Transmission With Hydraulic Regulation -E18/2-, Output Diagnostic Test Mode (DTM)
Transmission with hydraulic regulation -E18/2-, Output Diagnostic Test Mode (DTM)^ The Output Diagnostic Test Mode is a part of the electrical test. The Output Diagnostic Test Mode checks the solenoid valves, the shift lock solenoid, the kick-down switch and the relay for the solenoid valves.
^ The Output Diagnostic Test Mode can only be performed when the selector lever is in position "P", the engine is not running and the vehicle is stationary.
^ The Output Diagnostic Test Mode will be terminated if the engine is started.
^ The function of the solenoid valves 1 -N88-, 2 -N89-, 3 -N90- and the solenoids for the selector lever lock are checked acoustically during the Output Diagnostic Test Mode. Avoid noise in the surrounding area during the acoustic check, because the switching noise (clicking) of the final controls is very quiet.
^ The solenoid valves 4 -N91-, 5 -N92-, 6 -N93- and 7 -N94- are activated during the Output Diagnostic Test Mode. A direct functional check of these valves is not possible. But possible electrical faults which occur during the activation, will be recognized by the On Board Diagnostic (OBD) and stored in the DTC memory.
^ When performing the Output Diagnostic Test Mode the individual final controls will be activated until the -> button is pressed.
^ Only one complete Output Diagnostic Test Mode is possible after switching the ignition on. To repeat the Output Diagnostic Test Mode the ignition must be switched off and on again.
Test sequence
- Connect scan tool V.A.G 1551 and enter address word "02 Transmission electronics" and advance until "Select function XX" appears in display
Indicated on display:
- Press keys 0 and 3. (03 selects the function "Output Diagnostic Test Mode").
Indicated on display
- Confirm entry with key Q.
Indicated on display:
Valve is activated (clicks), to move to next final control press -> key.
- If the valve does not click, perform electrical check. Electrical Check
Indicated on display:
Valve is activated (clicks), to move to next final control press -> key.
- If valve does not click, perform electrical check. Electrical Check
Indicated on display:
Valve is activated (clicks), to move to the next final control press -> key.
- If valve does not click, perform electrical check. Electrical Check
Indicated on display:
Solenoid is activated (clicks), to move to next final control press -> key.
- If solenoid does not click, perform electrical check. Electrical Check
Indicated on display:
Valve is activated (clicks), to move to next final control press -> key.
- If the valve is not activated, perform electrical check. Electrical Check
Indicated on display:
Valve is activated (clicks), to move to next final control press -> key.
- If valve is not activated, perform electrical check. Electrical Check
Indicated on display:
Valve is activated (clicks), to move to next final control press -> key.
- If valve is not activated, perform electrical check. Electrical Check
Indicated on display:
Valve is activated (clicks), to move to next final control press -> key.
- If valve is not activated, perform electrical check. Electrical Check
Indicated on display:
^ "Pressure regulating valve -5- for automatic transmission -N233-" could now be displayed erroneously due to a software error, even though it does not exist. Press -> button to switch over to next actuator.
Indicated on display:
^ Disregard display.
- Press -> key to advance to next final control.
Indicated on display
- Press -> key to terminate Output Diagnostic Test Mode.
Indicated on display:
To repeat the Output Diagnostic Test Mode the ignition must be switched off and then on again, then again select the function 03 - Output Diagnostic Test Mode.