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