Enhanced Easy-Stop Trailer ABS 2S/2M Standard With .

4.Push the hinged power/diagnostic connector retainer clip UPand remove the protective cap from the ECU/dual modulatorvalve assembly. Figure 10.8.If you are installing the power/diagnostic “Y” cable:A.Install the diagnostic cable bracket so that the diagnosticplug is accessible. The normal location is on the rightfront corner of the sub-frame, but will vary depending onthe type of trailer.B.Route the diagnostic cable from the ECU/dual modulatorvalve assembly to the diagnostic cable bracket.C.Correctly secure the cable in the sub-frame to preventcable damage.Figure 10CAPLetteringon cableconnectionmust faceDOWN.Leave enough slack in the cable to compensate for flexingof the trailer and b6.7.Plug the power 8-pin connector on the power or power/diagnostic cable into the ECU/dual modulator valve assembly.WABCO identification on the cable connection must faceDOWN. Figure 10.Install the ABS indicator lamp on the trailer. Refer to the vehiclespecification sheet for the exact location of the indicator lamp.Use a DOT-approved lamp with ABS etched on the lens(available from major trailer parts suppliers).If you are using the industry-standard connector cable and donot have access to the mating trailer harness, mask the openconnector to protect it from paint or grease.Figure 105.Bundle any excess cable in a loop (bow tie) and securethe cable in the sub-frame. Figure 8.10. Connect the power. Use the industry-standard connector cableor a blunt-cut power cable.Pull the hinged power/diagnostic connector retainer clip on theECU/dual modulator valve assembly DOWN to secure theconnection.If you are installing the power cable only, go to Step 9.For industry-standard connector cables: Attach the powercable to the harness on the trailer. Figure 10.For an optional blunt-cut power cable: Wire the cable andABS indicator lamp to the seven-way connector on the traileraccording to the following diagram. Figure 11.Figure 11GENERIC INPUT/OUTPUT (EXPANDED CAPABILITY)WHITE AND YELLOWBLU7 WAYYELRED GRNBLUE(CONSTANT POWER)37BRNRED(STOP LAMP)GREEN AND WHITEGROUND26BLK15WHT4 OR 5 WIRESCHEMATIC48WHITE(GROUND)TRAILER ABSINDICATOR LAMPECU POWER CONNECTORJunction box not shown.4003570bFigure 11TP-20213Revised 08-05Page 6Copyright ArvinMeritor, Inc., 2005(16579/24240)Printed in the USA

Typical Easy-Stop Trailer ABS InstallationsRefer to Figure 12 and Figure 13 for typical Easy-Stop trailer ABS installations.Meritor WABCO recommends placing sensors on the axle that will provide the most braking performance. The suspension manufacturer canprovide this information.Figure 12VALVE MOUNTED WITH SENSORS FACING FRONT OF TRAILERYE2FRONT OFTRAILERYE2Typical Tandem Axle TrailerSpring Suspension Installationwith Sensors on Front AxleYE1YE1YE2FRONT OFTRAILERYE2Typical Tandem Axle TrailerAir Suspension Installationwith Sensors on Rear AxlesYE1SERVICE/CONTROL LINESSENSOR CABLESSERVICE BRAKESUPPLY AIRSPRING BRAKE AIRYE14005508aFigure 12(16579/24240)Printed in the USACopyright ArvinMeritor, Inc., 2005TP-20213Revised 08-05Page 7

Meritor WABCO recommends placing sensors on the axle that will provide the most braking performance. The suspension manufacturer canprovide this information.Figure 13VALVE MOUNTED WITH SENSORS FACING REAR OF TRAILERYE1FRONT OFTRAILERYE1Typical Tandem Axle TrailerSpring Suspension Installationwith Sensors on Front AxleYE2YE2YE1FRONT OFTRAILERYE1Typical Tandem Axle TrailerAir Suspension Installationwith Sensors on Rear AxlesYE2SERVICE/CONTROL LINESSENSOR CABLESSERVICE BRAKESUPPLY AIRSPRING BRAKE AIRYE24003509aFigure 13TP-20213Revised 08-05Page 8Copyright ArvinMeritor, Inc., 2005(16579/24240)Printed in the USA

End of Line TestingFigure 14End of line testing is required on all Enhanced Easy-Stop installations. To run these tests, Meritor WABCO recommends youuse TOOLBOX Software.TOOLBOX Software and general test procedures are included inthis bulletin. If you are using a Pro-Link, refer to the operatingmanual for test instructions.Enhanced Easy-Stop 2S/2M StandardInstallation — End of Line Testing Procedurewith TOOLBOX SoftwareIf you are testing an installation that has a power only cable,temporarily install a Meritor WABCO combination power/diagnostics“Y” style cable.1.Connect the diagnostic connector on the cable to the PC serialport/SAE diagnostic interface (J1587/J1708 to RS232interface).4003560aRefer to the Software Owner’s Manual, TP-99102, forinstructions for running TOOLBOX Software.2.Display the Trailer ABS Main Screen.3.Verify the power supply.Figure 144.NONE No faults present, proceed with end of line test.앫 Apply 12 volts DC to the blue wire (constant). Check thescreen for the correct voltage (9.4 to 14 volts). Constantpower voltage is displayed in the Primary field. Figure 14.앫 Apply 12 volts DC to the red wire (stoplight power). Checkthe screen for the correct voltage (9.4 to 14 volts). Stoplightpower voltage is displayed in the Secondary field.Figure 14.Check the Faults field on the Main Screen.YES Faults present, double-click on “YES” to bring up thefault information screen. Figure 15.Use the information in the Repair Instructions field to performthe necessary repairs.Figure 15The Internal field is not applicable to this test.4003561aFigure 15(16579/24240)Printed in the USACopyright ArvinMeritor, Inc., 2005TP-20213Revised 08-05Page 9

End of Line Test with TOOLBOX Software7.Verify Correct Valve and Lamp InstallationTo verify valve and lamp installations with TOOLBOX Software:1.Apply 12 volts DC to the ABS.2.Apply air to the emergency line to fill the air tanks and releasethe spring brakes.3.Apply air to the control line.4.At the Trailer Main Screen, click on Component Test, thenselect Valves/Lamp to display the Valve Activation Screen.The Yellow valve indicator will be highlighted. Figure 16.Repeat this test for the Blue valve.A.Repeat Steps 1-3.B.Select the Blue valve from the valve activation screen.C.Click on the Activate button to verify correct valveinstallation (Blue).D.Check for correct air line installation. To accomplish this,observe the slack adjusters.앫 If the ECU faces the FRONT of the trailer, the slackadjusters will move in and out as the ROADSIDEportion of the dual modulator valve cycles. If this doesnot happen, the air lines are not correctly connected.Perform the necessary repairs.Figure 16앫 If the ECU faces the REAR of the trailer, the slackadjusters will move in and out as the CURBSIDEportion of the dual modulator valve cycles. If this doesnot happen, the air lines are not correctly connected.Perform the necessary repairs.8.Click on the Test button to activate the ABS indicator lamp —this is the lamp that is mounted on the side of the trailer. Thelamp will flash eight times, indicating lamp installation is OK.The Test Status box at the bottom of the menu will display thestatus of this test. Figure 16.9.Click on Close to exit.Sensor Orientation TestThe sensor orientation test must be performed as part of the end ofline testing procedure.4003562bFigure 165.Click on the Activate button.6.Check for correct air line installation. To accomplish this,observe the slack adjusters.Sensor Orientation Test ScreenBefore beginning this test, look at the ECU to see if the wheel endsensors face the front or rear of the trailer. TOOLBOX will ask forthis information to start the test (Step 5). To perform the sensororientation test:앫 If the ECU faces the FRONT of the trailer, the slack adjusterswill move in and out as the CURBSIDE portion of the dualmodulator valve cycles. If this does not happen, the air linesare not correctly connected. Perform the necessary repairs.1.Raise the sensed wheel ends off the ground.2.Apply air to the emergency line to fill the air tanks and releasethe spring brakes so that the wheels can be rotated.앫 If the ECU faces the REAR of the trailer, the slack adjusterswill move in and out as the ROADSIDE portion of the dualmodulator valve cycles. If this does not happen, the air linesare not correctly connected. Perform the necessary repairs.3.Apply 12 volts DC to the ABS.4.At the Trailer Main Menu, click on Component Test, thenselect Sensor Orientation Test to display the SensorOrientation Test screen. Figure 17.The Test Status box at the bottom of the menu will display thestatus of this test.TP-20213Revised 08-05Page 10When the Sensor Orientation Test screen first appears,the Sensors Facing field will display the default — Front.This will occur regardless of the actual sensor orientation of theinstallation being tested.Copyright ArvinMeritor, Inc., 2005(16579/24240)Printed in the USA

6.Figure 17Click on Start to begin the test. Figure 19.Figure 194005502aFigure 174005459c5.Click on Front or Rear in the Sensors Facing field to selectthe mounting orientation of the ECU/dual modulator valveassembly.Figure 197.Refer to Figure 17 and Figure 18 for illustrations of the ECUmounted with sensors facing forward and rear. The correctmounting orientation must be selected prior to starting the test.Figure 18Follow the screen prompts, starting with 1, to rotate eachsensed wheel end at a rate of 1/2 revolution per second.This rate equals a wheel speed of approximately 4 mph(7 kph). As each sensed wheel is rotated, check the color ofthe sensor identification block on the screen for results.Sensor identification boxes are located in the bottom leftportion of the Sensor Orientation Test screen. Figure 18.Green background: Correct sensor location. Spin the nextsensed wheel as indicated by the screen prompt.Red background: Incorrect sensor location. If you get a redbackground, you must stop the test (click on Stop), make thenecessary corrections and repeat Steps 3 through 6.8.To finish the Sensor Orientation Test, click on Stop, then onClose.9.Verify there is sensor output. If there is no sensor output, verifythat a tone ring has been installed and that the sensor ispushed all the way in against the tone ring. Perform thenecessary repairs and repeat the test. If the problem persists,contact Meritor WABCO (800-535-5560). Sensor outputappears in the Sensors field located in the bottom right portionof the Sensor Orientation Test screen. Figure 17 andFigure 18.4005513aFigure 18(16579/24240)Printed in the USACopyright ArvinMeritor, Inc., 2005TP-20213Revised 08-05Page 11

End of Line Test without TOOLBOX SoftwareFigure 20VALVE MOUNTED WITH SENSORS FACINGFRONT OF TRAILERCURBSIDE YE2Inspect the Sensor and Air Line Installation.ROADSIDE YE1Sensor Installation1.Look at the YE2 and YE1 sensor connectors on the ECU/dualmodulator valve assembly. Ensure that the connectors arerouted to the correct wheel end location, as follows:PLUG ALLUNUSEDPORTS앫 If the ECU/dual modulator valve assembly is mounted withthe sensors facing the front of the trailer:YE2DELIVERYCURBSIDE— Sensor YE2 must be routed to the curbside wheel endlocation.4005511a— Sensor YE1 must be routed to the roadside wheel endlocation.앫 If the ECU/dual modulator valve assembly is mounted withthe sensors facing the rear of the trailer:YE1DELIVERYROADSIDEFigure 20Figure 21VALVE MOUTED WITH SENSORS FACINGREAR OF TRAILER— Sensor YE2 must be routed to the roadside wheel endlocation.ROADSIDE YE2CURBSIDE YE1— Sensor YE1 must be routed to the curbside wheel endlocation.2.If sensors are not correctly installed, perform the necessaryrepairs.PLUG ALLUNUSEDPORTSAir Line Installation1.Ensure that all unused air ports are plugged and that theexhaust port is facing DOWN.2.Look at the air line installation to verify that all air lines arecorrectly 05512aFigure 21앫 If the ECU/dual modulator valve assembly is mounted withthe sensors facing the FRONT of the trailer, the air lines forthe three delivery ports located under the YE2 sensorconnector must be routed to CURBSIDE; the air lines for thethree delivery ports on the opposite side of the valve mustbe routed to ROADSIDE. Figure 20.3.If the air lines are not correctly routed, perform the necessaryrepairs.앫 If the ECU/dual modulator valve assembly is mounted withthe sensors facing the REAR of the trailer, the air lines forthe three delivery ports located under the YE2 sensorconnector must be routed to ROADSIDE; the air lines for thethree delivery ports on the opposite side of the valve mustbe routed to CURBSIDE. Figure 21.TP-20213Revised 08-05Page 12Copyright ArvinMeritor, Inc., 2005(16579/24240)Printed in the USA

Perform End of Line Test1.Apply 12 volts DC power to the ABS.2.Listen for the ECU/dual modulator valve assembly to clickfour times.3.Check the trailer ABS indicator lamp on the side of the trailer.The fault code will be displayed three times.5.Find the fault on the chart and perform the necessary repairs.6.After performing the necessary repairs, repeat the end ofline test.If the indicator lamp comes on for three seconds and thengoes out, this indicates a correct installation. The end of linetest is complete.Blink Code ChartIf the ABS indicator lamp comes on and stays on, check thesensor installation.BlinkCodeProblem AreaActionA.4Sensor YE1Determine sensor location.B.4.4.Remove power from the ABS and raise the sensed wheelsso they may be rotated.Apply emergency air to fill the air tanks and release thespring brakes so that the wheels may be rotated.Check sensor installation.Perform necessary repairs.6Sensor YE2C.Repeat Steps 1 and 2.Check sensor installation.D.Rotate each sensed wheel — one at a time — at a rateof 1/2 revolution per second. This rate equals a wheelspeed of approximately 4 mph (7 kph).Perform necessary repairs.9The ABS indicator lamp should now go out and stay outindicating a correct installation. The end of line test iscomplete.Internal modulatorfailure, inlet valve#2Verify correct installation.If code continues, contactMeritor WABCO for assistance.10Internal modulatorfailure, inlet valve#1Verify correct installation.If code continues, contactMeritor WABCO for assistance.11Internal modulator Verify correct installation.failure, outlet valve If code continues, contactMeritor WABCO for assistance.14Power SupplyIf the ABS lamp does not go out, there is a sensor gap problemor hardware fault. Adjust the sensor and, if necessary, performa fault code check.Sensor Gap AdjustmentPush the sensor into its holder until it contacts the tooth wheel. Atinstallation, there must be no gap between the sensor and the toothwheel.Measure the AC voltage output. The value should be 0.2 volt ACwhen the wheel is rotated at a rate of 1/2 revolution per second.Repeat the end of line test. If the trailer lamp still does not go out, asystem fault exists. Perform a fault code check.Fault Code CheckUse constant power activation to perform the following fault codecheck.Perform necessary repairs.15ECU Failure16SAE J1708 Failure Internal failure, contactMeritor WABCO.17SAE J2497 Failure Internal failure, contactMeritor WABCO.18Generic I/O Failure Verify correct electricalinstallation.Remove the power.3.Reapply the power.(16579/24240)Printed in the USAVerify correct installation.If code continues, contactMeritor WABCO for assistance.Check power supply.Apply constant power to the ECU/dual modulator valveassembly for more than one, but less than five seconds.2.Verify correct electricalinstallation.Check power supply.Perform any necessary repairs.1.Determine sensor location.Perform necessary repairs.Copyright ArvinMeritor, Inc., 2005TP-20213Revised 08-05Page 13

Trailer IdentificationAfter ensuring the Enhanced Easy-Stop trailer ABS has beencorrectly installed, attach the ABS indicator label included with theECU/dual modulator valve assembly to the trailer. Generally, this willbe applied near the ABS trailer indicator lamp. Figure 22. Refer tothe vehicle specification sheet for the correct location.Figure 22NOTICE:If the ABS indicator lampcomes on and stays on when youapply the brakes to a moving vehicle,the trailer ABS is not working properly.The ABS must be serviced as soon aspossible upon completion of your trip toensure full anti-lock braking capability.TP-95172Rev. 4/984005501aFigure 22If this label is not included with the assembly, let your supervisorknow. Labels are available from Meritor WABCO. Ask for partnumber TP-95172.For additional assistance, contact Meritor WABCO at800-535-5560.TP-20213Revised 08-05Page 14Copyright ArvinMeritor, Inc., 2005(16579/24240)Printed in the USA

Appendix4.Installing Sensors on Non-ABS-PreppedAxlesSensor locations vary due to suspension type. Meritor WABCOrecommends placing the sensor on the axle that will provide themost braking performance. Contact your suspension manufacturerfor further information.1.2.NOTE: Brake hose clips with a provision for the sensorextension cable are recommended as opposed to tie wraps.Meritor WABCO does not supply this part.Apply a mineral oil-based grease that contains molydisulfideto the sensor spring clip, the body of the sensor and the boreof the sensor block. The grease must be anti-corrosive andcontain adhesive properties that will continuously enduretemperatures from –40 to 300 F (–40 to 150 C).Push the spring clip into the sensor holder from the inboardside, until the spring clip tabs are against the sensor holder.Push the sensor into the spring clip as far as possible.Route the sensor cable toward the brake chamber, over thebrake spider or through the pre-stamped hole dedicated toABS sensors. Route to the back side of the axle. Secure thecable to the axle between the brake spider and the suspensionbrackets. Continue to route the sensor cable behind the springseats. Secure the cable to the axle one inch from the moldedsensor plug. Figure A-2.Do not overtighten tie wraps on a cable. Overtightening candamage the cable. Do not tie wrap the molded sensor plug.The sensor extension cable must follow the brake hose to theECU/valve assembly to allow for axle jounce and rebound.Figure A-2Use Meritor WABCO spring clips to ensure a correct fit.3.SENSORCABLEPush the spring clip into the sensor holder from the inboardside until the spring clip tabs are against the sensor holder.Push the sensor into the spring clip as far as possible.Figure A-1.1"Figure A-1SPRINGCLIP TABSENSORHOLDER4003573aFigure A-25.Install the wheel hub carefully so that the tooth wheel pushesagainst the sensor as the wheel bearings are adjusted. Ther

Customer Service Center at 800-535-5560, or visit the Tech Library on our website at meritorwabco.com. Differences Between Easy-StopTM and Enhanced Easy-StopTM There are some changes to Enhanced Easy-Stop that you need to be aware of before you begin the installation. Enhanced Easy-Stop includes Power Line Communication (PLC) function.