Electricand Electronic Systems

The Body Computer Node (fitted in the dashboard underbody on thesteering wheel side) is composed of an electronic section and a electromechanical section (CPL) which are interconnected and constitute a single set (Dashboard Node). Both the electronic and the electromechanical sections perform interconnecting functions with the system and have fixed connectors for the link to the front, rear and dashboard wiring. The electromechanical section contains the fuses and the remotecontrol switches while the electronic section contains an EOBD fixed connector (J1962-compliant) capable of carrying out diagnoses of the Engine Control Node and the systems not connected on the line B-CAN via the K LINE and diagnoses of the nodes connected to the B-CAN line via this latter.

The Body Computer sets up a two-way gateway between the C-CAN/ B-CAN networks.

The connectors for the links with the front and rear wiring (andwith the EOBD) are accessible from the front (fuses side) while those for the linkswith the dashboard wiring are located on the opposite side.

IntroductiontoMaserati

BODY COMPUTER NODE (NBC)

Electricand Electronic Systems

The electronic section of the Body Computer Node performs the following functions:

•It receives and transmits information on the B-CAN (e.g.: diagnosis, warning lights , commands, data) and C-CAN lines (e.g. warning lights, control signals, data)

•It receives and transmits information on the two-way A-BUS serial line for the alarms, windscreen wipers, twilight sensor

•It interconnects with the front and rear dashboard wiring

•It enables the diagnosis interfacing (J1962-compliant joint)

•It is connected to the CPL to measure the power supplies/ read signals and to operate the remote control switches

•It manages the Immobilizer / remote control / alarm (in the event of disconnection of the CAN line), recovery is enabled via the W line to the enginecontrol node

•Configuration of vehicle’s electronic systems (stored at line end)

•Vehicleaccess (doorlock/unlock)

•Internal/ externallightsmanagement

•Headlightwashers

•SPORT buttonmanagement

TYRE PRESSURE NODE (NTP)

The NTP manages the tyretemperature and pressure information.

It acquires the tyrecondition data and the calibration request via B-CAN

AUTOMATIC GEARBOX NODE (NCA)

The automatic gearbox node positioned inside the gearbox (lower part) controls the information through the following networks:

•C-CAN (data transfer withother vehiclesystemsand diagnostics)

It controls the following functions:

•Tachometric input signal and engine torque from Engine control node (NCM)

•Receives the commands from the gearshift lever by means of an integrated position sensor.

•It receives information from the various driver commands from the Body Computer over the B-can line.

Diagnostics

Diagnostics

OBD-II / EOBD connector

The 16-pin diagnosticconnectorisstandardisedin accordancewithOBD-II / EOBD standards(forEurope: fromEURO 3 onward). The first Maserati withthe 16-pin OBD-II / EOBD connectorwasthe 3200GT of 1998. Forvehicles withFlorenceelectronic architecture(M139 and M145), the ODB-II / EOBD connectorislocatedon the Body Computer. The diagnosticconnectoristhe interface betweenthe tester (SD3) and the variouscommunicationnetworks.

Quattroporte OBD-II / EOBD connectorpinout:

IntroductiontoMaserati

Diagnostics

Diagnostics

Quattroporte MY07 Automaticand Gran Turismo OBD-II / EOBD connectorpinout

In compliancewithISO / SAE standards, forall carsfromMY08 onward, ScanToolmust beavailableon the CAN line. Forthe Quattroporte fromMY07 and Automatic, and forthe Gran Turismo Maserati, a new pinoutassignmentforthe OBD-II / EOBD connectorhas beenintroduced. Thismakesitnecessarytousea new "SwitchMatrix" diagnosticcable.

AlldiagnosticsforcarswithFlorencearchitectureare performedwiththe SD3 tester!