bit tricky since there are two connector pins, and they serve different purposes but the best method of testing it is to measure the resistance between the sensor and the ECU. It should read around 1000 ohms when it is operating at its maximum. Check for evidence of coolant or oil in the connector bay if you have problems with this part.
2. Injectors
Yesterday, as i was accelerating off the highway paytoll at full speed I noticed a significant reduction in power. It was like the engine was running out of gas. Or, my injectors weren't firing. I pulled out the spark plugs this morning and found that 3 were soaked with gasoline and the fourth was unclean. I put a piece of tissue over each hole in the injector and when I start the engine without sparks, the three that have gazoline pop right out. The 4th one stays shut. I tried to test the ground connections of ECU pins 14,30 and 48/55. I found 0ohm. Therefore, i think the issue is somewhere else.
I also tried to reset the PID with no success. The car can start if the G28 is unplugged and is running fine when it is connected, but still has the intermittent misfire issue at higher RPM. The coolant temperature sensor (G62) shows the wrong temperature of that is -49c even after unplugging it. Also, spare audi key for audi (www.deepzone.net) i noticed that the oil pressure gauge in the cockpit is showing 2 bar while the actual pressure is 0.0 when i rev the engine.
I'm not certain what to do, as i think i've pretty much eliminated everything else. I'm concerned that i may have missed something. If anyone has suggestions, please let me know! TIA!
3. Fuel Pump
The fuel pump in the g28 is activated by a signal sent by the RPM sensor. The GM-style transmitter is similar to the G4 sender, and both operate on the 80,100,200, UrS, and RS2 vehicles. It is easy to find a spare in a wrecking shop or a parts store. Test them out to do - just put your DMM in resistance mode and take measurements between pins 1 (with the bump on the connector's side up) and 2 (2nd from the left on the black end of the connector). They must be infinite Ohms.
4. ECU
Our 20vt turbo (3B, AAN, ABY and ADU) engines have an ECU that has to know the speed and position of the crankshaft to make decisions regarding timing of the fuel injector, for example. It uses a Crank Position Sensor G4 and an Engine Speed Sensor G28 to accomplish this. If you are experiencing issues with either of these sensors, the diagnostic scanner will show codes that could lead to an engine shutdown.
The signs of a malfunctioning G28 sensor Audi Key Replacement include an inaccurate rev counter in the gearbox, gears shifting quicker than normal, and/or a misfire when in gear. It is possible that the sensor is failing and requires to be replaced if you notice any of these symptoms. The good news is they are very affordable and readily available, especially if you're looking at an Bosch unit like ours. Alternatively, the GM version of this component is also a great option.
5. Tachometer
A malfunctioning engine sensor can cause a number of problems in your car. It's a vital component of your audi key replacement near me's transmission, since it relays information to the ECU about how the car's crankshaft is rotating. If the sensor fails, it will affect the performance of the transmission as well as the other car's components.
The G5 engine speed sensor is situated on the edge of the transmission just above the flywheel ring gear. It transmits a signal to the ECU at pin T55/49 through an uncolored wire. The ECU utilizes this signal to regulate fuel and boost, as well as timig. It also sends it to the G5 Tachometer located in the instrument cluster. You can check for sensor failure by checking continuity from the sensor to the tachometer. Additionally, you can examine the continuity between pins T55/49 of the ECU and pin T6a/1 of the instrument cluster (trace [79]), and between pin T6a/1 and pin T26a/12. You should see around 1000 ohms of resistance between these two points. This part is common across the audi keys 80-100-200-RS2 range, from the 1985 MC all the way up to the 1997 UrS AN and the 1995 RS2 DU, so you might find some good ones in wrecking yards.
Charles the Humble Technician shows you how to replace the G28 Engine Speed Sensor. This sensor is located on the outside of the transmission just above the flywheel gear. It sends a message to the ECU via a grey wire T55/49, then to the tachometer located on the instrument cluster.1. Engine Speed SensorThe grey wire is located at the edges of the transmission, above the flywheel ring. The sensor sends an electrical signal through the grey wire to pin T55/49. The ECU then uses this information to control fuel, timig and boost. It also sends an alert to the G5 Tachometer in instrument cluster.
The sensor is used to link the G40 Camshaft position Sensor. The ecu must know when the crankshaft has reached TDC and also the position of the camshaft, in order to activate the spark and injectors.
If this sensor fails to function, the ECU will display a P00160 error message. This indicates that the Crank Shaft is not in alignment with the Intake Camshaft. It could also be a sign of a chain stretch or a jumped chain link in the upper timing chain. The code will not appear without the additional information supplied by other sensors (G4 or G40).
Testing is a bit tricky since there are two connector pins, and they serve different purposes but the best method of testing it is to measure the resistance between the sensor and the ECU. It should read around 1000 ohms when it is operating at its maximum. Check for evidence of coolant or oil in the connector bay if you have problems with this part.
2. Injectors
Yesterday, as i was accelerating off the highway paytoll at full speed I noticed a significant reduction in power. It was like the engine was running out of gas. Or, my injectors weren't firing. I pulled out the spark plugs this morning and found that 3 were soaked with gasoline and the fourth was unclean. I put a piece of tissue over each hole in the injector and when I start the engine without sparks, the three that have gazoline pop right out. The 4th one stays shut. I tried to test the ground connections of ECU pins 14,30 and 48/55. I found 0ohm. Therefore, i think the issue is somewhere else.
I also tried to reset the PID with no success. The car can start if the G28 is unplugged and is running fine when it is connected, but still has the intermittent misfire issue at higher RPM. The coolant temperature sensor (G62) shows the wrong temperature of that is -49c even after unplugging it. Also, spare audi key for audi (www.deepzone.net) i noticed that the oil pressure gauge in the cockpit is showing 2 bar while the actual pressure is 0.0 when i rev the engine.
I'm not certain what to do, as i think i've pretty much eliminated everything else. I'm concerned that i may have missed something. If anyone has suggestions, please let me know! TIA!
3. Fuel Pump
The fuel pump in the g28 is activated by a signal sent by the RPM sensor. The GM-style transmitter is similar to the G4 sender, and both operate on the 80,100,200, UrS, and RS2 vehicles. It is easy to find a spare in a wrecking shop or a parts store. Test them out to do - just put your DMM in resistance mode and take measurements between pins 1 (with the bump on the connector's side up) and 2 (2nd from the left on the black end of the connector). They must be infinite Ohms.
4. ECU
Our 20vt turbo (3B, AAN, ABY and ADU) engines have an ECU that has to know the speed and position of the crankshaft to make decisions regarding timing of the fuel injector, for example. It uses a Crank Position Sensor G4 and an Engine Speed Sensor G28 to accomplish this. If you are experiencing issues with either of these sensors, the diagnostic scanner will show codes that could lead to an engine shutdown.
The signs of a malfunctioning G28 sensor Audi Key Replacement include an inaccurate rev counter in the gearbox, gears shifting quicker than normal, and/or a misfire when in gear. It is possible that the sensor is failing and requires to be replaced if you notice any of these symptoms. The good news is they are very affordable and readily available, especially if you're looking at an Bosch unit like ours. Alternatively, the GM version of this component is also a great option.
5. Tachometer
A malfunctioning engine sensor can cause a number of problems in your car. It's a vital component of your audi key replacement near me's transmission, since it relays information to the ECU about how the car's crankshaft is rotating. If the sensor fails, it will affect the performance of the transmission as well as the other car's components.
The G5 engine speed sensor is situated on the edge of the transmission just above the flywheel ring gear. It transmits a signal to the ECU at pin T55/49 through an uncolored wire. The ECU utilizes this signal to regulate fuel and boost, as well as timig. It also sends it to the G5 Tachometer located in the instrument cluster. You can check for sensor failure by checking continuity from the sensor to the tachometer. Additionally, you can examine the continuity between pins T55/49 of the ECU and pin T6a/1 of the instrument cluster (trace [79]), and between pin T6a/1 and pin T26a/12. You should see around 1000 ohms of resistance between these two points. This part is common across the audi keys 80-100-200-RS2 range, from the 1985 MC all the way up to the 1997 UrS AN and the 1995 RS2 DU, so you might find some good ones in wrecking yards.
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