3234331 - E4021 SPEEDOMETER - Description (VDC)

Description

The module includes:

• electronic speedometer;
• milometer and trip meter / outside temperature gauge; and a series of warning lights.

The speedometer signal comes from the ABS control unit; there are three 'repeater' outputs of the signal for other systems; only two are used for the electronic fuel injection and climate control system. The gauge display is produced by an electronic circuit inside the module.The milometer consists of an LCD which simultaneously displays the total and trip mileage.A special button zeros the trip meter.The button is on the left of the instruments, together with the instrument light adjustment button and the headlamp alignment control. .

The following warning lights are contained in this module:

• brake pad wear
• 'VDC/ASR failure/on'
• 'ABS failure'
• 'insufficient brake fluid level/handbrake applied'
• 'EOBD function'

The electronic circuits inside the module also manage the test function for the warning lights of all the modules .The operation of the warning lights which are not included in other functions is illustrated; the others are described and illustrated in the diagrams dealing with the components to which they refer.The speedometer operates when the ignition is switched ON. In the 'night' position (side lights on), the brightness can be adjusted to three levels by an external button.  See E2530  INSTRUMENT LIGHTING

for versions without the VDC option, refer to the specific wiring diagram