Diagnosing the pushbutton selector
Call the ALADIN monitor (1) to diagnose the pushbutton selector.
Diagnosing the pushbutton selector
Press all buttons of the pushbutton selector one after the other (1).
Observe the message in ALADIN (2).
Cable connection and pin assignment of pushbutton selector
Checking according to the wiring diagram.
Check voltage difference between the pushbutton selector and the transmission controller.
The operating voltage difference measured against the respective ground potential of the controller must not exceed 5V.
Check plug connection.
Check the wiring if necessary.
Possibly replace the pushbutton selector or the ECU.
Controller interfaces to the pushbutton selector.
Wiring diagram – Controller interface to pushbutton selector
There are various versions of the wiring diagram for the pushbutton selector
All pushbutton selector variants have a starting lock, i.e. the engine can only be started if no button has been pressed (neutral position).
Wiring diagram pushbutton selector – E300.1 Wiring example 1
Wiring diagram pushbutton selector – E300.1 Wiring example 2
Wiring diagram pushbutton selector – E300.1 Wiring example 3
If the defective component cannot be clearly identified, you should try to reproduce the fault:
Reinstall the component in the vehicle
Test function
Read out the ALADIN monitors
After the fault has been eliminated, the following steps have to be carried out
Perform a test drive (→ ) with a function check.
Read out the fault memory
Check transmission for leaks
Perform a final visual inspection
NOTICE
Damage to the transmission controller due to overvoltage!
Turn the ignition off prior to installation or removal.
Never expose the on-board electrical wiring to higher voltages than 45 V.
Do not touch any contacts to avoid ESD (electrostatic discharging) and soiling
Dismantle/replace the controller and send it to the Voith Customer Service for inspection.
Dismantle the controller
Unplug connectors A, B, C, D (connector secured by "lug", lift "lug")
Press the device backwards (I.) against the springs (1).
List the device out of the rail (2) upwards (II.).
Pull out the device.