The following tests and component activations are possible using the HHT. Nominal values (function status) All door contacts including engine hood and trunk lid. Left front door lock switch (S86/1), right front door lock switch (S87/1), and trunk lid lock switch (S88/2) (arm/disarm ATA) (up to 01/94). Ignition. Service brake. Radio contact (running change during M.Y. 1996). Left front door actuator (S47).

		Test scope	Test connection	Test condition	Nominal value	Possible cause/Remedy
1.0		Circuit 15		Ignition: OFF Ignition: ON	OFF ON	23 1.0
2.0		Stop lamp switch (S9/1)		Ignition: ON Service brake applied not applied	ON OFF	22 9.0
3.0		ATA contact connector (radio) (X42/13) (running change during M.Y. 1996)		Radio installed, X42/13 connected Radio removed or X42/13 disconnected	ON OFF	23 10.0
4.0		Activation/deactivation of ATA via RCL on driver's door, passenger door or trunk lid or IR receiver in interior rear view mirror		IR transmitter pointed at vehicle: lock vehicle unlock vehicle	ON ON	23 2.0, 3.0, 4.0
5.0		Activation/deactivation of ATA via rotary tumbler lock on driver's door, passenger door or trunk lid (up to 01/94)		Using mechanical key at: passenger door (as of M. Y. 1997) lock vehicle unlock vehicle	ON ON	Vehicle uncoupled 23 2.0, 3.0, 4.0
6.0		Engine hood switch (S62)		Open engine hood Close engine hood	ON OFF	23 8.0
7.0		Left front door actuator (S47)		Vehicle unlocked Vehicle locked	OFF ON	23 12.0
8.0		Left/right door switch (S17/3, S17/4)		Both front doors closed Open driver's door Close driver's door Open passenger door	OFF ON OFF ON	23 6.0
9.0		Left/right rear door switch (S17/5, S17/6)		Both rear doors closed Open left rear door Close left rear door Open right rear door	OFF ON OFF ON	23 5.0
10.0		Trunk lid switch (S17/8)		Trunk lid closed open	OFF ON	23 7.0
11.0		Not applicable for U.S.A. vehicles	-	-	-	-
12.0		Not applicable for U.S.A. vehicles	-	-	-	-
13.0		Not applicable for U.S.A. vehicles	-	-	-	-
14.0		Not applicable for U.S.A. vehicles	-	-	-	-