312002670 - INTRODUCTION - ENGINE

ATTENTION

All the operations should be carried out taking great care to avoid personal injury.The engine compartment contains many moving parts, components at high temperatures and live wires. Follow very carefully the warnings given below when working in the engine compartment: turn off the engine and wait for it to cool down, do not smoke, do not use naked flames and ensure a fire extinguisher is available.The use of special tools is required for certain procedures. The use of these tools is vital for working safely.Follow the current workshop safety regulations. Where necessary, the Manual contains specific procedures to be followed to prevent dangerous situations from arising.For the use of chemical products, follow the safety instructions on the card from the supplier to the consumer.The electronic ignition system produces voltages of 20,000 V and above which could be very hazardous to people especially if they are suffering from a heart condition. Therefore take great care when working on these systems or in the vicinity of their components.

WARNINGS

All the operations should be carried out taking great care to avoid damaging components.To release parts that are sticking, tap gently using an aluminium or lead hammer if iron materials are involved; use a wooden or resin hammer for light alloy parts.When dismantling, check that components that should be marked have the appropriate references.When refitting, lubricate the parts, where necessary, to prevent seizing or binding during the initial operating period. When refitting it is vital to respect the adjustment nut tightening torques.Each time they are refitted, replace gaskets, oil seals, flexible washers, safety washers, self-locking nuts, pre-treated screws and all parts that have deteriorated.Use adhesive paper or clean cloths to suitably protect those parts of the engine which, if they remain uncovered after dismantling, will allow dust or foreign bodies to enter.Only genuine spare parts should be used to replace units or components that have been removed: this is the only way of ensuring the interchangeability and perfect operation of the various components.Before working on the electrical system (connectors, electrical components, wiring, etc.) turn the ignition key to STOP and disconnect the battery.

Phonic wheel irregularity learning procedure

This procedure is only available for the EOBD versions. This allows the ECU to self-learn the phonic wheel irregularities due to constructive dispersions in order to be able to carry out an effective Misfire diagnosis.The procedure is repeated in the following cases:1) Repair / Replacement of the Phonic Wheel2) Repair / Replacement of the Rpm Sensor3) Repair / Reprogramming of the ECU

To carry out this procedure it is necessary to:

• connect the tester;
• with the engine turned off, turn the ignition key to the MAR position;
• follow tester instructions for this procedure;
• at the end of the operation, turn the ignition key to the OFF position and wait for the data to be stored.

Throttle body features self-learning procedure

This procedure should be carried out when Technical Assistance substitutes the throttle body or when the ECU is moved to a different vehicle from the one that had carried out a correct learning.

If a car is put in circulation before a correct learning of the throttle body features has been carried out, it may well incur the following problems:

• Safety problems for the vehicle and driver;
• Possibility of incorrect diagnosis for all components linked to the throttle body and the throttle position control;
• Poor steering;

To carry out this procedure it is necessary to:

• connect the tester;
• with the engine turned off, turn the ignition key to the MAR position;
• follow tester instructions for this procedure;
• at the end of the operation, turn the ignition key to the OFF position and wait for the data to be stored.