External dimming

Spoiler

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 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 Measure voltage between relay carrier pin 5 and ground Ohmmeter on relay carrier pin 4 and ground Pull plug off the spoiler

Ohmmeter on spoiler plug pin 1 and relay carrier

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Tank level warning light

Brake pad warning light

Brake fluid warning light

Coolant warning light

Ohmmeter on spoiler plug pin 1 and relay carrier

Ohmmeter on spoiler plug pin 5 and ground Ignition on

Actuate drive link with F8 key (Off/On) Test:

Visual inspection: indicator light flashes Ignition on

Actuate drive link with F8 key (Off/On) Test:

Visual inspection: indicator light flashes Ignition on

Actuate drive link with F8 key (Off/On) Test:

Visual inspection: indicator light flashes 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

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

90 25 Diagnosis/Troubleshooting, instrument cluster

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