5 Laws Anybody Working In Audi G28 Should Be Aware Of
5 Laws Anybody Working In Audi G28 Should Be Aware Of
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How to Replace an Audi G28 Engine Speed Sensor
In this video, Charles the humble mechanic demonstrates how to replace the G28 engine speed sensor. This sensor is located at the edge of transmission over the flywheel gear. It sends a message to the ECU via a grey wire T55/49, then to the tachometer 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 transmits signals through the grey wire to pin T55/49. The ECU uses this information to control fuel and boost. It also sends signals to the G5 tachometer inside the instrument cluster.
The sensor serves as a reference to correlate with the G40 Camshaft Position Sensor. The ecu must know when the crankshaft has reached TDC, and the location of the camshaft to trigger the spark and injectors.
If this sensor fails, the ECU will display a P00160 code which means the Crank Shaft and Intake Camshaft are out of sync and could indicate the chain is stretched or a jump link on the upper chain of timing. However, the code won't appear on its own without additional information from other sensors (G4 and G40).
Testing is a bit challenging since there are two connector pins, and they have different functions but the most effective method of testing it is to measure resistance between the sensor and the ECU. When the sensor is operational, it should read approximately 1000 ohms. Look for signs of coolant or oil in the connector bay if you have issues with this component.
2. Injectors
Yesterday, when i was accelerating to the fullest speed from highway paytoll, I experienced a big cut in power like the engine is running out of gas or injectors aren't firing at all. I took out the spark plugs this morning and found that 3 were soaked in gasoline, and the fourth was dry. I put tissue over each hole in the injector and when i start the engine with no sparks, the ones that have gazoline pop right out. The fourth one remains closed. I inspected the ground connection on ECU pins 14/55, 30/55 and 48/55. i get zero Ohm. Therefore, i think the issue is in another place.
I also tried to reset PID but without success. The car will start when the G28 is unplugged, and it is running fine with the G28 connected. However, the intermittent misfire problem still occurs at higher RPM. The coolant sensor (G62), even when it is unplugged, shows an ice temperature of -49c. I also noticed that the oil gauge in the cockpit shows 2 bars while the actual pressure is zero.
I'm not certain what to do, i feel i have pretty much ruled out everything else. I'm concerned that i may have missed something. Let me know if you have any ideas! TIA!
3. Fuel Pump
The fuel pump on replacement audi car key the g28 is activated by a signal by the RPM sensor. The GM-style transmitter is identical to the G4 sender, and both operate on the 80,100,200, UrS, and RS2 vehicles. It is easy click here to find a spare in a wrecking shop or a parts store. It is simple to test them - just switch your DMM into resistance mode and measure the distance between pins 1 and 2 (with the bump at the connector's end facing up). They should be infinite Ohms.
4. ECU
Our 20vt turbo (3B AAN, ABY, and ADU) engines are equipped with an ECU that needs to know the speed and position of the crankshaft to make decisions about timing of the fuel injector, for example. It makes use of a Crank Position Sensor G4 and an Engine Speed Sensor G28 to achieve this. If you have a problem with either of these sensors, the diagnostic scanner will display codes that could lead to replacement audi car key an engine shut down.
A damaged G28 sensor could result in an inaccurate speed counter for your gearbox, a gearbox that shifts more quickly than normal, or a misfire while in gear. It is probable that the sensor is failing and requires to be replaced if you experience any of these symptoms. They're inexpensive and easy to locate particularly if they're a Bosch model like ours. Alternately, GM's version this get more info component is an excellent choice.
5. Tachometer
A damaged engine sensor could cause a number of problems in your car. It's a vital component of your Audi's transmission, as it sends information to the ECU about how the car's crankshaft is spinning. When this sensor fails, it could cause problems for the transmission as well as the rest of the car's components.
The G5 engine speed sensor is located at the edge of the transmission just above the flywheel ring gear and sends a signal directly to the ECU at pin T55/49 via a grey wire. The ECU utilizes this signal to control the flow of fuel and boost as well as timig. It also relays it to the G5 Tachometer inside 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 [79trace [79]), and between pin T6a/1 as well as pin T26a/12. You should see around 1000 click here ohms of resistance between these two points. This is the same across the Audi 80-100-200-RS2 series, starting from the 1985 MC all the way up to the 1997 UrS AN and the 1995 RS2 Du You may also find good ones in wrecking yards.