(1747) 16v

(1747) 16v

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HITACHI INTEGRATED INJECTION/IGNITION SYSTEM

• Introduction 1
• HITACHI injection/ignition system functional diagram 2
• Diagram showing information entering/leaving the HITACHI injection/ignition system control unit and sensors/actuators 3
• Location of HITACHI injection/ignition system components in the engine compartment 4

SYSTEM MANAGEMENT STRATEGIES

• Management of the signal 5
• Management of the injection 6
• Management of the FIAT-CODE anti-theft function 10
• Management of the ignition 11
• Management of the engine idle control 14
• Management of the charcoal filter 14
• Management of the modular manifold 14
• Management of the climate control system 15
• Management of the radiator fans 16

DIAGNOSTICS

• ELECTRICAL/ELECTRONIC CIRCUIT 19
• HITACHI system wiring diagram 20
• Sytem relays 21
• HITACHI system control unit pin-out 22
• HITACHI system control unit pin-out 23
• Engine rpm sensor 24
• Engine timing sensor 25
• Air flow meter 26
• Lambda sensor 27
• Butterfly position sensor 28
• Coolant temperature sensor 29
• Vehicle speed sensor 30
• Detonation sensor 30
• Ignition coil 31

AIR INTAKE CIRCUIT DIAGRAM

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INTAKE CIRCUIT

• Throttle body 33
• Engine idle speed adjustment actuator 34

FUEL CIRCUIT DIAGRAM

FUEL SUPPLY CIRCUIT

• Fuel drip tray assembly 36
• Fuel manifold 38
• Injectors 39
• Inertia safety switch 40

EMISSION CONTROL DEVICES

• Catayltic silencer 41
• Fuel anti-evaporation system 42
• Recirculation system for gases coming from the cylinder block/crankcase (blow-by) 44

CHECKS, ADJUSTMENTS AND REPAIR OPERATIONS ON THE HITACHI MPI SYSTEM

• Checking emission concentration 45
• Checking engine idle speed 46
• Ignition advance check 46
• Fuel supply circuit checks 47
• Fuel manifold and injectors 52
• Throttle body 53
• Adjustment of accelerator cable 54