Fiat Bravo, Brava 1995-2001 Workshop Repair & Service Manual (COMPLETE & INFORMATIVE for DIY REPAIR) ☆ ☆ ☆ ☆ ☆
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MAKE: FIAT
MODEL: Bravo, Brava
YEAR: 1995 1996 1997 1998 1999 2000 2001
LANGUAGE: EN/IT
FORMAT: PDF
SIZE/PAGE: 383 MB (10,000+ Pages)
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This highly detailed workshop service repair manual for download contains virtually everything you will ever need to repair, maintain, rebuild, refurbish or restore Fiat Bravo, Brava 1995-2001. All diagnostic and repair procedures and gives you access to the same information that professional technicians and mechanics have. You can view and print out the complete repair procedures with this workshop service repair manual Download – you do not need to be skilled with a computer.
EXCERPTS:
HITACHI INTEGRATED INJECTION/IGNITION SYSTEM
Introduction
The Hitachi system fitted on the Bravo-Brava with the 1747 i.e 16v engine belongs to the category of static advance digital electronic ignition systems integrated with multiple phased type intermittent electronic fuel injection systems.
This system therefore has only one control unit, one set of wiring and one set of common sensors for both systems.
The integrated system can be summarized in the following sub systems:
ELECTRICAL/ELECTRONIC CIRCUIT
AIR INTAKE CIRCUIT
FUEL SUPPLY CIRCUIT
EMISSION CONTROL DEVICES
The system is capable of detecting the following parameters via special sensors:
1 . the engine rotation speed;
2. the position of each pair of pistons in relation to TDC for cylinder 1;
3. the engine intake air flow rate;
4. the position and the speed of the variation of the position of the accelerator butterfly;
5. the temperature of the engine coolant;
6. the effective strength of the mixture (through the Lambda sensor signal);
7. the presence of detonation;
8. the speed of the vehicle;
9. the battery voltage;
10. whether the climate control compressor is switched on.
This information, usually of an analogue type, is converted into digital signals by analogue/digital (A/D) converters in order to be able to be used by the control unit.
In particular, any engine operating point is detected, moment by moment, by two parameters:
– the engine rotation speed, measured in revolutions per minute (rpm);
– the engine load, which is constituted by the quantity of air drawn in by each cylinder.
This quantity is calculated on the basis of the flow rate of the air drawn in and is represented by the parameter TP, measured in milliseconds (ms).
Inside the control unit memory there is a management program (software) which comprises a series of strategies, each of which manages a precise system control function.
By using the (input) information listed previously, each strategy processes a series of parameters, based on the data maps stored in the control unit memories and then controls the system (output) actuators which are the devices which allow the engine to operate, namely:
1. injectors;
2. ignition coils;
3. solenoid valves implementing various functions;
4. fuel pump;
5. control relays.
NOTE The HITACHI injection/ignition system does not require any adjustment as it is self-regulating and self-adjusting.
NOTE In the diagrams, the numbers indicate the corresponding HITACHI engine control unit pins.
NOTE All the connectors are seen from the side opposite the cable input.