Citroen Technical Training ZF 4HP20 Automatic Transmission

The ZF4 HP20 automatic transmission is a totally electronically managed transverse automatic transmission, with four forward gears and one reverse gear and is aimed at the powerful engines fitted to the top of the range.

Auto-adaptive ECU used for managing the converter, gear changes and specific programs, the maximum torque capacity is 330 mN sealed transmission with reduced maintenance.

Contents:

• CHAPTER 1 : PRESENTATION - GENERAL
  • I - INTRODUCTION
  • II - PRESENTATION
  • III - DESCRIPTION
  • IV - IDENTIFICATION OF THE COMPONENTS OF THE TRANSMISSION
  • V - SPECIFICATIONS - MAINTENANCE
  • VI - TIGHTENING TORQUES
  • VII - LAYOUT OF THE 4HP20 AUTOMATIC TRANSMISSION
  • VIII - MISCELLANEOUS NOTES
• CHAPTER 2 : SELECTOR CONTROL
  • I - SELECTOR LEVER
  • II - PROGRAM SELECTOR
  • III - DISPLAY ON CONTROL PANEL
• CHAPTER 3 : LUBRICATION
  • I - LUBRICATION CIRCUIT
  • II - OIL GRADE
  • III - PERIPHERAL COMPONENTS
  • IV - CHECKING THE OIL LEVEL
  • V - DRAINING - REFILLING THE TRANSMISSION
• CHAPTER 4 : THE HOUSINGS
• CHAPTER 5 : THE TORQUE CONVERTER
  • I - DESCRIPTION
  • II - SPECIFICATIONS
  • III - LOCK-UP DEVICE
• CHAPTER 6 : THE FINAL DRIVE
  • I - DESCRIPTION
  • II - FUNCTION
  • III - PARK LOCK SYSTEM
• CHAPTER 7 : THE MECHANISM
  • I - INTRODUCTION
  • II - THE EPICYCLIC GEAR TRAIN
  • III - BRAKES AND CLUTCHES
  • IV - OBTAINING THE GEARS
  • V - COMPLETE OVERVIEW OF THE AUTOMATIC TRANSMISSION
• CHAPTER 8 : THE HYDRAULIC CIRCUIT
  • I - FUNCTIONS
  • II - OIL PUMP
  • III - THE HYDRAULIC UNIT
• CHAPTER 9 : SENSORS AND INFORMATION
  • I - PROGRAM SELECTOR
  • II - AUTOMATIC TRANSMISSION INPUT AND OUTPUT SPEED SENSORS
  • III - OIL TEMPERATURE PROBE
  • IV - BRAKING INFORMATION
  • V - LOGICAL INFORMATION SUPPLIED BY THE EMC
  • VI - SELECTOR LEVER POSITION INFORMATION
• CHAPTER 10 : THE ECU
  • I - ECU FUNCTIONS
  • II - INPUTS/OUTPUTS
  • III - CONNECTIONS
  • IV - ECU ARCHITECTURE
• CHAPTER 11 : THE STRATEGIES
  • I - GEAR CHANGING LAWS
  • II - HOLD COMMAND
  • III - PROGRAMS AND VARIOUS LAWS
  • IV - DSP FUNCTION (AUTOADAPTIVE CHANGING LAWS)
  • V - ADAPTIVE REGULATION OF LINE PRESSURE
  • VI - OPERATING THE LOCK-UP CLUTCH
  • VII - SAFETY FUNCTIONS
  • VIII - FUNCTIONS PERFORMED BY THE ENGINE MANAGEMENT COMPUTER (EMC)
• CHAPTER 12 : ASSOCIATED FUNCTIONS
  • I - CONTROL PANEL DISPLAY
  • II - OPERATION OF REVERSING LIGHTS
  • III - STARTING PREVENTION
  • IV - SHIFT-LOCK
  • V - KEY-LOCK
  • VI - OPERATING THE FANS
• CHAPTER 13 : DIAGNOSTIC
  • I - GENERAL
  • II - SERIAL COMMUNICATIONS WITH THE ELIT TESTER
  • III - DESCRIPTION OF THE DIAGNOSTIC
• CHAPTER 14 : WIRING DIAGRAM
  • I - LAYOUT
  • II - INSTALLATION
  • III - LOCATION
  • IV - PARTS LIST
• CHAPTER 15 : AFTER-SALES OPERATIONS
  • I - DOWNLOADING TO THE ECU
  • II - INITIALISING THE ECU
  • III - TESTING AFTER THE WORK
  • IV - LIST OF AUTHORISED OPERATIONS ON THE 4HP20 TRANSMISSION IN AFTER-SALES DURING THE FIRST YEAR OF WARRANTY
  • V - SPECIAL TOOLING
• CHAPTER 16 : DIAGNOSTIC - LOCATING FAULTS
  • I - TRANSMISSION REPAIR PROCEDURE
  • II - ANALYSE THE RESULTS
  • III - AUTOMATIC TRANSMISSION OIL LEAKS
  • IV - PRESENTATION
  • V - DIAGNOSTIC: AUTOMATIC TRANSMISSION 4HP20

Superb manual

250 Pages

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