3315687 - E4010 INSTRUMENT PANEL - Functional description
Functional description
The instrument panel E50 is supplied directly by the battery at pin 14 connector A by the line from fuse F18 of B2. Panel E50 receives a second ignition-opeated supply (15/54) at pin 15 of connector A via fuse F6 and relay T1 of junction unit B2; pin 16 of connector A is earthed. Pin 13 of connector A receives ignition signal (AVV) from ignition H1: this signal - together with the rpm signal described later - are used to process 'engine running' information. The electronic speedometer receives a speedometer signal from ABS control unit M50 at pin 2 of connector B of E50. The speedometer signal is sent out again to the climate control system control unit M70, the navigator control unit M90 and the radio P20, from pins 5, 6, 7 of connector B, respectively.Functional description
A boot opening enablement signal is sent from pin 8 of connector B when the speedometer signal is less than 2 km/h See E3045 BOOT AND FUEL FLAP OPENING . The internal software also controls the milometer and trip meter. The electronic rev counter receives an rpm signal from engine management unit M10 at pin 4 of connector B of E50 . The handbrake switch I40 is connected to pin 19 connector C of E50 .(versions with VDC) or at pin 10 of connector C together with the insufficient brake fluid level signal.(versions without VDC). The brake fluid sensor K25 sends an earth signal to pin 10 of connector C to constantly light up the warning light but with an insufficient brake fluid level function. | The low brake fluid level and handbrake warning light also comes on upon a command from the ABS control unit, together with the 'ABS failure' warning light to indicate a fault in the EBD braking system. See E7020 ABS .. |