Test Point 13

Position switch on drive - Check triggering of actuators.

closed during activation Ground must be present at connectors T27 and T28, terminals 1

and 7, in the quiescent state.

Note

Positive voltage must be present at terminal 7 when the actuator is triggered in "open" direction.

Positive voltage must be present at terminal 1 when the actuator is triggered in "closed" direction. Check directly at actuators if required.

Note

The actuators are only triggered for several milliseconds.

Fault, fault code Possible causes, remedies, notes

- Check wires from alarm control unit plug I, terminals 11 and 12, to the acutators for continuity.

- Check position switch at actuator (refer to Test Point 4).

Test Point 14

Position switch on drive - Refer to Test Point 13. open during activation

Test Point 15

Radio (closed loop) - On radios that do not have this contact, radio 1 input is wired interrupted during activation t0 ground.

Check wire from alarm control unit plug II, terminal 13, for continuity to ground.

Test Point 16

Radio contact to ground during activation

- Check insulating strip on radio.

- Check wire from alarm control unit plug II, terminal 9, to radio plug, terminal 6, for short to ground.

- Check alarm contact at radio or bracket, respectively.

Test Point 17

Tailgate lock switch closed during activation

- Check rear cover unlocking switch.

- Check lock switch for rear cover unlocking mechanism.

- Check wiring from connector II, terminal 19, of alarm control unit to rear unlocking mechanism or lock switch of rear cover unlocking mechanism for short to positive.

Drive links

This function allows the following components to be triggered:

- Function display in lock buttons

- Alarm horn

- Turn signals

- Interior light

- Button light in central locking system button

- External output

Function display

1 = on

3 = off

Return :

N

If the function display is turned on, the doors are locked and the LEDs light up permanently. The „on" display flashes on the tester. If the function display is turned off again, the LEDs are turned off as well. The doors are unlocked again when the user returns to the menu.

Lock

1 = closed

3 = open

Return :

N

Lock closed: Doors are locked. Lock open: Doors are unlocked.

Alarm horn

1 = on

3 = off

Return:

N

Alarm horn on: Alarm horn is triggered continuously (continuous sound).

Turn signals

1 = on

3 = off

Return :

N

Turn signals on: All turn signals are triggered continuously (continously lit).

Interior light

1 = on

3 = off

Return:

N

The interior light must be in the door contact position.

Button light

1 = on

3 = off

Return:

N

Button light on: The light in the central lock system button is triggered.

External output

1 = on

3 = off

Return :

N

The external output is used to trigger other control units, e.g. ultrasonic monitoring of the interior.

Anti-drive-off

feature

1 = on

3 = off

Return :

N

Anti-drive-off feature on: Activation of DME control unit terminal 15 is interrupted. It must no longer be possible to start the engine.

Possible fault displays

No activation Door(s) open !

Return:

- Close doors

- Check door contact wires to alarm control unit plug II terminal 21 for short to ground.

No activation Engine running!

Return:

N

- Turn off engine, only switch on ignition.

- Turn off engine, only switch on ignition.

No response Signal implausible !

Return N

- Replace control unit.

No activation Fault summary!

Return: N

Note

Fault summary is displayed if several drive links (actuators) are triggered simultaneously, e.g. if turn signals are on while the function display is checked.

- Check wiring to alarm control unit plug I, terminals 8, 9, 10, 11, 12, and plug II, terminal 20, for short to positive.

- Wires to alarm control unit

Check connector li, terminal 24 and terminal 7 (if connected) for short to ground.

5.

No activation

Fault summary !

Position switch ?

Return:

- Also check position switch (refer to page D 90- 5).

Activation

correct.

Position switch?

Return:

N

- Check position switch

- Check position switch

No response Signal unplausible ! Position switch ? Return: N

- Replace control unit.

Unknown

response code !

Return :

N

- Check following ground points:

- Check following ground points:

vehicles: GP VII)

- 3. GP II: Body to alarm control unit 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

Door(s)

- open -

Return:

N

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.

Engine compartment - open -

Return: N

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.

Luggage compartment - open -

Return N

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.

Position switch

open: - closed -

closed: - open -

Return

N

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

Position switch open: - closed -closed: - closed -Return: N

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

Position switch open: - open -closed: - closed -Return: N

This display appears if both lock buttons are in the „closed" position. If required, check position switch (refer to page D 90 - 5)

5.

Central locking

system button

open -

Return:

N

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.

Glove compartment

- open -

Return :

N

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

7.

Radio

(closed loop)

- closed -

Return:

N

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.

Radio contact

- open -

Return :

N

If Radio contact closed is displayed:

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.

Tailgate lock

- open -

Return :

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 if tailgate lock is actuated.

Activate

button

- open -

Return :

N

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.

Deactivate

button

- open -

Return:

N

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.

Input 1

- open -

Return :

N

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.

Refer to item 12.

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.

If „present" is displayed although the engine is not running, this may be due to a summary fault (refer to item 4, Drive links functional group). 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.

Return : N

Refer to item 13.

15.

Speedo signal

present

Return:

N

16.

Term. 15

present

Return:

N

Input 2

- open -

Return :

Return : N

17.

Term. 61

present

Return:

Note

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

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