Diagnostics of automatic transmission of Volkswagen Multivan cars
1. Visual inspection
* Check the level and condition of the transmission fluid.
* Inspect the transmission for leaks, cracks or damage.
* Make sure all connections and fastenings are properly tightened.
2. Scanning trouble codes
* Connect the diagnostic scanner to the vehicle’s diagnostic connector.
* Read fault codes stored in the transmission controller memory.
* Analyze trouble codes to identify potential problems.
3. Checking transmission fluid pressure
* Using a specialized pressure gauge, check the transmission fluid pressure at idle and under load.
* Compare the readings obtained with those specified by the manufacturer.
4. Checking solenoids
* Using a diagnostic scanner, activate the solenoids and monitor the operation of the valves.
* Check the resistance and electrical connections of the solenoids.
5. Checking the torque converter
* Remove the torque converter and inspect it for damage or wear.
* Check the locking condition of the torque converter.
6. Checking planetary gears and friction discs
* Remove the gearbox and disassemble it.
* Inspect planetary gear sets, friction plates and other components for wear, damage or leaks.
7. Checking the sensors
* Check the operation of the input and output shaft speed sensors, transmission fluid temperature sensor and other sensors.
* Check the electrical connections and signals of these sensors.
8. Road test
* Carry out a road test to check the transmission’s performance under various driving conditions.
* Pay attention to smooth shifting, vibration, noise or other problems.
9. Data analysis
* Analyze all collected data, including fault codes, pressure readings, component test results and road test observations.
* Diagnose and determine necessary repairs.
Note: Accurate diagnosis of Volkswagen Multivan automatic transmission requires specialized tools, knowledge and experience. It is recommended to contact a professional mechanic to diagnose and repair the automatic transmission.