For 1990-2009 cars

#### Intelligent Switching Unit (ISU)

Scan Tool Parameter | Data List | Units Displayed | Typical Data Value
--- | --- | --- | ---
Door Switch | Central Locking | Open/Closed | Closed
Driver Door Switch | Central Locking | Released/ Applied | Applied
Hazard Lamp Switch | Lighting Data | On/Off | Off
Hood Open Switch | Central Locking | Active/Inactive | Inactive
Ignition 1 | Miscellaneous Inputs | Off/On | On
Ignition 2 | Miscellaneous Inputs | Off/On | On
Left Turn Signal Switch | Lighting Data | Active/Inactive | Inactive
Parking Lamps | Lighting Data | On/Off | Off
Right Turn Signal Switch | Lighting Data | Active/Inactive | Inactive
Tamper Status | Central Locking | Active/Inactive | Inactive
Trunk Open Switch | Central Locking | Open/Closed | Closed