WIRING DIAGRAM - CODE - Fiat GRANDE PUNTO 1.3 Multijet
COMPONENTS - CODE - Fiat GRANDE PUNTO 1.3 Multijet
| Component code | Description | Reference to the operation |
| B001 | JUNCTION UNIT | |
| B099 | MAXI FUSE BOX ON BATTERY | |
| C015 | DASHBOARD EARTH, DRIVER'S SIDE | - |
| E050 | INSTRUMENT PANEL | |
| H001 | IGNITION SWITCH | |
| M001 | BODY COMPUTER | |
| M010 | ENGINE MANAGEMENT ECU | |
| P091 | AERIAL FOR FIAT-CODE |
COMPONENT LOCATION - CODE - Fiat GRANDE PUNTO 1.3 Multijet
| Component code | Description | Reference to the operation |
| B001 | JUNCTION UNIT | |
| B099 | MAXI FUSE BOX ON BATTERY | |
| C015 | DASHBOARD EARTH, DRIVER'S SIDE | - |
| E050 | INSTRUMENT PANEL | |
| H001 | IGNITION SWITCH | |
| M001 | BODY COMPUTER | |
| M010 | ENGINE MANAGEMENT ECU | |
| P091 | AERIAL FOR FIAT-CODE |
DESCRIPTION - CODE - Fiat GRANDE PUNTO 1.3 Multijet
To increase protection against theft attempts, an engine immobilizer system known as the FIAT CODE is used.The CODE system only allows the engine to be started by means of the engine managementn control unit after a secret code, memorized previously, is received.The code used in the dialogue, that takes place via an aerial coaxial to the ignition switch, varies each time the engine is started (rolling code): therefore the code cannot be reproduced even using electronic scanners.The Code system control unit is incorporated in the Body Computer and also includes:- C CAN line for dialogue with the Body Computer and the engine management control unit;- electronic keys contained in a transponder with a secret code;- an aerial that reads the code contained in the transponder;- engine management control unit.The CODE allows the start of the engine management by the engine management control unit by means of a coded dialogue between the Body Computer and the engine management control unit during the stage prior to starting.After the key is turned to the ON position, the engine control unit sends a code request to the Body Computer which only responds after having recognized (via the aerial) a known transponder in the ignition switch.If the secret code in the answer is valid, the engine management control unit continues with the regular engine management activities, allowing the engine to be started up.If the transponder is not recognised, engine start-up is inhibited.Operation of the CODE is guaranteed if any of the other Body Computer functions are not working properly.The function also includes the display of the status by means of the CODE warning light in the instrument panel, connected via the CAN, coming on.The function also includes the display of the status by means of the CODE warning light in the instrument panel, connected via the CAN, coming on.
FUNCTIONAL DESCRIPTION - CODE - Fiat GRANDE PUNTO 1.3 Multijet
The CODE unit inside Body Computer M1 - connector G - is supplied directly from the battery from a line protected by maxifuse F2 of engine compartment control unit B1. It is ignition-operated (INT) at pin 32 of connector D. Pin 10 of connector H of M1 supplies a reference earth to the Body Computer.The CODE aerial P91 is connected by means of two cables to the CODE unit M1, at pins 1 and 16 of connector A; the aerial is positioned coaxially on the ignition switch in order to detect the key being inserted and turned.The key recognition communication and exchange of codes between Body Computer M1 and engine control unit M10 takes place via the C-CAN network.The Body Computer M1 is connected via the CAN line to the instrument panel E50 to manage the "CODE failure" warning light.
