Caja De Cambios Al4

Páginas: 35 (8605 palabras) Publicado: 10 de diciembre de 2012
CITROËN

TECHNICAL
TRAINING

PRESENTATION OF THE AL4
AUTOMATIC TRANSMISSION

CITROËN UK LTD
221 BATH ROAD
SLOUGH SL1 4BA

_________________
DEALER PERSONNEL
DEVELOPMENT AND
TRAINING

_________________
© CITROËN UK LTD. Reproduction whether partial or in full without
written permission from Citroën UK Ltd is forbidden

PDF created with pdfFactory trial versionwww.pdffactory.com

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
© AUTOMOBILES CITROËN Toute reproduction ou traduction même partielle sans l'autorisation écrite d'AUTOMOBILES...
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