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WABCO ABS, Maintenance Manual

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Service Notes

Information contained in this publication was in effect at the time the publication 
was approved for printing and is subject to change without notice or liability. 
WABCO reserves the right to revise the information presented or to discontinue the 
production of parts described at any time.

WABCO

 Maintenance Manual MM-0112 (Revised 07-18)

About This Manual

This manual contains maintenance procedures for WABCO’s 
Anti-Lock Braking System (ABS), Roll Stability System (RSC), 
Electronic Stability Controls (ESC) and Hill Start Aid (HSA).

Before You Begin

1.

Read and understand all instructions and procedures before 
you begin to service components.

2.

Read and observe all Warning and Caution hazard alert 
messages in this publication. They provide information that can 
help prevent serious personal injury, damage to components, 
or both.

3.

Follow your company’s maintenance and service, installation 
and diagnostics guidelines.

4.

Use special tools when required to help avoid serious personal 
injury and damage to components.

Hazard Alert Messages and Torque 
Symbols

Read and observe all Warning and Caution hazard alert messages in 
this publication. They provide information that can help prevent 
serious personal injury, damage to components, or both.

WARNING

A Warning alerts you to an instruction or procedure that you 
must follow exactly to avoid serious personal injury and 
damage to components.

CAUTION

A Caution alerts you to an instruction or procedure that you 
must follow exactly to avoid damage to components.

@

 This symbol alerts you to tighten fasteners to a specified torque 

value.

WARNING

To prevent serious personal injury, always wear safe eye 
protection when you perform vehicle maintenance or service.

Release all air from the air systems before you remove any 
components. Pressurized air can cause serious personal 
injury.

CAUTION

When welding on an ABS- or ABS/ATC-equipped vehicle is 
necessary, disconnect the power connector from the ECU to 
prevent damage to the electrical system and ABS/ATC 
components.

How to Obtain Additional Maintenance, 
Service and Product Information

Visit wabco-auto.com to access and order additional information.

Contact WABCO North America Customer Care at 855-228-3203 
(United States and Canada); 001-800-889-1834 (Mexico).

If Tools and Supplies are Specified in 
This Manual

Call Meritor’s Commercial Vehicle Aftermarket at 888-725-9355 to 
obtain Meritor tools and supplies.

Summary of Contents for ABS

Page 1: ...ANTI LOCK BRAKING SYSTEM ABS AND ELECTRONIC STABILITY CONTROLS ESC FOR E VERSION ECUs MAINTENANCE MANUAL...

Page 2: ...hazard alert messages in this publication They provide information that can help prevent serious personal injury damage to components or both WARNING A Warning alerts you to an instruction or procedu...

Page 3: ...e to non asbestos fiber dust a cancer and lung disease hazard Material Safety Data Sheets are available from WABCO Hazard Summary Most recently manufactured brake linings do not contain asbestos fiber...

Page 4: ...Valves ABV Testing 32 Brake Pressure Sensor Testing 33 ESC CAN Network Testing ESC Module Testing 35 Steering Angle Sensor SAS Testing 37 ECU Circuit Testing J1939 Serial Communications Testing 39 Sec...

Page 5: ...e traction and steering control during an extreme braking event During a potential wheel lock event the ABS ECU using information provided by the wheel speed sensors sends a signal s to the appropriat...

Page 6: ...or valve is usually located on a frame rail or cross member near the brake chamber or as part of a valve package A valve package combines two modulator valves a service relay Figure 1 5 or quick relea...

Page 7: ...d HSA system It provides the system with the driver s brake demand The sensor can be located in the primary or secondary delivery circuit depending on the application Figure 1 9 Figure 1 9 Steering An...

Page 8: ...stopping distances in off road conditions or on poor traction surfaces such as loose gravel sand and dirt ATC Switch A vehicle manufacturer might offer an ATC switch to control the ATC function Depend...

Page 9: ...DULATOR VALVES ABS MODULATOR VALVE ABS MODULATOR VALVE RELAY VALVE WHEEL SPEED SENSORS ECU 4S 4M CONFIGURATION ABS ONLY AIR LINES ELECTRICAL LINES LAMPS QUICK RELEASE VALVE Figure 1 13 VALVE PACKAGE I...

Page 10: ...cator lamp on the vehicle dash or instrument panel marked ATC ASR or potentially Stability Control depending on the application ATC Components ATC uses the base ABS components plus an active braking v...

Page 11: ...teer axle brakes may be applied as well Similar to ATC RSC works automatically The driver does not have to select this feature Unlike ATC RSC cannot be turned off by the driver RSC Components RSC uses...

Page 12: ...able as part of the ABS ATC valve package Depending on the application a modulator valve may be located downstream of the solenoid valve Figure 2 7 WARNING RSC helps reduce the tendency of the vehicle...

Page 13: ...akes a pressure sensor an ESC module and a Steering Angle Sensor SAS are required in addition to the components necessary for RSC Figure 2 8 and Figure 2 9 These components are also described in the f...

Page 14: ...with any questions regarding ESC ECU Figure 2 8 and Figure 2 9 Figure 2 8 NOTE ESC modules are installed by the OEM close to the vehicle center of gravity Depending on the vehicle manufacturer the ES...

Page 15: ...as ATC and RSC HSA uses the front axle active braking valve as well as the rear active braking valve to help maintain the pressure trapped during HSA activation A pressure sensor provides the system w...

Page 16: ...ssage to the engine to increase engine RPM to prevent drive axle lock up if the vehicle is on a downhill grade and in the incorrect gear Lift Axle Capability Certain six sensor ABS ECUs with ATC allow...

Page 17: ...stics The location of the ABS indicator lamps varies depending on the make and model of the vehicle Figure 3 1 ATC and RSC ESC functions may share the same dash indicator lamp Therefore understanding...

Page 18: ...are versions TOOLBOX 12 or higher is required To display E version ABS RSC ESC or HSA faults 1 Connect the computer to the vehicle Attach the USB serial cable from your computer s USB or serial port t...

Page 19: ...device is RP1210A compliant and that the comport settings Vendor Protocol Adapter in TOOLBOX Software are correct Verify the device software and firmware is up to date Check all the powers and grounds...

Page 20: ...Figure 3 9 and Figure 3 10 Figure 3 9 Figure 3 10 8 A description of the fault the number of times the fault occurred the system identifier SID the failure mode FMI and Suspect Parameter Number SPN a...

Page 21: ...mended to use WABCO TOOLBOX Software for detailed troubleshooting of any of these systems Before using blink code diagnostics you should be familiar with a few basic terms If you used previous version...

Page 22: ...3 11 4S 4M 6S 6M 6x2 6S 4M 1002020c 6S 6M 6x4 NUMBER OF FLASHES ABS CONFIGURATION Procedure System Response Action Diagnostics Mode Step I Turn ignition ON Possible responses ABS indicator lamp comes...

Page 23: ...Pause 1 1 2 seconds Second Digit 1 6 flashes Pause 4 seconds Find definition for blink code on blink code chart Step IV Turn ignition OFF Active Fault Make the necessary repairs Repeat Step 1 Step II...

Page 24: ...turned off 1st Digit 2 3 2 3 5 1 1 2 3 4 2nd Digit Pause 1 5 s Pause 1 5 s Pause 1 5 s Pause 4 s Light ON Off Stored Faults Displays all stored faults once last fault stored is displayed first Blink C...

Page 25: ...rame mounted ECUs with all 18 pin connectors Back probe pin 15 of the X1 connector to ground for 1 second to obtain codes or back probe pin 15 for 3 seconds to clear codes Figure 3 13 Pause 1 5 s Paus...

Page 26: ...time 1 Second Diagnostics Mode 3 Seconds Clear All Mode Repeat procedure hold switch for correct length of time Incorrect or faulty wiring Inspect and repair wiring Fault not erased from ECU after rep...

Page 27: ...ture All readings should be taken at the same time and before vehicle is driven 7 System function 1 J1939 or proprietary ESC CAN Several sensors out of adjustment 2 ATC 3 2 valve 3 Retarder relay or t...

Page 28: ...5 6 7 10 12 9 11 8 X1 GRAY X2 BLACK X4 BROWN ONLY FOR 6 CHANNEL X4 BROWN ONLY FOR 6 CHANNEL X3 GREEN 1 2 3 4 5 6 7 10 12 9 11 8 1 2 3 4 5 6 7 10 12 9 11 8 1 2 3 4 5 6 7 10 12 9 11 8 1 2 3 4 5 6 7 10...

Page 29: ...ere tested clean the electrical contacts at the modulator and retest Figure 3 16 Figure 3 17 Frame Mounted With ESC LF X2 Green 17 and 18 RF X2 Green 5 and 6 LR X3 Green 1 and 2 RR X3 Green 3 and 4 LR...

Page 30: ...ESS CONNECTOR ECU Modulator Circuit Connector Pins Cab Mounted Universal with ESC Universal or Basic ABS modulators are grounded externally i e common is fed to external ground LF IV X2 18 pin 3 LF OV...

Page 31: ...nted Non ESC LF IV X2 Black 2 LF OV X2 Black 10 LF Common X2 Black 11 RF IV X2 Black 4 RF OV X2 Black 3 RF Common X2 Black 9 LR IV X3 Green 12 LR OV X3 Green 10 LR Common X3 Green 11 RR IV X3 Green 9...

Page 32: ...valve individually or you can choose to cycle all valves in a pre determined order Figure 3 21 and Figure 3 22 Then listen to ensure the correct valve is cycling This is helpful in verifying correct o...

Page 33: ...for any shorts to battery and shorts to ground Measurements should read as follows Figure 3 23 Location Measurement ABV Supply to ABV Common 7 0 14 0 ohm for 12V system 26 3 49 0 ohm for 24V system A...

Page 34: ...1 2 3 4 5 6 7 10 12 9 11 8 1 2 3 4 5 6 7 10 12 9 11 8 1 2 3 4 5 6 7 10 12 9 11 8 1 2 3 4 5 6 7 10 12 9 11 8 X1 BLACK X3 GREEN 13 16 18 15 17 14 1 2 3 4 5 6 7 10 12 9 11 8 13 16 18 15 17 14 X2 GREEN EC...

Page 35: ...Front Axle ABV Rear Axle ABV or Trailer ABV individually Figure 3 27 or Figure 3 28 Then listen to ensure the correct valve is cycling This is helpful in verifying correct operation installation and...

Page 36: ...or Figure 3 29 Measure Voltage Supply to Ground on Pin 1 of the BPS Connector Key ON With ECU and BPS disconnected Verify continuity end to end on all 3 lines Verify no shorts to ground or battery on...

Page 37: ...round With ECU and ESC Module disconnected Verify continuity end to end on each line Verify no shorts to ground or battery on all lines Verify no continuity between pins Measurements should read as fo...

Page 38: ...the vehicle manufacturer Figure 3 36 Figure 3 36 ESC Information Available in WABCO TOOLBOX Software 11 or Higher ESC Information can be accessed through WABCO TOOLBOX Software 11 or higher under Comp...

Page 39: ...n CAN Low voltage on Pin 1 Check Key On CAN High voltage on Pin 4 Check Key On Voltage Supply on Pin 5 Check Key Off resistance across CAN low Pin 1 and CAN High Pin 4 NOTE For correct sensor operatio...

Page 40: ...4007216a STEERING ANGLE SENSOR CONNECTOR 1 2 3 4 5 6 Pin Circuit 1 CAN Low 2 Terminating Resistor 3 CAN High 4 CAN High 5 Power 6 Ground Figure 3 42 Pin Circuit 1 Ground 2 Power 3 CAN High 4 CAN Low...

Page 41: ...and Figure 3 49 Measurements should read as follows Location Measurement Supply Voltage Battery to chassis Ground 9 0 16 0V for 12V system 18 0 32 0V for 24V system Supply Voltage Ignition to chassis...

Page 42: ...B MOUNT ECU S LOOKING INTO WIRE HARNESS CONNECTOR 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 X1 4007374a FRAME MOUNT ECU WITHOUT ESC LOOKING INTO WIRE HARNESS CONNECTOR FRAME MOUNT ECU WITH ESC LOOKING INTO...

Page 43: ...o 300 F 40 to 150 C Lubricants approved for use on WABCO sensors and spring clips are as follows Figure 4 1 Mobilith SHC 220 Mobil TEK 662 Roy Dean Products Staburags NBU 30 PTM Kluber Lubrication Val...

Page 44: ...ng normal operation a gap of up to 0 04 inch 1 016 mm is allowable 7 Remove the blocks and safety stands Modulator Valves Removal WARNING Park the vehicle on a level surface Block the wheels to preven...

Page 45: ...ignition key and test drive the vehicle Verify that the ABS indicator lamp operates correctly Active Braking Valves ABV Removal Depending on the OEM specs and vehicle system configuration ABVs may be...

Page 46: ...Installation 1 Connect the blue glad hand to a 50 cu in 819 cu cm air tank 2 Start the vehicle 3 Fully charge the reservoirs with air Shut off the vehicle 4 Activate the valve using TOOLBOX Software v...

Page 47: ...Use a 6 mm Allen wrench to tighten the Allen head bolts to 13 15 lb ft 18 20 N m 7 Replace the ABS valve package Tighten the bolts to the vehicle manufacturer s recommendation Remove the blocks and sa...

Page 48: ...lieve line pressure by bleeding the air from the appropriate supply tank Pressurized air can cause serious personal injury 4 Disconnect the wiring from the solenoid valve 5 Disconnect the supply air l...

Page 49: ...10 Test the installation Checking the Installation 1 Start the vehicle 2 Fully charge the reservoirs with air Shut off the vehicle 3 Apply the brakes 4 Listen for air leaks at all valves 5 Drive the v...

Page 50: ...and ATC ESC lamps should come on and go back off when ignition power is turned on The ATC ESC lamp may remain on briefly after the ABS lamp goes off 3 There should not be any active faults displayed...

Page 51: ...turer s recommendation 6 Remove the blocks 7 Test the installation Test the Installation To test the SAS installation the system must be calibrated 1 Follow the ESC End of Line Calibration Procedure d...

Page 52: ...ated 1 Follow the ESC End of Line Calibration Procedure described in this manual 2 When the ESC End of Line Calibration Procedure is completed the ABS and ATC ESC lamps should come on and go back off...

Page 53: ...itting 2 Connect the wiring harness connector to the brake pressure sensor Hand tighten only 3 Remove the stands and blocks 4 Test the installation Test the Installation To test the brake pressure sen...

Page 54: ...Figure 5 1 Figure 5 2 Figure 5 3 Figure 5 4 Figure 5 1 Figure 5 2 1003363e LAMPS AIR LINES ELECTRICAL LINES VALVE PACKAGE INSTALLATION REAR STANDARD OR BASIC 4S 4M ABS VALVE PACKAGE INSTALLATION FRON...

Page 55: ...AILABLE IN 6S CONFIGURATIONS VALVE PACKAGE INSTALLATION FRONT LAMPS TRAILER ACTIVE BRAKING VALVE TRAILER STABILITY CONTROL MODULATOR OPTIONAL PRESSURE SENSOR OPTIONAL ATC VALVE FRONT AXLE ACTIVE BRAKI...

Page 56: ...6 3 Figure 6 1 BASIC ECU CAB MOUNTED 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 1 2 3 4 5 6 7 8 9 10 11 13 14 15 X2 X1 BASIC 4004024b Figure 6 2 UNIVERSAL ECU CAB MOUNTED 1 2 3 4 5 6 7 8 9 10 11 12...

Page 57: ...9 4 8 5 7 6 12 1 X1 GRAY 12 1 11 2 10 3 9 4 8 5 7 6 X3 GREEN X4 BROWN ONLY FOR 6 CHANNEL 11 2 10 3 9 4 8 5 7 6 12 1 12 1 11 2 10 3 9 4 8 5 7 6 4004026a Figure 6 5 4007396b FRAME MOUNT ECU WITH ESC AN...

Page 58: ...S VALVE RIGHT REAR ABS VALVE RIGHT FRONT SENSOR LEFT REAR SENSOR LEFT FRONT SENSOR RIGHT REAR SENSOR TP 1 4 3 6 2 5 IV GND OV IV GND OV 10 13 11 14 12 15 17 18 IV GND OV IV GND OV 8 9 REAR ABV 1 4 3 6...

Page 59: ...ALVE OUTLET VALVE ABV INLET VALVE OUTLET VALVE RIGHT FRONT ABS VALVE LEFT FRONT ABS VALVE LEFT REAR ABS VALVE RIGHT REAR ABS VALVE RIGHT FRONT SENSOR LEFT REAR SENSOR LEFT FRONT SENSOR RIGHT REAR SENS...

Page 60: ...EAR ABS VALVE RIGHT REAR ABS VALVE RIGHT FRONT SENSOR LEFT REAR SENSOR LEFT FRONT SENSOR RIGHT REAR SENSOR TP 1 4 3 6 2 5 IV GND OV IV GND OV 10 13 11 14 12 15 17 18 IV GND OV IV GND OV 8 9 REAR ABV 1...

Page 61: ...16 13 7 10 1 3 2 5 4 11 14 8 9 12 6 15 17 18 LEFT FRONT ABS VALVE LEFT REAR ABS VALVE RIGHT REAR ABS VALVE RIGHT FRONT SENSOR LEFT REAR SENSOR LEFT FRONT SENSOR RIGHT REAR SENSOR TP 1 4 3 6 2 5 IV GND...

Page 62: ...LEFT REAR SENSOR LEFT FRONT SENSOR RIGHT REAR SENSOR TP 1 4 3 6 2 5 IV GND OV IV GND OV 10 13 11 14 12 15 17 18 IV GND OV IV GND OV 8 9 REAR ABV 1 4 3 6 2 5 7 TP 8 9 TP TP 16 AWG 16 AWG 16 AWG 16 AWG...

Page 63: ...SAE J1939 L ATC ABS ECU GND BAT ECU JUMPER SAE J1587 A SAE J1587 B ABS LAMP 3RD BRK ATC LAMP 3 2 1 6 5 4 9 8 7 11 10 15 14 13 14 PIN CONNECTOR TRAILER INDICATOR LAMP TP 1 3 J1939 L J1939 H 10 11 8 15A...

Page 64: ...E J1939 H TR WL SAE J1939 L ATC ABS ECU GND BAT ECU JUMPER SAE J1587 A SAE J1587 B ABS LAMP 3RD BRK ATC LAMP 3 2 1 6 5 4 9 8 7 11 10 15 14 13 14 PIN CONNECTOR TRAILER INDICATOR LAMP TP 1 3 J1939 L J19...

Page 65: ...6S 6M ONLY TP SENSOR L3RD ABS OFF ROAD SWITCH OUTLET COMMON INLET ABS VALVE LEFT 3RD 6S 6M ONLY 6S 4M AND 6S 6M ONLY GND 11 2 10 3 9 4 8 5 7 6 ABS VALVE RIGHT FRONT ABS VALVE LEFT FRONT INLET COMMON O...

Page 66: ...NLY 6S 4M AND 6S 6M ONLY SENSOR LEFT 3RD X2 GREEN 16 AWG 16 AWG 16 AWG 16 AWG 4010642a TP TP ABS VALVE RIGHT FRONT ABS VALVE LEFT FRONT 16 AWG 16 AWG FRONT AXLE ABV 8 9 10 11 12 13 14 15 16 17 18 7 1...

Page 67: ...FT FRONT INLET COMMON OUTLET OUTLET COMMON INLET SENSOR LEFT FRONT SENSOR RIGHT FRONT TP TP X2 BLACK 12 1 GND 12V IGN 15AMP 5AMP GND 12V 12V GND GND 12 1 11 2 10 3 9 4 8 5 7 6 TRAILER WL RETARDER TP T...

Page 68: ...LEFT 3RD 6S 6M ONLY 6S 4M AND 6S 6M ONLY SENSOR LEFT 3RD X2 GREEN 16 AWG 16 AWG 16 AWG 16 AWG 4010643a TP TP ABS VALVE RIGHT FRONT ABS VALVE LEFT FRONT 16 AWG 16 AWG FRONT AXLE ABV 8 9 10 11 12 13 14...

Page 69: ...ize mismatch Check for correct number of tone ring teeth Verify that ECU is programmed for the correct vehicle 789 1 3 4 2 Shorted to UBATT ABS WL ABS Wheel Disabled ESC RSC ATC HSA Disabled Continuit...

Page 70: ...ent contact Check condition of ABS sensor head Check mounting of tone ring and condition of teeth Check condition and retention of ABS sensor or spring clip Check ABS sensor cable routing and clipping...

Page 71: ...A Disabled Continuity between the sensor connection and battery voltage short circuit is detected Verify 900 2000 ohms resistance through sensor circuit Verify no DC voltage through sensor circuit Key...

Page 72: ...ings or excessive hub runout Check sensor wiring and connectors for intermittent contact Check condition of ABS sensor head Check mounting of tone ring and condition of teeth Check condition and reten...

Page 73: ...ontinuity between the sensor connection and battery voltage short circuit is detected Verify 900 2000 ohms resistance through sensor circuit Verify no DC voltage through sensor circuit Key ON Check fo...

Page 74: ...ttent contact Check condition of ABS sensor head Check mounting of tone ring and condition of teeth Check condition and retention of ABS sensor spring clip Check ABS sensor cable routing and clipping...

Page 75: ...Disabled Continuity between the sensor connection and battery voltage short circuit is detected Verify 900 2000 ohms resistance through sensor circuit Verify no DC voltage through sensor circuit Key...

Page 76: ...ings or excessive hub runout Check sensor wiring and connectors for intermittent contact Check condition of ABS sensor head Check mounting of tone ring and condition of teeth Check condition and reten...

Page 77: ...HSA Disabled Continuity between the sensor connection and battery voltage short circuit is detected Verify 900 2000 ohms resistance through sensor circuit Verify no DC voltage through sensor circuit K...

Page 78: ...rings or excessive hub runout Check sensor wiring and connectors for intermittent contact Check condition of ABS sensor head Check mounting of tone ring and condition of teeth Check condition and rete...

Page 79: ...HSA Disabled Continuity between the sensor connection and battery voltage short circuit is detected Verify 900 2000 ohms resistance through sensor circuit Verify no DC voltage through sensor circuit...

Page 80: ...rings or excessive hub runout Check sensor wiring and connectors for intermittent contact Check condition of ABS sensor head Check mounting of tone ring and condition of teeth Check condition and rete...

Page 81: ...0 ohms for 24v system Verify resistance through harness and valve together is the same as valve by itself Check for corroded or damaged wiring between the ECU and the modulator valve Right Front Modu...

Page 82: ...0 ohms for 24v system Verify resistance through harness and valve together is the same as valve by itself Check for corroded or damaged wiring between the ECU and the modulator valve Right Rear Modula...

Page 83: ...0 ohms for 24v system Verify resistance through harness and valve together is the same as valve by itself Check for corroded or damaged wiring between the ECU and the modulator valve Right Third Axle...

Page 84: ...ol is Disabled Continuity between the retarder relay output and ground has been detected Check for continuity between the retarder relay output and ground Check for corroded or damaged wiring between...

Page 85: ...ld be used for EAP functionality See EAP maintenance manual MM 1696 for further instructions 802 14 4 8 1 Supply Voltage is too Low ABS WL while supply voltage is detected as too low ABS Wheel Disable...

Page 86: ...ear 803 15 7 8 3 Internal Voltage Supply ABS WL ABS Wheel Disabled ESC RSC ATC HSA Disabled A failure was detected on the internal ECU relay 2 Measure the battery or ignition voltage supply Verify vol...

Page 87: ...ntinuity between suspect ABV ground circuit and voltage supply Check for corroded or damaged wiring between the ECU and ABV 807 19 2 7 6 ABV Front Axle Open Circuit ABS WL ESC RSC ATC HSA Disabled ECU...

Page 88: ...fault is present the operator should perform Reset Memorized Components through TOOLBOX Software procedure If SLC ECU may indicate issue with Diff lock solenoid or transfer case lock solenoid 807 19...

Page 89: ...Pressure Sensor Shorted to Ground ABS WL ESC RSC ATC HSA Disabled Continuity between pressure signal circuit and ground short circuit or an open circuit is detected Verify if connectors are fully sea...

Page 90: ...bled Continuity between pressure signal circuit and ground short circuit or an open circuit is detected Check for continuity between pressure sensor signal circuit and voltage supply Check connectors...

Page 91: ...lication Contact vehicle OEM to verify broadcast of HSA switch is correct ESC 520210 88 1 N A ESC Initialization Not Complete ATC WL Blinking ESC Disabled ECU has recognized that the ESC module is cur...

Page 92: ...ABS ECU and ESC has been correctly calibrated Follow the ESC Initialization End of Line calibration Refer to Section 8 520210 88 13 8 6 ESC Initialization required ATC WL ESC Disabled The system has d...

Page 93: ...if fault persists 1807 89 12 8 6 SAS Failure ATC WL ESC Disabled The Steering Angle Sensor is communicating an internal error to the ABS ECU Check CAN wiring between ABS ECU and SAS for interruptions...

Page 94: ...en EEC1 broadcasts from the engine or the message content is not as expected Contact OEM to verify J1939 wiring between engine ECU and vehicle J1939 backbone is correct and messages are correct If ABS...

Page 95: ...e ECU memorized system is not in accordance with the harness There are loads detected at outputs which should be open circuits Wheel parameters number of tone ring teeth or tire size are out of tolera...

Page 96: ...ect ABS WL ESC Disabled The stability control parameters set in the ECU are not in accordance with what is detected or learned on the vehicle Contact vehicle OEM to obtain correct ECU part number for...

Page 97: ...ated too long during diagnostic testing Internal ECU communication is not correct Reset ECU by cycling the ignition or by using the reset option in TOOLBOX If fault persists check ABS ECU powers groun...

Page 98: ...records a fault This can occur if an ECU is moved from one truck to another and one or more of the memorized components are not available on the new truck If this occurs use TOOLBOX Software to reconf...

Page 99: ...ion ON 2 Press and hold the blink switch for at least three seconds NOTE Do not hold this switch longer than seven seconds The ABS lamp displays the ABS system configuration code One blink 6S 6M 6X2 T...

Page 100: ...hree times one second each with a one second pause between each Turn the ignition OFF The ABS lamp displays four quick flashes followed by a continuous display of the system configuration code NOTE Th...

Page 101: ...dditional faults must not be active Any other faults must be resolved before one of the main menu items is available NOTE To prevent incorrect activations SAS Calibration and ESC Initialization must b...

Page 102: ...pear Select the option End of Line Figure 9 5 Figure 9 5 If you are using TOOLBOX Software version 11 or higher click on Components button A drop box will appear Select ESC then select Start EOL Figur...

Page 103: ...t some point Click on Yes to recalibrate SAS Figure 9 10 NOTE The vehicle needs to be sitting still during SAS calibration Figure 9 9 NOTE Depending on your version of TOOLBOX Software the message in...

Page 104: ...s Press the space bar or click the Continue button when ready to proceed Figure 9 13 The ATC lamp will start blinking to inform driver ECU is in learning mode Figure 9 13 Tip Carefully follow the inst...

Page 105: ...these vehicles the ATC lamp will go out Follow the instructions on the screen The screen will automatically change to the next portion of the procedure Figure 9 15 Figure 9 15 Tip The vehicle MUST com...

Page 106: ...End of the Line data and ratios Figure 9 17 Make sure to stop the vehicle once steering ratio calculation has been completed NOTE The circle driving Calculation of Steering Ratio can be done in segme...

Page 107: ...nufacturer procedure to make sure ignition is turned off When the ignition is turned back ON check that no active or stored faults are logged in the ECU and that the ABS and ATC ESC warning lamps are...

Page 108: ...ization required SPN 520210 FMI 14 CAUTION Additional faults must not be active Any other faults must be resolved before one of the main menu items is available NOTE To prevent incorrect activations S...

Page 109: ...Upon successful calibration the status box will display SAS Calibration message sent successfully Figure 10 5 Figure 10 5 The SAS calibration is now completed Click the Close button to close the scree...

Page 110: ...turn to complete the initialization procedure At this point the ATC lamp will turn off indicating the ESC initialization was successful For the ECU to be able to save ratios and ESC EOL data the ignit...

Page 111: ...utton to close the screen NOTE If ESC EOL initialization was not properly completed and or ratios correctly saved code SPN 520210 88 FMI 14 will be active Follow the ESC initialization again and make...

Page 112: ...nostic connector likely do not have J1939 communication to the ABS ECU available so aftermarket programming will not be possible NOTE If you do not have the required diagnostic adapter or minimum vers...

Page 113: ...n Files button at the top of the screen NOTE If TOOLBOX Software is not available at the point of service it can be purchased by clicking the TOOLBOX Software button Figure 11 3 Figure 11 3 Enter the...

Page 114: ...tion all fields can be edited When the correct contact details are displayed click Bill to this address Figure 11 7 Figure 11 7 The select payment method screen appears next Enter the credit card info...

Page 115: ...the recommended file storage location Press OK to continue with saving the file Figure 11 11 Figure 11 11 When the following screen is displayed press Save to continue with saving the file Figure 11 1...

Page 116: ...WABCO programming operation NOTE It is recommended that aftermarket programming be completed with ignition on only Do not cycle the key until the programming operation is complete Verify the battery i...

Page 117: ...green PASS indicator will appear at the bottom of the Aftermarket Programming application window Figure 11 18 Figure 11 18 If the programming operation fails for any reason a red FAIL indicator will a...

Page 118: ...the configuration session Close the TOOLBOX Software reopen it and restart the aftermarket programming application If the problem persists repeat with key on only Engine Off This failure will also oc...

Page 119: ...U that does not require aftermarket programming Verify the ECU does not require programming and refer to the SPN SID FMI Fault Codes section in this manual 253 630 2 ABS WL B12 Unable to read paramete...

Page 120: ...on session Close the TOOLBOX Software reopen it and restart the aftermarket programming application If the problem persists repeat with key on only Engine Off This failure will also occur when one or...

Page 121: ...ct WaBCO North America Customer Care at 855 228 3203 Close the TOOLBOX Software reopen it and restart the aftermarket programming application If the problem persists repeat with key on only Engine Off...

Page 122: ...re information visit www wabco na com NYSE WBC is a lead ing global supplier of technolo gies and services that improve the safety efficiency and connectivity of commercial vehicles Founded nearly 150...

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