Drive Links

Instrument cluster diagnosis

Drive links
The following drive links are actuated in the menu item Drive links. Their functioning must be checked when doing this.

Lamp dimming
- Ignition on
- Actuate drive link with F5 (On), F6 (Off) and F8 (Stop) keys

Test:
Visual inspection: display dims
If the display does not dim, replace the instrument cluster

Gear display dimming
- Ignition on
- Actuate drive link with F5 (On), F6 (Off) and F8 (Stop) keys

Test:
Visual inspection: display dims
If the display does not dim, replace the instrument cluster

Display dimming (background)
- Ignition on
- Actuate drive link with F5 (On), F6 (Off) and F8 (Stop) keys

Test:
Visual inspection: display dims
If the display does not dim, replace the instrument cluster

External dimming
- Ignition on
- Actuate drive link with F5 (On), F6 (Off) and F8 (Stop) keys

Test:
Visual inspection: display dims
If the display does not dim, replace the instrument cluster

Spoiler
- Ignition on
- Actuate drive link with F5 (On), F6 (Off) and F8 (Stop) keys

Test:
Visual inspection: spoiler extended / retracted?

If not:
- Check fuse D 8
- Check "extend spoiler" and "retract spoiler" relays
- Pull off relays
- Connect ohmmeter to terminals 85 and 86
Ohmmeter display: approx. 75 Ohms

- Measure voltage between relay carrier pin 5 and ground
Voltmeter display: Battery voltage

- Ohmmeter on relay carrier pin 4 and ground
Ohmmeter display: < 5 Ohms

- Pull plug off the spoiler
- Ohmmeter on spoiler plug pin 1 and relay carrier (extend spoiler) pin 3
Ohmmeter display: < 5 Ohms

Ohmmeter on spoiler plug pin 1 and relay carrier (retract spoiler) pin 3
Ohmmeter display: < 5 Ohms

Ohmmeter on spoiler plug pin 5 and ground
Ohmmeter display: < 5 Ohms

Tank level warning light
- Ignition on
- Actuate drive link with F8 key (Off/On)

Test:
Visual inspection: indicator light flashes

Brake pad warning light
- Ignition on
- Actuate drive link with F8 key (Off/On)

Test:
Visual inspection: indicator light flashes

Brake fluid warning light
- Ignition on
- Actuate drive link with F8 key (Off/On)

Test:
Visual inspection: indicator light flashes

Coolant warning light
- Ignition on
- Actuate drive link with F8 key (Off/On)

Test:
Visual inspection: indicator light flashes

Spoiler warning light
- Ignition on
- Actuate drive link with F8 key (Off/On)

Test:
Visual inspection: indicator light flashes

Washer fluid warning light
- Ignition on
- Actuate drive link with F8 key (Off/On)

Test:
Visual inspection: indicator light flashes

Tachometer
- Ignition on
- Actuate drive link with F5 (On), F6 (Off) and F8 (Stop) keys

Test:
Visual inspection: the tachometer deflects from zero position to end position (stepper motor check)

Analog speedometer
- Ignition on
- Actuate drive link with F5 (On), F6 (Off) and F8 (Stop) keys

Test:
Visual inspection: the analog speedometer deflects from 0 to 250 km/h (stepper motor check)

Coolant temperature
- Ignition on
- Actuate drive link with F5 (On), F6 (Off) and F8 (Stop) keys

Test:
Visual inspection: the display rises from 40 °C to 120 °C

Tank display
- Ignition on
- Actuate drive link with F5 (On), F6 (Off) and F8 (Stop) keys

Test:
Visual inspection: the display moves from 1/4 to 4/4

Display segments
- Ignition on
- Actuate drive link with F8 key (Off/On)

Test:
Visual inspection: all display segments are switched on

Gear display
- Ignition on
- Actuate drive link with F8 key (Off/On)

Test:
Visual inspection: gear display illuminated

Key buzzer
- Ignition on
- Actuate drive link with F8 key (Off/On)

Test:
Noise inspection: warning signal emitted

Light buzzer
- Ignition on
- Actuate drive link with F8 key (Off/On)

Test:
Noise inspection: warning signal emitted

Variable buzzer (v)
- Ignition on
- Actuate drive link with F8 key (Off/On)

Test:
Noise inspection: warning signal emitted

Speed buzzer
- Ignition on
- Actuate drive link with F8 key (Off/On)

Test:
Noise inspection: warning signal emitted

Belt buzzer (USA)
- Ignition on
- Actuate drive link with F8 key (Off/On)

Test:
Noise inspection: warning signal emitted