Preparation for DTC Readout

The ASD control module (N30/2) features DTC memory which can store only one code in memory. The first recognized fault is stored in memory. The memory is not erased when the vehicle battery or ASD control module are disconnected. The DTC can be read via: the impulse counter scan tool, or the ASD MIL (A1e24) in the instrument cluster. 1. Connect impulse counter scan tool to data link connector (X11/4) according to connection diagram on following page. Note: Connect yellow wire from impulse counter scan tool to: ASD control module socket 5. 2. Engine: at Idle. 3. Read out DTC for ASD control module (N30/2), see section 0. To erase the DTC, Engine: at Idle.

Diagnostic trouble code (DTC)	Possible cause	Test step/Remedy 1)
	No fault in system.	In case of complaint: 23 and 33 (entire test)
	ASD control module (N30/2).	Replace N30/2.
	Stop lamp switch (S9/1).	23 6.0
	Left front axle VSS sensor (L6/1) or VSS from ABS control module, N30.	23 9.0
	Right front axle VSS sensor (L6/2) or VSS from ABS control module, N30.	23 10.0
	Rear axle VSS sensor (L6) or VSS from ABS control module, N30.	23 11.0
	No VSS from any sensor (L6, L6/1, L6/2).	23 9.0, 10.0, 11.0
	ASD valve (Y38) or stop lamp switch (S9/1).	23 7.0 23 8.0

1) Observe Preparation for Test, see 22.