Electronic control unit repair (replacement of pressure sensors) DQ500 0BT 0BH

If computer diagnostics show such errors (and you are sure that the wires and connectors of the electrical circuit are in order)

• P1735 (10666) - Clutch position sensor (clutch) 1, electrical fault;
• P1736 (10668) - Clutch position sensor (clutch) 2, electrical fault;

...then the pressure sensors themselves probably need to be replaced.

Also sensors can be diagnosted without removing the ECU from the car, for this you need to turn on the ignition, go to the diagnostics, then to the current parameters and without starting the engine (this is important!) and you can see how much the K1 and K2 sensors show in cold and hot state. With the engine off, the pressure should be 0 (zero) bar, if the readings differ by at least 0.3 bar up or down, this indirectly indicates problems with the sensor.

DQ500 pressure sensors are on sale, and we also provide a service for replacing sensors and give a guarantee for the work performed for 1 year without mileage limitation.

The cost of replacing sensors is $500, this amount includes 2 sensors and the cost of replacing them. Sometimes one sensor fails, in which case the repair will cost $255 ($195 sensor + $60 labor). Contacts for sending the unit for repair can be found here

Repair looks like this:

1. Using a milling cutter, we cut out a part of the body to get to the contacts of the pressure sensors.
2. Cleaning from chips.
3. Measurement of the output readings of the sensors with a voltmeter.
4. Using a vacuum cleaner, remove the gel to access the contacts
5. Using a puller and mandrels, we press out pressure sensors
6. Soldering contact tracks
7. Soldering wires to sensors and contact pads
8. Checking the output voltages of the new sensors (they should be 0.78 - 0.8 volts)
9. Applying adhesives
10. Warming  up
11. Soldering the cover of the control unit
12. Cleaning the lid with a cutter and apply epoxy resin

                                                                                                                      Video version