Login Procedure, Engine Control Module (ECM)

Fig 1: Diagnostic System VAS 5051: Display

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Display on VAS 5051/5052:

Press selection -1- of vehicle system "01 - Engine electronics".
Wait until the next indication appears on display.

Fig 2: VAS 5051 Tester Displaying Control Module Identification And Coding

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Display on VAS 5051/5052:

1 - Control module identification of Engine Control Module (ECM).

2 - Control module identification of immobilizer

Press Δ - button

Fig 3: Diagnostic System VAS 5051: Display -- Basic Setting

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Display on VAS 5051/5052:

In selection -1-, select the diagnostic function "11 - Login-procedure".

Fig 4: Diagnostic System VAS 5051: Display - Display Group And Key Pad

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Display on VAS 5051/5052:

1 - Enter code word Max. input value = 65535

Enter 7-digit PIN (of Engine Control Module (ECM)) in button field -2-.
Press -Q- button to confirm input.

NOTE:

After the third incorrect input of the 7-digit PIN, the control module for anti-theft immobilizer or Engine Control Module (ECM) will be locked.
It is not possible to make another attempt for 10 minutes. During this time, the ignition must remain constantly switched on. On Board Diagnostic (OBD) must be exited using the "End Output" function 06. This time is doubled after every third consecutive incorrect attempt, up to a maximum of 255 minutes.

Fig 5: Diagnostic System VAS 5051: Display -- Basic Setting

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Display on VAS 5051/5052:

The Engine Control Module (ECM) is now switched free.

NOTE:

Fig 6: Diagnostic System VAS 5051: Display - Channel 21

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If indication -1- appears in display field: "Function unknown or cannot be performed at this moment", the 7-digit PIN was entered incorrectly (e.g. incorrect secret code)

NOTE:

Data is exchanged between individual control modules by means of a "bus" system.
"CAN-Bus" is used to describe a system that transports and distributes data.
The wires between the control modules that are used to transfer the data are known as signal wires.
These signal wires are used for serial transmission of data, i.e. data is sent to each of the connected control modules in turn.