Caja De Cambios Al4
TECHNICAL
TRAINING
PRESENTATION OF THE AL4
AUTOMATIC TRANSMISSION
CITROËN UK LTD
221 BATH ROAD
SLOUGH SL1 4BA
_________________
DEALER PERSONNEL
DEVELOPMENT AND
TRAINING
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© CITROËN UK LTD. Reproduction whether partial or in full without
written permission from Citroën UK Ltd is forbidden
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PDF created with pdfFactory trial version www.pdffactory.com
A
DOCUMENT SUMMARY
PRESENTATION OF THE
AL4 AUTOMATIC TRANSMISSION
The aim of this document is to give a brief description of the design and operation
of the electronically managed AL4 automatic transmission which offers precise,
adaptive control as well as excellent gear changing quality.
The following subjects aredealt with in this document:
- Presentation of the transmission and various pieces of information,
- The selector control,
- Lubrication,
- The converter,
- The mechanism,
- The ECU,
- Auto-diagnostics,
- The electrical circuit,
- Unit maintenance.
AL4 AUTOMATIC TRANSMISSION
© AUTOMOBILES CITROËN Toute reproduction ou traduction même partielle sans l'autorisation écrite d'AUTOMOBILESCITROËN est interdite et constitue une contrefaçon
PDF created with pdfFactory trial version www.pdffactory.com
B
CONTENTS
CHAPTER 1 : PRESENTATION - GENERAL .............................
PAGE 1
I-
INTRODUCTION..............................................................................
PAGE
1
II -
PRESENTATION.............................................................................
PAGE
2
III -
DESCRIPTION OF THE AL4 AUTOMATIC TRANSMISSION ..........
PAGE
3
IV -
IDENTIFYING THE COMPONENTS OF THE AUTOMATIC
TRANSMISSION..............................................................................
PAGE
5
V-
SPECIFICATIONS - SERVICING .....................................................
PAGE
7
VI -
LAYOUTOF THE AL4 AUTOMATIC TRANSMISSION ....................
PAGE
8
VII - MISCELLANEOUS ADVICE.............................................................
PAGE
9
CHAPTER 2 : SELECTOR CONTROL........................................
PAGE 11
I-
SELECTOR LEVER .........................................................................
PAGE 11
II -
PROGRAMSELECTOR...................................................................
PAGE 13
CHAPTER 3 : CHECKING THE OIL LEVEL ...............................
PAGE 15
CHAPTER 4 : THE TORQUE CONVERTER...............................
PAGE 17
I-
DESCRIPTION.................................................................................
PAGE 17
II -
CONVERTER LOCK-UP..................................................................
PAGE 18
CHAPTER 5 : THE EPICYCLIC GEAR TRAIN ...........................
PAGE 21
I-
DESCRIPTION.................................................................................
PAGE 21
II -
OPERATING PRINCIPLE ................................................................
PAGE 23
CHAPTER 6 :ECU.......................................................................
PAGE 27
I-
ECU FUNCTIONS............................................................................
PAGE 27
II -
OPERATING SUMMARY .................................................................
PAGE 31
III -
ECU CONNECTIONS ......................................................................
PAGE 33
CHAPTER 7 :AUTO-DIAGNOSTIC ............................................
PAGE 35
I-
FAULT WARNINGS .........................................................................
PAGE 35
II -
MEMORISED FAULTS / DOWNGRADED MODES..........................
PAGE 36
AL4 AUTOMATIC TRANSMISSION
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