Input Signals

This function allows the following input signals to be checked:

- Door contacts

- Engine compartment switch

- Luggage compartment switch

- Position switches at drive motors

- Central locking system button

- Glove compartment button

- Radio closed loop

- Alarm contact radio bracket

- Tailgate lock button

- Microswitch for activation of alarm

- Microswitch for deactivation of alarm

- Input 1 (auxiliary system)

- Input 2 (auxiliary system)

- Input 3 (auxiliary system)

- Speedo signal

- Term. 15

- Term. 61

1.





Open is displayed if at least one door is open. Closed is displayed if both doors are closed. If required, check wiring to alarm control unit for open circuit or short to ground according to wiring diagram.

2.





Open is displayed if engine hood is open. Closed is displayed if engine hood is closed. If required, check wiring to alarm control unit for open circuit or short to ground according to wiring diagram.

3.





Open is displayed if tailgate is open. Closed is displayed if tailgate is closed. If required, check wiring to alarm control unit for open circuit or short to ground according to wiring diagram.

4.





This display appears if both lock buttons are in the "open" position.

4a.





This display appears if one lock button is in the "open" and one lock button is in the "closed" position.

4b.





This display appears if both lock buttons are in the "closed" position. If required, check position switch, Test Point 4

5.





Open is displayed if the central locking system button has not been pressed down. Closed display appears if the central locking system button is pressed down.

6.





Open is displayed if glove compartment is open. Closed is displayed if glove compartment is closed.

7.





The closed loop must be closed. On radios that do not have this contact terminal, terminal 13, plug II, is wired to ground.

- If the closed loop is open, check wiring from alarm control unit, terminal 13, to ground point V or to radio for open circuit.

8.





If Radio contact closed is displayed:

- Check insulating strip on radio.

- Check wiring from alarm control unit plug II, terminal 9, to alarm contact at radio bracket or to alarm contact at CD player for short to ground.

9.





Note: The spare key is needed for the checks acc. to items 9 to 11 since the ignition must be engaged during the check.

Open is displayed if tailgate lock has not been actuated. Closed is displayed it tailgate lock is actuated.

10.





Use the spare key to turn the locks of the driver and passenger doors in the "closing" direction. The display must switch from open to closed.

- If closed is displayed in the off position, check wiring from lock cylinders to alarm control unit plug II, terminal 1, for proper grounding according to wiring diagram.

- If display remains in the open position after the lock cylinders have been actuated, check wiring for continuity according to wiring diagram.

11.





Use the spare key to turn the locks of the driver and passenger doors in the "opening" direction. The display must switch from open to closed.

If closed is displayed in the off position, check wiring from lock cylinders to alarm control unit plug II, terminal 2, according to wiring diagram for short to ground.

If display remains in the open position after the lock cylinders have been actuated, check wiring for continuity according to wiring diagram.

12.





In the standard configuration, this input is not used. Auxiliary systems may be connected to this input.

Open is displayed if input is not used. If required, check auxiliary systems according to manufacturer's instructions.

13.





Refer to item 12.

14.





Refer to item 13.

15.





Display is not present if vehicle is stationary. Display is present if vehicle is moving. If required, check wiring from alarm control unit plug II, terminal 6, to speedometer according to wiring diagram.

16.





If display is not present, check wire from alarm control unit plug II, terminal 18, to central electrical system according to wiring diagram.

17.





Note: If "present" is displayed although the engine is not running, this may be due to a summary fault (refer to item 4, Drive links). In this case, start by remedying this fault.

If display is not present although the engine is running, check wire from alarm control unit plug II, terminal 23, to generator according to wiring diagram.