2006 - Fiat Auto S.p.A.
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For complete and up-to-date technical information written for servicing purposes, see
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Fiat Auto S.p.A. INSTRUCTOR’S OUTLINE
M20 AUTOMATED GEARBOX
Parts & Services
Training Academy
3 / 56 © 2006 Fiat Auto S.p.A. – All rights reserved
CONTENTS
1. BRIEFING ..................................................................................................................................................... 5
1.1 INTRODUCTION.......................................................................................................................................... 5
1.2 GENERAL .................................................................................................................................................... 5
2. CHARACTERISTICS.................................................................................................................................... 7
2.1 LAYOUT OF GEARBOX.............................................................................................................................. 7
2.2 COMPONENTS OF THE ELECTROHYDRAULIC KIT................................................................................ 8
Power unit....................................................................................................................................................... 9
Solenoid valve unit ....................................................................................................................................... 10
Clutch actuator ............................................................................................................................................. 11
Mechanical unit (gear selector) .................................................................................................................... 13
How the gear selector works........................................................................................................................ 14
Electronic control unit ................................................................................................................................... 14
Electronic control unit ................................................................................................................................... 15
Input signals ................................................................................................................................................. 18
Output signals............................................................................................................................................... 18
User interface ..........................................................................
6.1 DESCRIPTION........................................................................................................................................... 30
6.2 SYSTEM BEHAVIOUR WITH THE VEHICLE STATIONARY AND THE ENGINE OFF............................. 30
Opening the door.......................................................................................................................................... 30
Behaviour before the key is turned on ......................................................................................................... 30
6.3 KEY ON (+15) ............................................................................................................................................ 31
6.4 SYSTEM BEHAVIOUR WITH THE ENGINE RUNNING AND/OR THE VEHICLE IN MOTION................. 31
Start-up (+50) ............................................................................................................................................... 31
Starting the vehicle when stationary ............................................................................................................ 32
Changing gear with the vehicle in motion .................................................................................................... 32
Engine started .............................................................................................................................................. 32
6.5 CHANGING GEAR WITH THE VEHICLE IN MOTION............................................................................... 33
Changing gear in manual mode................................................................................................................... 33
Changing gear in automatic mode ............................................................................................................... 33
ECO/ NORMAL Logic .................................................................................................................................. 34
6.6 REQUESTING NEUTRAL WITH THE VEHICLE IN MOTION................................................................... 34
6.7 REQUESTING REVERSE GEAR WITH THE VEHICLE IN MOTION........................................................ 35
6.8 SYSTEM SAFETY DEVICES..................................................................................................................... 36
7. CHARACTERISTIC DATA ......................................................................................................................... 37
7.1 GEAR RATIOS........................................................................................................................................... 37
7.2 FLUIDS AND LUBRICANTSI ..................................................................................................................... 38
7.3 AUTOMATED GEARBOX CONTROL UNIT.............................................................................................. 38
7.4 GENERAL SYSTEM FEATURES .............................................................................................................. 38
8. PROCEDURES.............................................
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