16F Technical Information.pdf

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Translated by: Arse Errors + Omissions Excepted
Date: 18/05/2005
Marelli Weber 16F Technical Information
Purpose of The Guide
To supply information on the operation of the electronic control unit (single point
injection with static ignition) – IAW 16F and variants.
Defining the methods used to verify which component is faulty:
Point 1 – System Constitution
Point 2 – Operation of the System
Point 3 – Verifying functionality of individual defective components
Appendix 1 – Diagnostic Parameters of the system
Document Amendments
Amendment Date
Description
-
Nov 1992 Edition 1 - New
A
Sept 1993 Models list updated.
Text on 3.1 and 3.2 corrected
See Appendix 1
B
June 1997 Appendix 1 amended to carry immobilizer information for
IAW 16F.
Corrected §A for model extensions
C
Oct 1997 Modernised with respect to 6F models,
System Outline updated
Text in 3.2.1 and point 1.2.3 and title of Appendix 1
amended
--
Nov 1997 Edition 2 – Diagnostic Protocol in Appendix 1 amended
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Translated by: Arse Errors + Omissions Excepted
Date: 18/05/2005
§A - Applicable Models
CAR MODEL
NOTES
ISO CODE
MANF. CODE SUPP. CODE
Cinquecento 899 SPI ECE F2
DO 85 85 94 43
46475180
61602.072.02
Cinquecento 1108 SPI ECE
F2
DO 85 86 94 C4
46475181
61602.068.05
Panda 899 SPI ECE F2
DO 85 89 94 C7
46475176
61602.083.02
Panda 1000 SPI ECE F2
DO 85 08 94 46
46475177
61602.071.02
Panda 1108 4x4/4x4 ECE F2
DO 85 8A 94 C8
46475178
61602.070.02
Panda 1108 SPI CA ECE F2
DO 85 0B 94 49
46475179
61602.069.02
Punto 55 1.1 SPI 5M/6M
ECE F2
DO 85 02 94 40
46480662
61602.102.00
Punto 60 1.2 SPI CM ECE F2
T.i.T.
DO 85 04 94 C2
46475175
61602.075.04
Punto Selecta 1.2 SPI ECE
F2
DO 85 07 94 45
46467014
61602.079.03
Punto 1.1 SPI Em.04 "East
Europe"
DO 85 01 94 BF
7787315
61602.058.01
Lancia Y "Young" 1.1 SPI
ECE F2
DO 85 02 94 40
46480662
61602.102.00
Lancia Y 1.2 SPI CM ECE F2
See Point 1.2 of the
attached Appendix 1
D0 85 8F 15 CE
46448299
61602.074.02
Lancia Y 1.2 SPI CA ECE F2
DO 85 10 15 4F
46448300
61602.073.02
Palio 1108 SPI Em.04 95 RON
"Turkey"
Under Development
46463848
61602.091 .AA
Palio 1108 SPI Em.04 91 RON
"South Africa"
Under Development
46463849
61602.092.AA
Palio 1108 SPI Em.04 90 RON
"Morocco"
Under Development
46463850
61602.093.AA
Tipo 1372 SPI ECE 04
(TOFAS)
DO 85 91 16 51
46462900
61602.078.00
Tipo/Tempra 1.6 SPI USA'83
(TOFAS)
D0 85 0E 15 CD
46416940
61602.067.01
Tipo/Tempra 1.6 SPI Em.04
(TOFAS)
D0 85 8C 15 CB
46425974
61602.085.01
131 Bn/Sw1.6SPI USA'83
(TOFAS)
DO 85 92 16 52
46480845
61602.077.AA
Seicento 899 cc. SPI F2 Base
Under Development
46467015
61602.095.AA
Seicento 899 cc. SPI F2
Electronic Clutch
Under Development
46467016
61602.096.AA
Seicento 1108cc. SPI F2
Base + Condizione.
Under Development
46467017
61602.097.AA
NOTE: For vehicles in development or with undefined ISO Codes, use the IAW 16F Family ISO Code: 55-
DO-85-80-80-2A.
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Translated by: Arse Errors + Omissions Excepted
Date: 18/05/2005
1
System Constitution
The system is constituted from the following members, their characteristics
are in the following data sheets:
Number
Part
Document
1
ECU
CAP. 9.93240/01
2
ECU Wiring Loom
CAP. 9.95209/02
3
ECU System Warning Lamp
4
Test Instrumentation
5
Spark Plug
CAP. 9.92120
6
Ignition Coils
CAP. 9.93207
7
Idle Control Valve
CAP. 9.93239
8
Injector
CAP. 9.93231
9
Air Temperature Sensor
CAP. 9.93225
10
Water Temperature Sensor
CAP. 9.93225
11
Throttle Position Sensor
CAP. 9.93228/02
12
Manifold Absolute Pressure (MAP) Sensor CAP. 9.93241
13
Oxygen (Lambda) Sensor
CAP. 9.93233/50
14
RPM / TDC Sensor
CAP. 9.93206
15
Charcoal Canister
CAP. 9.92605
16
Fuel Pump Relay
CAP. 9.92210
Translated by: Arse Errors + Omissions Excepted
Date: 18/05/2005
System Outline
M. Marelli 16F Family ECU system:
Key
1. ECU
2. Diagnostics Socket
3. RPM / TDC Sensor
4. TDC Sense Pulley (60 – 2 teeth)
5. Ignition Coils
6. Spark Plugs
7. Throttle Position Sensor
8. Idle Control Valve
9. Coolant Temperature Sensor
10. Manifold Absolute Pressure (MAP) Sensor
11. Lambda Sensor
12. Fuel Pressure Regulator
13. Relay
14. Relay
15. Air Temperature Sensor
16. Throttle Body
17. Fuel Vapour Release Valve
18. Charcoal Canister
19. Fiat-Lancia Tester or Equivalent
20. Fuel Filter
21. Multifunction Valve
22. Fuel Tank
23. Fuel Pump
24. ECU System Warning Light
25. Catalytic Converter
26. Fuel Injector
27. Ignition Amplifier
28. Battery
29. Butterfly (In Throttle Body)
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Translated by: Arse Errors + Omissions Excepted
Date: 18/05/2005
2
OPERATION OF THE SYSTEM
The “IAW 16F” electronic control unit controls the ignition and the fuelling of the motor using closed
loop “SPEED DENSITY” sensing.
2.1
Ignition
The ECU fires two ignition coils alternately, using the wasted spark principle. The rate of firing and
ignition advance is dependent on absolute pressure (of intake charge) and engine speed.
The amount of ignition advance is calculated the using absolute pressure of the air in the inlet
manifold, the engine speed and the amount of cut-off before TDC.
The ignition advance is variable, dependent on the following factors:
· Coolant Temperature
· Variation of Engine Speed
· Variation of Manifold Absolute Pressure
2.2
Fuelling
The ECU calculates the exact amount of fuel to send to the motor based on its speed and the absolute
pressure in the manifold, carrying out corrections based on the air temperature, coolant temperature, throttle
position and the feedback given from the lambda sensor for all fields of engine operation.
· Synchronous (used in conditions of normal operation of the motor);
· Asynchronous (used in specific (error) conditions).
These operating methods work together to manage the fuelling in all conditions: fuel cutting at high rpm
(cut-off), idle control, management during transitions, correcting running conditions according to water
temperature, air temperature, battery voltage, emissions control.
The ECU also controls the operation of the pump fuel (determining the amount of fuel to add in if the
engine speed does not exceed a prefixed threshold in a prescribed time, or in case of emergency) and the
Idle Control Valve.
2.3
Emissions
The ECU works to ensure one amount of the air-fuel mixture burns at the stoichiometric ratio in all the
working conditions, aiming to ensure correct and long-lasting operation of the catalytic converter; the
system alters itself to take into account the age of the engine and fuel quality
The system also controls the amount of fuel vapour in the exhaust and inlet by using the charcoal canister
to redirect unburnt fuel into the inlet manifold, thusly, avoiding large variations of the mixture inside it.
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