Preparation for DTC Readout

1. Connect impulse counter scan tool or Hand-Held Tester (HHT) to data link connector (X11/4) according to connection diagram (see section 0). Note: Connect yellow wire from impulse counter scan tool to: ASD control module (N30/2) socket 9 BM (N16/1) socket 8. 2. Engine: at Idle. 3. Read out DTC's for ASD control module (N30/2). To erase DTC's, Engine: at Idle. Model 140 (06/92 ) ASD without pressure reservoir To activate the DTC memory of a new ASD control module (N30/2), see 12.

Equipment

Hand-Held Tester (HHT)

See S.I. in groups 58 and 99.

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 23 7.0
		Left front axle VSS sensor (L6/1) or from ABS control module (N30).	23 10.0
		Right front axle VSS sensor (L6/2) or from ABS control module (N30).	23 9.0
		Rear axle VSS sensor (L6) or from ABS control module (N30).	23 11.0
		No VSS from any sensor (L6, L6/1, L6/2).	23 9.0 23 10.0 23 11.0
		ASD valve (Y38) or stop lamp switch (S9/1).	23 6.0 23 7.0 23 8.0
		ASD without pressure reservoir (06/92 ) VSS (L6, L6/1, L6/2) 2)	Visually inspect

1) Observe Preparation for Test, see 22. 2) Rotor with incorrect tooth count, dirt accumulation on or damaged rotor, incorrect rear axle ratio, wrong wheel or tire size.