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WIRING DIAGRAM - INSTRUMENT PANEL - Alfa Romeo 159 1.8 Da 01/06
COMPONENTS - INSTRUMENT PANEL - Alfa Romeo 159 1.8 Da 01/06
| Component code | Description | Reference to the operation |
| B002 | JUNCTION UNIT UNDER DASHBOARD | |
| B099 | MAXIFUSE BOX ON BATTERY | |
| C010 | LEFT FRONT EARTH | - |
| C020 | PASSENGER SIDE DASHBOARD EARTH | - |
| D001 | FRONT/DASHBOARD COUPLING | - |
| D029 | ENGINE CABLES/ENGINE SERVICES CABLE COUPLING | - |
| E020 | ANCILLARY INSTRUMENT | |
| E050 | INSTRUMENT PANEL | |
| H090 | SWITCH CONTROL PANEL | |
| I040 | HANDBRAKE SWITCH | |
| K020 | LEFT BRAKE PAD WEAR SENSOR (SWITCH) | |
| K021 | RIGHT BRAKE PAD WEAR SENSOR (SWITCH) | |
| K025 | BRAKE FLUID LEVEL SENSOR (SWITCH) | |
| K052 | ENGINE OIL LEVEL AND TEMPERATURE SENSOR | - |
| M001 | BODY COMPUTER | |
| M050 | ABS CONTROL UNIT | |
| M089 | STEERING LOCK CONTROL UNIT (NBS) | |
| N040 | FUEL PUMP AND LEVEL GAUGE |
COMPONENT LOCATION - INSTRUMENT PANEL - Alfa Romeo 159 1.8 Da 01/06
| Component code | Description | Reference to the operation |
| B002 | JUNCTION UNIT UNDER DASHBOARD | |
| B099 | MAXIFUSE BOX ON BATTERY | |
| C010 | LEFT FRONT EARTH | - |
| C020 | PASSENGER SIDE DASHBOARD EARTH | - |
| D001 | FRONT/DASHBOARD COUPLING | - |
| D029 | ENGINE CABLES/ENGINE SERVICES CABLE COUPLING | - |
| E020 | ANCILLARY INSTRUMENT | |
| E050 | INSTRUMENT PANEL | |
| H090 | SWITCH CONTROL PANEL | |
| I040 | HANDBRAKE SWITCH | |
| K020 | LEFT BRAKE PAD WEAR SENSOR (SWITCH) | |
| K021 | RIGHT BRAKE PAD WEAR SENSOR (SWITCH) | |
| K025 | BRAKE FLUID LEVEL SENSOR (SWITCH) | |
| K052 | ENGINE OIL LEVEL AND TEMPERATURE SENSOR | - |
| M001 | BODY COMPUTER | |
| M050 | ABS CONTROL UNIT | |
| M089 | STEERING LOCK CONTROL UNIT (NBS) | |
| N040 | FUEL PUMP AND LEVEL GAUGE |
DESCRIPTION - INSTRUMENT PANEL - Alfa Romeo 159 1.8 Da 01/06
The instruments currently on board the vehicle in question are composed of the main control panel located inside the steering wheel and a central instrument console in the middle of the dashboard. The main panel contains a large reconfigurable matrix LCD (HIGH version) or a negative contrast alphanumerical LCD (LOW version only).There is also a buzzer and a brightness sensor inside the instrument panel for the automatic adjustment (daytime/nightime) of the brightness of the instrument panel lights.The centre instrument console consists of:- fuel level gauge with reserve warning light- engine coolant temperature gauge with overheating warning light- engine oil temperature gauge with overheating warning lightThe instrument panel is a CAN node through which information is exchanged with the Body Computer and with the other electronic units.The centre module containing the three sets of instruments is not a B-CAN node, but is connected by means of a special serial line to the instrument panel node which sends the module all the signals necessary for the display of the required information.- Speedometer: the function of the speedometer includes displaying the vehicle speed in the instrument panel: this information comes from the ABS control unit, via the Body Computer.- Engine rpm: this function involves the display on the instrument panel of the engine rotation speed by means of the message sent via the CAN from the engine management control unit.- Milometer: the milometer function includes the display and memorizing of the total and trip mileage: the journey information is processed by the Body Computer by means of a counter; the special button in the panel to the side of the steering wheel zeroes the trip meter.- Fuel level: the Body Computer receives the signal from the sensor integrated in the pump assembly inside the fuel tank and processes it to guarantee suitable filtering/damping for the panel gauge, also managing the reserve warning light.- Engine oil level: the function signals the status of the engine oil level at starting (for about 3 seconds) in the display. The actual instrument panel operates a hot wire oil level sensor. If the oil level is below the minimum value, the message "minimum oil level" is also sent.- Engine coolant temperature gauge: is operated - via the instrument panel - by the special sensor on the engine. The maximum temperature warning light is controlled by a microprocessor when the value measured exceeds a certain limit.- Brake pad wear state: this function involves the specific warning light coming on: the Body Computer detects the brake pad wear status when braking (signal from the brake pedal) in a prolonged manner (occasional signals are ignored).- Handbrake applied: the warning light for the handbrake status is controlled by a specific switch; in addition, if a given speed level is exceeded in conjunction with this signal, a warning signal is activated: the signal is sent, via the CAN, from the Body Computer.- Insufficient brake fluid: this function involves the "insufficient brake fluid level" warning light in the instrument panel coming on with the signal sent by the Body Computer via the CAN.For more details
FUNCTIONAL DESCRIPTION - INSTRUMENT PANEL - Alfa Romeo 159 1.8 Da 01/06
The ignition-operated power supply (INT) for the instrument panel E50 reaches pin 1 of connector A via the line for fuse F37 of the junction unit under the dashboard B2; the direct power supply reaches pin 2 of connector A via the fuse line F53 of the junction unit under the dashboard B2; pin 7 of connector A is earthed (earth controlled by the Body Computer M1).The instrument panel E50 is connected from pins 3 and 4 of connector A with the Body Computer M1 and via the latter to the entire CAN: the signal reaches the electronic speedometer (from the ABS control unit M50) via the CAN: the same signal is replicated by pin 16 of M50 at pin 7 of connector A of the Body Computer M1.The electronic rev counter receives the engine rpm signal received from the engine management control unit M10 via the CAN.The km reset button for the trip meter, located in the left panel H90, sends an earth signal to pin 7 of connector C of E50.The fuel level gauge is controlled by means of signals coming from the level gauge located in the fuel pump assembly N40 - at pins 4 and 15 of connector D of the Body Computer M1 and from there via the CAN to the instrument panel E50.The brake pad wear warning light is controlled on the basis of the signal that reaches pin 23 of connector B of the Body Computer M1 from the sensors for K20 and K21.The insufficient brake fluid level/handbrake warning light is lit up by a signal from the handbrake switch I40 that reaches pin 14 of connector D of the Body Computer M1 or from the signal from the brake fluid level sensor K25 that reaches pin 18 of connector A of M1.All these signals are transferred via the CAN to the instrument panel E50.The engine oil level sensor, incorporated in the temperature and level sensor K52, receives a power supply from the panel E50 from pin 17 of connector B and relays the signal to pin 18.The engine oil temperature sensor K52 receives the reference earth from the panel E50 - pin 17 of connector D - and relays the signal to pin 18.The centre module E20 is connected by means of a special serial line - from pin 1 - to the instrument panel node E50 pin 1 of connector C; the protected power supply reaches pin 3 of E20, whilst the reference earth reaches pin 2.The dimmed power supply for the auxiliary instruments E20 leaves from pin 5 of connector C of E50.
