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Knorr-Bremse Group

Copyright © Knorr-Bremse AG - all rights reserved, including industrial property rights applications. Knorr-Bremse AG retains any power of disposal, such as for copying and transferring.

Knorr-Bremse Systeme für Nutzfahrzeuge GmbH . Moosacher Straße 80 . 80809 Munich . Germany . Tel: +49 89 3547-0 . Fax: +49 89 3547-2767 . www.knorr-bremse.com . www.knorr-bremseCVS.com

Doc. No. Y250903 (EN - Rev. 000)

July 2016

Revision Details

Rev. 000

July 2016

New document

Safety and Environmental Guidelines

13  Before removing any device note its position and the connections of all pipework so that the replacement/

serviced device can be properly installed. Ensure that adequate support or assistance is provided for the removal/
installation of heavy items. 

14 Only use genuine replacement parts, components and kits as supplied by Knorr-Bremse or the vehicle 

manufacturer.  Only use the recommended tools as specified in related Knorr-Bremse instructions.

15  The serviced or replaced product must be checked for correct function and effectiveness.
16  If products have been dismantled, serviced or replaced, whose performance could affect braking performance 

or system behaviour, this should be checked on a roller dynamometer. Bear in mind that a lower performance 
may be experienced during the bedding-in phase if new brake pads/linings and/or brake discs/drums have been 
fitted.

17  The use of impact screwdrivers or impact wrenches in conjunction with Knorr-Bremse service tools for air disc 

brakes is not permitted. The service tools are not designed for such use. It is likely that the tools or the vehicle 
will be damaged and there is a serious risk of injury – see 

Caution

 on previous page.

18  Do not use compressed air to clean the disc brake. Avoid air contamination of brake dust.
19  Prior to returning the vehicle to service, make certain that all components and the complete brake systems are 

leak free and restored to their proper operating condition.

Welding

To avoid damage to electronic components when carrying out electrical welding, the following precautions should 
be observed:
1  In all cases, before starting any electrical welding, remove all connections from any electronic control units or 

modules, noting their position and the order in which they are removed.

2  When re-inserting the electrical connectors (in reverse order) it is essential that they are fitted to their correct 

assigned position - if necessary this must be checked by PC Diagnostics.

Disposal of Waste Equipment by Business Users in the European Union

This symbol on the product, packaging or in user instructions, indicates that this product must not 
be disposed of with other general waste. Instead, it is your responsibility to dispose of the waste 
electrical and electronic parts of this product by handing them over to a company or organisation 
authorised for the recycling of waste electrical and electronic equipment. For more information about 
arrangements for waste equipment disposal please contact your Knorr-Bremse distributor or local 
Knorr-Bremse representative. 

See Y075876 for latest revision.

Y026787: 006: EN: Released: Fri Nov 11 11:18:50 CET 2016: 

Summary of Contents for KB4TA

Page 1: ...and 4S 2M Several diagnostic options available Retrofitable to existing trailers KB4TA With integrated anti compounding P r o d u c t M a n u a l System and I nstallation I nstruc tions for KB4TA and...

Page 2: ...Revision Details Rev 000 July 2016 New document Rev 001 September 2016 Changes made to suit the Brazilian market Y026787 006 EN Released Fri Nov 11 11 18 50 CET 2016...

Page 3: ...comments regarding manual layout please send the details to your local Knorr Bremse representative The information contained in this manual is intended for the exclusive use of trained persons within...

Page 4: ...2016 Glossary of Abbreviations ABS Anti lock Braking System AUXIO Auxiliary Input Output CAN Controller Area Network ECE Economic Commission for Europe United Nations ECU Electronic Control Unit EU Eu...

Page 5: ...ork to support the chassis from sudden lowering and therefore prevent any possibility of being trapped between the chassis and axle or ground 7 Park the vehicle on a level surface apply the parking br...

Page 6: ...for air disc brakes is not permitted The service tools are not designed for such use It is likely that the tools or the vehicle will be damaged and there is a serious risk of injury see Caution on pr...

Page 7: ...www knorr bremse com www knorr bremseCVS com Contents C o m m e r c i a l V e h i c l e S y s t e m s Title Doc No PD No KB4TA System Overview Y250904 PD 203 400 KB4TA D System Overview Y250905 PD 20...

Page 8: ...retains any power of disposal such as for copying and transferring Knorr Bremse Systeme f r Nutzfahrzeuge GmbH Moosacher Stra e 80 80809 Munich Germany Tel 49 89 3547 0 Fax 49 89 3547 2767 www knorr b...

Page 9: ...ilers with mechanical or air suspension KB4TA is designed to work in trailer systems powered via ISO 7638 but the addition of ISO 1185 stop lamp powering is included as standard as a safety feature so...

Page 10: ...Head with Filter Supply 2 Coupling Head with Filter Control 3 ABS Connector ISO 7638 4 Park Shunt Valve with Emergency Function 5 Air Reservoir 6 Drain Valve 7 Load Sensing Valve 8 ABS Module with 6...

Page 11: ...th the speed of each wheel During braking if one or more wheels is on a slippery surface and is unable to support the level of braking that it is being asked to contribute the wheel speed will drop re...

Page 12: ...at the time of configuration A 4S 3M configuration cannot be realised automatically this requires manual configuration with the diagnostic tool ECUtalk ABS manual Configuration Depending upon the req...

Page 13: ...emory as a Diagnostic Trouble Code DTC For some trouble codes the KB4TA module will automatically reset and clear the active DTC once the error has been corrected When an active DTC is cleared automat...

Page 14: ...l functional order before the vehicle is returned into service Knorr Bremse accepts no liability for problems caused as a result of appropriate tests not being carried out Copyright Knorr Bremse AG al...

Page 15: ...ailers with mechanical or air suspension KB4TA D is designed to work in trailer systems powered via ISO 7638 but the addition of ISO 1185 stop lamp powering is included as standard as a safety feature...

Page 16: ...10 Spring Brake 11 Sensing Ring and Wheel Speed Sensor 14 Test Connector 15 Electrical Connector Lighting acc to ISO 1185 KB4TA D System diagram 2S 2M for semi trailer with mechanical suspension and d...

Page 17: ...it with the speed of each wheel During braking if one or more wheels is on a slippery surface and is unable to support the level of braking that it is being asked to contribute the wheel speed will d...

Page 18: ...will perform an auto configuration An auto configuration only adjusts upward e g from 2S 2M to 4S 2M A configuration will not be accepted if a wheel speed signal is generated at the time of configura...

Page 19: ...mory as a Diagnostic Trouble Code DTC For some trouble codes the KB4TA D ECU will automatically reset and clear the active DTC once the error has been corrected When an active DTC is cleared automatic...

Page 20: ...functional order before the vehicle is returned into service Knorr Bremse accepts no liability for problems caused as a result of appropriate tests not being carried out Copyright Knorr Bremse AG all...

Page 21: ...e ISO 7638 connection Stop lamp powering is not available in the 4S 3M configuration The KB4TA module is designed for all normal system variants from 2S 2M up to 4S 3M The configuration as supplied is...

Page 22: ...rr Bremse AG retains any power of disposal such as for copying and transferring Knorr Bremse Systeme f r Nutzfahrzeuge GmbH Moosacher Stra e 80 80809 Munich Germany Tel 49 89 3547 0 Fax 49 89 3547 276...

Page 23: ...s Knorr Bremse AG retains any power of disposal such as for copying and transferring Knorr Bremse Systeme f r Nutzfahrzeuge GmbH Moosacher Stra e 80 80809 Munich Germany Tel 49 89 3547 0 Fax 49 89 354...

Page 24: ...CANH 5V CAN High for Diagnostics X1 6 BAT Valve Supply Voltage ISO 7638 ABS connector Pin 1 Pin Signal Connection X1 7 GND_H Warning Lamp Ground ISO 7638 ABS connector Pin 3 X1 8 WL Warning Lamp ISO 7...

Page 25: ...power of disposal such as for copying and transferring Knorr Bremse Systeme f r Nutzfahrzeuge GmbH Moosacher Stra e 80 80809 Munich Germany Tel 49 89 3547 0 Fax 49 89 3547 2767 www knorr bremse com w...

Page 26: ...propriate tests not being carried out Copyright Knorr Bremse AG all rights reserved including industrial property rights applications Knorr Bremse AG retains any power of disposal such as for copying...

Page 27: ...itional axle modulator normally on a cross member in the centre of the front axle bogie 3 Make the necessary pneumatic connections 4 Make the necessary electrical connections see PD 203 380 Document N...

Page 28: ...trial property rights applications Knorr Bremse AG retains any power of disposal such as for copying and transferring Knorr Bremse Systeme f r Nutzfahrzeuge GmbH Moosacher Stra e 80 80809 Munich Germa...

Page 29: ...Note Stop lamp powering should only be considered as a backup in the event of failure of the ISO 7638 connection The KB4TA D ECU is designed for all normal system variants from 2S 2M up to 4S 3M The...

Page 30: ...disposal such as for copying and transferring Knorr Bremse Systeme f r Nutzfahrzeuge GmbH Moosacher Stra e 80 80809 Munich Germany Tel 49 89 3547 0 Fax 49 89 3547 2767 www knorr bremse com www knorr b...

Page 31: ...such as ISO 1185 stop lamp power supply additional third modulator and one additional Input Output Also a Code B connector for the connections to the ABS Relay Modulators The ECU also utilizes either...

Page 32: ...p ground X1 8 ISO 7638 Pin 5 warning lamp X1 9 ISO 7638 Pin 2 ignition Diagnostic Connector KB4TA D harnesses provide a 4 pin 5 Volt J1939 CAN diagnostic connection for a diagnostic tool Remote diagno...

Page 33: ...Fax 49 89 3547 2767 www knorr bremse com www knorr bremseCVS com KB4TA D ABS ECU C o m m e r c i a l V e h i c l e S y s t e m s Diagnostics KB4TA D offers two independent possibilities for diagnostic...

Page 34: ...for the KB4TA D ECU view without Cover Notes Tightening torque of the M8 retaining nuts screws 24 4 8 Nm The ECU should be mounted on a flat surface The cable entries must not point upwards The press...

Page 35: ...of appropriate tests not being carried out Copyright Knorr Bremse AG all rights reserved including industrial property rights applications Knorr Bremse AG retains any power of disposal such as for cop...

Page 36: ...ed herein it is the responsibility of the workshop to ensure the vehicle is fully tested and in full functional order before the vehicle is returned into service Knorr Bremse accepts no liability for...

Page 37: ...ut Copyright Knorr Bremse AG all rights reserved including industrial property rights applications Knorr Bremse AG retains any power of disposal such as for copying and transferring Knorr Bremse Syste...

Page 38: ...ains any power of disposal such as for copying and transferring Knorr Bremse Systeme f r Nutzfahrzeuge GmbH Moosacher Stra e 80 80809 Munich Germany Tel 49 89 3547 0 Fax 49 89 3547 2767 www knorr brem...

Page 39: ...se AG retains any power of disposal such as for copying and transferring Knorr Bremse Systeme f r Nutzfahrzeuge GmbH Moosacher Stra e 80 80809 Munich Germany Tel 49 89 3547 0 Fax 49 89 3547 2767 www k...

Page 40: ...d service brake pressure in relation to the load imposed on the vehicle s axles The air suspension load sensing valve uses the pressure in the suspension air springs to sense the load imposed on the a...

Page 41: ...System Components C o m m e r c i a l V e h i c l e S y s t e m s Trailer Data Plate S l Feder Nr Spring No Ressort No bar Automatisch Lastabh ngige Bremskraftregeleinrichtung ALB f r Typ Load Sensin...

Page 42: ...y rights applications Knorr Bremse AG retains any power of disposal such as for copying and transferring Knorr Bremse Systeme f r Nutzfahrzeuge GmbH Moosacher Stra e 80 80809 Munich Germany Tel 49 89...

Page 43: ...valves and are the last valves that air passes through on the way to the brake actuators During normal braking the valve operates as a standard relay valve As the brake control is applied or released...

Page 44: ...is the responsibility of the workshop to ensure the vehicle is fully tested and in full functional order before the vehicle is returned into service Knorr Bremse accepts no liability for problems caus...

Page 45: ...e field thereby creating an induced voltage in the sensor coil This voltage is monitored by the KB4TA KB4TA D module via the output cable The voltage generated takes the form of a sine wave with both...

Page 46: ...lve K019299 added 3 Gently push DO NOT STRIKE the wheel speed sensor into the clamping sleeve until it contacts the face of the sensing ring Secure the sensor cable to the knuckle axle housing or the...

Page 47: ...y s t e m s Cables for KB4TA KB4TA D Doc No Y250909 EN Rev 000 July 2016 Function Technical Features Operating Temperature Range 40 C to 80 C See tables for other features Cables are used in trailer...

Page 48: ...ty for problems caused as a result of appropriate tests not being carried out Copyright Knorr Bremse AG all rights reserved including industrial property rights applications Knorr Bremse AG retains an...

Page 49: ...he risk of damage and subsequent faults in the system Knorr Bremse recommends the following 1 Lay the modulator cable and the wheel speed sensor cables separately on the vehicle frame The sensor cable...

Page 50: ...posal such as for copying and transferring Knorr Bremse Systeme f r Nutzfahrzeuge GmbH Moosacher Stra e 80 80809 Munich Germany Tel 49 89 3547 0 Fax 49 89 3547 2767 www knorr bremse com www knorr brem...

Page 51: ...r Nutzfahrzeuge GmbH Moosacher Stra e 80 80809 Munich Germany Tel 49 89 3547 0 Fax 49 89 3547 2767 www knorr bremse com www knorr bremseCVS com C o m m e r c i a l V e h i c l e S y s t e m s Cables f...

Page 52: ...ng Knorr Bremse Systeme f r Nutzfahrzeuge GmbH Moosacher Stra e 80 80809 Munich Germany Tel 49 89 3547 0 Fax 49 89 3547 2767 www knorr bremse com www knorr bremseCVS com P r o d u c t D a t a Cables f...

Page 53: ...ng and transferring Knorr Bremse Systeme f r Nutzfahrzeuge GmbH Moosacher Stra e 80 80809 Munich Germany Tel 49 89 3547 0 Fax 49 89 3547 2767 www knorr bremse com www knorr bremseCVS com C o m m e r c...

Page 54: ...fahrzeuge GmbH Moosacher Stra e 80 80809 Munich Germany Tel 49 89 3547 0 Fax 49 89 3547 2767 www knorr bremse com www knorr bremseCVS com P r o d u c t D a t a Cables for KB4TA KB4TA D Part No Type No...

Page 55: ...Knorr Bremse AG retains any power of disposal such as for copying and transferring Knorr Bremse Systeme f r Nutzfahrzeuge GmbH Moosacher Stra e 80 80809 Munich Germany Tel 49 89 3547 0 Fax 49 89 3547...

Page 56: ...er of disposal such as for copying and transferring Knorr Bremse Systeme f r Nutzfahrzeuge GmbH Moosacher Stra e 80 80809 Munich Germany Tel 49 89 3547 0 Fax 49 89 3547 2767 www knorr bremse com www k...

Page 57: ...norr Bremse AG retains any power of disposal such as for copying and transferring Knorr Bremse Systeme f r Nutzfahrzeuge GmbH Moosacher Stra e 80 80809 Munich Germany Tel 49 89 3547 0 Fax 49 89 3547 2...

Page 58: ...the vehicle is returned into service Knorr Bremse accepts no liability for problems caused as a result of appropriate tests not being carried out Copyright Knorr Bremse AG all rights reserved includin...

Page 59: ...ility for problems caused as a result of appropriate tests not being carried out Copyright Knorr Bremse AG all rights reserved including industrial property rights applications Knorr Bremse AG retains...

Page 60: ...ndustrial property rights applications Knorr Bremse AG retains any power of disposal such as for copying and transferring Knorr Bremse Systeme f r Nutzfahrzeuge GmbH Moosacher Stra e 80 80809 Munich G...

Page 61: ...Y250910 EN Rev 001 September 2016 PD 203 390 Function The term Diagnostics is an all embracing name which may be applied to any device or program which is able to provide status information in a forma...

Page 62: ...etains any power of disposal such as for copying and transferring Knorr Bremse Systeme f r Nutzfahrzeuge GmbH Moosacher Stra e 80 80809 Munich Germany Tel 49 89 3547 0 Fax 49 89 3547 2767 www knorr br...

Page 63: ...is entered by providing constant power to the ignition circuit and by switching the stop lamp power input supply ON and OFF a number of times see Diagnostic Trouble Codes With a parked towing vehicle...

Page 64: ...000 i e one blink pause five blinks pause two blinks Zeros will be displayed by the ABS warning lamp blinking twice Odometer mileage cannot be altered with blink code diagnostics Complete odometer inf...

Page 65: ...ial out of range Verify correct tyre size proper tyre inflation correct number of sensing ring teeth Verify that the ECU has the correct tyre size settings 6 Wheel speed sensor configuration error Ver...

Page 66: ...approximately 2 seconds and then turns OFF The KB4TA module KB4TA D ECU is functioning normally No service to the ABS components is needed Verify that the dashboard mounted trailer ABS warning lamp i...

Page 67: ...ncluding industrial property rights applications Knorr Bremse AG retains any power of disposal such as for copying and transferring Knorr Bremse Systeme f r Nutzfahrzeuge GmbH Moosacher Stra e 80 8080...

Page 68: ...id not illuminate during the power up sequence Troubleshoot the power supply to the module Go to Chart 4 Verify stop lamp supply at the ISO 1185 connector Verify configuration and correct installati o...

Page 69: ...10 9 8 7 KB4TA KB4TA D Module Wiring Harness ECU X1 Connector measure Pin 12 Stop lamp Power to Pin 11 ground 12 11 10 9 8 7 KB4TA KB4TA D Module Wiring Harness ECU X1 Connector measure Pin 6 Battery...

Page 70: ...dules WSS Pinning SR Right Sensor SAR Additional Right Sensor SL Left Sensor SAL Additional Left Sensor Turn off power to module If Dynamic WSS DTC s is present Rotate the effected wheel and verify a...

Page 71: ...Common connector pins No continuity from modulator connector pins to ground Vbat is not measured at any modulator connector pins Modulator ECU wiring and connectors are not damaged or corroded If an i...

Page 72: ...ll functional order before the vehicle is returned into service Knorr Bremse accepts no liability for problems caused as a result of appropriate tests not being carried out Copyright Knorr Bremse AG a...

Page 73: ...m s KB4TA System Diagrams Doc No Y250911 EN Rev 000 July 2016 KB4TA System diagram 2S 2M for semi trailer with air suspension and disc brakes Legend 1 Coupling Head with Filter Supply 2 Coupling Head...

Page 74: ...com www knorr bremseCVS com KB4TA System Diagrams P r o d u c t D a t a KB4TA System diagram 2S 2M for semi trailer with air suspension and drum brakes 11 SERVICE PARKING 12 11 SERVICE PARKING 12 11 S...

Page 75: ...nich Germany Tel 49 89 3547 0 Fax 49 89 3547 2767 www knorr bremse com www knorr bremseCVS com KB4TA System Diagrams C o m m e r c i a l V e h i c l e S y s t e m s KB4TA System diagram 4S 3M for semi...

Page 76: ...information provided herein it is the responsibility of the workshop to ensure the vehicle is fully tested and in full functional order before the vehicle is returned into service Knorr Bremse accepts...

Page 77: ...2016 KB4TA D System diagram 2S 2M for semi trailer with air suspension and disc brakes ECU mounted above centre of bogie Legend 1 Coupling Head with Filter Supply 2 Coupling Head with Filter Control...

Page 78: ...49 89 3547 2767 www knorr bremse com www knorr bremseCVS com KB4TA D System Diagrams P r o d u c t D a t a KB4TA D System diagram 2S 2M for semi trailer with air suspension and disc brakes ECU mounted...

Page 79: ...l V e h i c l e S y s t e m s KB4TA D System diagram 2S 2M for semi trailer with air suspension and drum brakes ECU mounted above centre of bogie Legend 1 Coupling Head with Filter Supply 2 Coupling H...

Page 80: ...o d u c t D a t a KB4TA D System diagram 2S 2M for semi trailer with air suspension and drum brakes ECU mounted at front of trailer Legend 1 Coupling Head with Filter Supply 2 Coupling Head with Filt...

Page 81: ...e com www knorr bremseCVS com KB4TA D System Diagrams C o m m e r c i a l V e h i c l e S y s t e m s KB4TA D System diagram 4S 3M for semi trailer with air suspension and drum brakes Legend 1 Couplin...

Page 82: ...nformation provided herein it is the responsibility of the workshop to ensure the vehicle is fully tested and in full functional order before the vehicle is returned into service Knorr Bremse accepts...

Page 83: ...Y026787 006 EN Released Fri Nov 11 11 18 50 CET 2016...

Page 84: ...ive The figurative mark K and the trademarks KNORR and KNORR BREMSE are registered in the name of Knorr Bremse AG Additional terms and conditionsapply pleaserefertoourwebsiteknorr bremseCVS comforfull...

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