Audi A6 C5 speed sensor replacement

Replacing the speed sensor

The speed sensor (abbreviated as DS or DSA) is installed on all modern cars and serves to measure the speed of the car and transfer this information to the computer.

How to replace the speed sensor (DS)

1. First of all, you need to turn off the engine, cool it and de-energize the system by removing the battery terminals. This is very important to avoid injury during repair work;
2. if there are parts that impede access to the detector, they must be disconnected. But, as a rule, this device is in stock;
3. the cable block is disconnected from the DC;
4. after which the device itself is directly disassembled. Depending on the brand of the machine and the type of sensor, it can be fastened with threads or latches;
5. a new sensor is installed in place of the faulty sensor;
6. the system is assembled in the reverse order;
7. it remains to start the car and make sure that the new device is working. To do this, it’s enough to drive a little: if the speedometer readings correspond to the real speed, then the repair was carried out correctly.

When buying a DS, it is necessary to strictly observe the brand of the device in order to install exactly the sensor model that will work correctly. For some of them you can find analogues, but you need to carefully study each of them to make sure they are interchangeable.

The process of replacing the detector itself is not complicated, but if you do not know how to replace it, or if a novice motorist has a problem, you should contact a service station and entrust your car to specialists.

In any case, before starting to repair a car, you should carefully study the instructions and manuals, as well as strictly follow the recommendations and schemes described in the manuals.

Signs of a malfunctioning speed sensor

The most common sign that a speed sensor has failed is idle problems. If the car stalls at idle (when shifting gears or coasting), among other things, be sure to check the speed sensor. Another sign that the speed sensor isn't working is a speedometer that doesn't work at all or doesn't work properly.

Most often, the problem is an open circuit, so the first step is to visually inspect the speed sensor and its contacts. If there are traces of corrosion or dirt, they must be removed, the contacts cleaned and Litol applied to them.

Checking the speed sensor can be done in two ways: with the removal of the DSA and without it. In both cases, a voltmeter will be required to check and diagnose the speed sensor.

The first way to check the speed sensor:

1. remove speed sensor
2. determine which terminal is responsible for what (the sensor has three terminals in total: ground, voltage, pulse signal),
3. connect the input contact of the voltmeter to the pulse signal terminal, ground the second contact of the voltmeter to a metal part of the engine or car body,
4. when the speed sensor rotates (for this you can throw a piece of pipe on the sensor shaft), the voltage and frequency on the voltmeter should increase.

The second way to check the speed sensor:

1. raise the car so that one wheel does not touch the ground,
2. connect the contacts of the voltmeter to the sensor in the same way as described above,
3. spin the raised wheel and control the change in voltage and frequency.

Please note that these test methods are only suitable for a speed sensor that uses the Hall effect in operation.

Where is the speed sensor in the Audi A6 C5?

The drive has speed sensors. There are even 3 of them, they are in the control unit, inside

• G182 - input shaft speed sensor
• G195 - output speed sensor
• G196 - output speed sensor -2

G182 readings are sent to the instrument panel. The other two work in the ECU.

His car was delivered on 17.09.2001/2002/XNUMX. But the model year is XNUMX.

Variator model 01J, tiptronic. Box code FRY.

CVT control unit part number 01J927156CJ

Where is the speed sensor in audi a6s5 variator?

Most likely your car has a CVT 01J.

And in this variator up to 3 speed sensors.

G182 - input shaft speed sensor

G195 - output speed sensor

G196 - output speed sensor -2

As for problems, it depends on which sensor is garbage. The speedometer may not work or give incorrect readings. Or maybe the box goes into sluggish mode due to a faulty speed sensor.

Checking the health of the condition and replacing the speed sensor

Checking the condition and replacing the vehicle speed sensor (DSS)

The VSS is mounted on the transmission case and is a variable reluctance sensor that begins to generate voltage pulses as soon as the vehicle speed exceeds 3 mph (4,8 km/h). The sensor pulses are sent to the PCM and used by the module to control the duration of the fuel injector open time and shifting. On models with manual transmission, an internal combustion engine is used, on models with automatic transmission there are two speed sensors: one is connected to the secondary shaft of the gearbox, the second to the intermediate shaft, and the failure of any of them leads to problems with gear shifting.

1. Disconnect the sensor harness connector. Measure the voltage at the connector (wiring harness side) with a voltmeter. The positive probe of the voltmeter must be connected to the terminal of the black-yellow cable, the negative probe to ground. There should be battery voltage on the connector. If there is no power, check the condition of the VSS wiring in the area between the sensor and the fuse mounting block (on the left under the dashboard). Also make sure the fuse itself is good. Using an ohmmeter, test for continuity between the black wire terminal of the connector and ground. If there is no continuity, check the condition of the black wire and the quality of its terminal connections.
2. Raise the front of the car and place it on jack stands. Block the rear wheels and shift into neutral. Connect the wiring to the VSS, turn on the ignition (do not start the engine) and check the signal wire terminal (blue-white) on the back of the connector with a voltmeter (connect the negative test lead to body ground). Keeping one of the front wheels stationary,
3. turn by hand, otherwise the voltage should fluctuate between zero and 5V, otherwise replace the VSS.