3315686 - E4010 INSTRUMENT PANEL - Functional description (Right hand drive, Automatic transmission)

Functional description

The instrument panel E50 is supplied directly by the battery at pin 14 connector A from the MAXIFUSE CENTR line B5 and from fuse F18 of B1 . The instrument panel E50 receives a second supply controlled by the ignition (INT/A) at pin 15 of connector A via fuse F1 of junction unit B1 ; 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 - pin 22 - 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 6,7, and 8 of connector B, respectively. A boot opening enablement signal is sent from pin 9 of connector B when the speedometer signal is less than 2 km/h. (see E3045 BOOT 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 12 connector A of control unit M45 (electronic check device); the signal is sent, via pin 11 connector B, to pin 10 connector C to intermittently light up the handbrake applied warning light. 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. This warning light is also lit up by pin 21 of control unit M50 via pin 19 of connector C. Back window heater element enablement is sent from pin 20 of connector B if engine rpm exceeds 1000 rpm. (see E3030 rearscreen and rear view mirror demisting warning light).

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).

The brake pad wear warning light is controlled by a signal sent to pin 12 of connector C of E50 from one of two sensors K20 or K21 . The insufficient engine oil level warning light, pins 18 and 19 connector B of E50 , is connected to the sensor K32 (engine oil level). The wiring differs according to the engine type.

Functional description

The sensor is connected to module E50 via the front/engine coupling D4 pin 7 and 6 and the front/dashboard coupling D1 pins 9 and 3. Pins 19 and 20 of connector A of the instrument panel E50 receive the fuel level signal via pins 2 and 1 of the gauge N40 . The fuel gauge manages the lighting up of the warning light and sends a signal, via pin 17 connector C of E50 , to the control unit M10 pin 22 connector A.

Functional description

The low oil pressure warning light is controlled by a signal sent to pin 13 of connector C of E50 from sensor K30 . The seat belt warning light is controlled by a signal sent to pin 6 of connector A of E50 from switch I45 . The temperature gauge receives the signal at pin 15 connector C E50 from the temperature sensor K36 via the engine compartment/engine pre-wiring coupling D4 pin 3 and the dashboard/engine coupling D23 pin 9. A second maximum temperature signal is received from engine management unit M10 pin 19 at pin 10 of connector B of E50 and causes the warning light to come on via the indicator. The instrument panel is equipped with a self-diagnostic function. This data may be read by connecting the panel to connector R10 - pin 9: this receives signals from pin 1 of connector C of E50 via the tester line (see E8010 DIAGNOSTIC MULTIPLE CONNECTOR).