WABASH COMMUNICATIONS MBS-1P Installation Manual Download Page 43

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MBS-1P Installation

322UX004

MBS-1P

ECM

Front Axle Sensors

Rear Axle Sensors

Power Diagnostic Cable

7-Pin

J560

ABS

Malfunction

Lamp (Wht/Green)

Trailer Mounted

ABS Malfunction Lamp

Diagnostic

Switch

Ground (White)

Auxiliary Power (Blue)

Stop Lamp Power (Red)

Stop Lamp

Power (Red)

Ground (White)

Switched 12V

Constant

Power From

Tractor (Blue)

Power

Cable

ECM Side

Trailer

Side

A-Stop Lamp Power (Red)
B-Auxiliary Power (Blue)
C-Not Used
D-ABS Malfunction Lamp (W/G)
E-Ground (White)

Diagnostic Switch

Harness

Side

Malfunction

Lamp Side

Front Speed Sensor (Road Side)

Front Speed Sensor (Curb Side)

Rear Speed Sensor (Road Side)

Rear Speed Sensor (Curb Side)

ECM Side

Wheel Side

Figure 23, MBS-1P Electrical Schematic

MBS-1P Electrical Schematic

Summary of Contents for MBS-1P

Page 1: ...MBS 1P Installation Guide APRIL 2003 Heavy Duty Trailer ABS by Wabash National...

Page 2: ...THE SAFETY AND OPERATING INSTRUCTIONS IN THIS MANUAL Due to a policy of continuous product improvement we reserve the right to make changes at any time without notice in prices materials colors specif...

Page 3: ...ocation Top of ECM The Letter P in this Area The Letter P in this Area Top of ECM MBS Identification Before service or diagnostics is performed on a Wabash MBS unit the system design must be verified...

Page 4: ...d Sensor Cables 14 MBS 1P Cable Options 14 Circuit Requirements 16 Malfunction Lamp Diagnostic Switch 16 Pneumatic System 17 MBS 1P Location and Mounting 17 Plumbing Instructions 18 Relay Valve 20 Sen...

Page 5: ...ions The system can be configured with either two or four sensors and either one or two pneumatic control modules The Antilock Control Module ACM is separate from the service brake relay valve elimina...

Page 6: ...ABS components as well as interfacing with standard trailer components see Figure 1 Refer to Figures 2 and 3 for part number and description of Wabash parts 322UX023 R 12 Relay Valve Power Cable Malf...

Page 7: ...Cable 10800360 4S 2M Axle by Axle w 168 Power Cable 10800359 4S 2M Axle by Axle w 30 Power Cable 14401359 ABS Wiring Harness 1 yes 14401744 ABS Malfunction Lamp 1 yes Harness w Diagnostic Switch 12S0...

Page 8: ...X 2 FLASH THREE TIMES CURBSIDE SENSOR SIGNAL FRONT CURBSIDE ON 4 SENSOR SYSTEMS X 3 FLASH FOUR TIMES CURBSIDE SENSOR CONNECTION FRONT CURBSIDE ON 4 SENSOR SYSTEMS X 4 FLASH FIVE TIMES ROADSIDE SENSOR...

Page 9: ...timing have not been changed with the introduction of ABS Because the addition of ABS components can have an affect on air brake timing it is important to verify acceptable performance on new ABS inst...

Page 10: ...signals regarding the rate of wheel angular rotation to one or more controlling devices which interpret those signals and generate responsive controlling output signals 3 Transmitting those controllin...

Page 11: ...ler ABS have agreed to provide for proper antilock brake operation down to a minimum of 8 5 volts The ABS malfunction lamp will light if voltages drop too low to maintain reliable solenoid operation W...

Page 12: ...ogy The use of a power line carrier permits transmission of data between tractors and trailers without adding wires or connectors Data is transmitted as a series of high frequency chirps that appear o...

Page 13: ...s must be considered prior to installation of the MBS 1P Wabash recommends the following guideline for typical MBS 1P installations When locating the sensors on a 2S system choose the axle that locks...

Page 14: ...ONTROLLED AXLE SENSED AXLE One valve each side One valve each side One valve each side One valve each side CONTROLLED AXLES SENSED AXLE 322UX036 SPRING SUSPENSION AIR SUSPENSION SPRING SUSPENSION AIR...

Page 15: ...lve each side One valve each side One valve each side CONTROLLED AXLES CONTROLLED AXLE SENSED AXLES CONTROLLED AXLES CONTROLLED AXLE MBS 1P MBS 1P MBS 1P MBS 1P MBS 1P MBS 1P MBS 1P MBS 1P CONTROLLED...

Page 16: ...atic Control Module PCM combined as one unit However they are individually field replaceable The wheel sensor malfunction lamp and power harnesses are connected to the ECM Figure 7 Typical Electrical...

Page 17: ...service line enters and exits the PCM through integrated quick connect fittings The PCM also incorporates a quick exhaust valve that minimizes delays during brake release and helps purge contaminants...

Page 18: ...connectors MBS 1P Cable Options The MBS 1P can be configured with either a long or short power cable Refer to the system component charts on page 3 and 4 for specific system and part number informati...

Page 19: ...15 MBS 1P Installation Figure 9 MBS 1P Components and Connectors 322UX025 ECM Power Harness PCM Sensor Harnesses...

Page 20: ...M ES HO LD 3R D PR ES S FO R TH RE E SE CO ND S 1 SY STE MS WIT H 1 PC M DO NO T UT ILIZ E FLA SH CO DE 11 2 SY STE MS WIT H 2 SE NS OR S DO NO T UT ILIZ E FLA SH CO DE S 7 1 0 AN D SE NS OR S MA Y BE...

Page 21: ...number BLT 00650 1 4 20 x 3 1 2 for 1M systems BLT00732 1 4 20 x 5 1 2 for 2M systems NOTE Use the grade 8 bolts included with the MBS 1P installation kit The bolts must be inserted from the bracket...

Page 22: ...y valve TEV Circumstances where the TEV is supplied downstream of the MBS 1P then 1 4 airline must be used from the R 12 to the TEV Wabash requires the following pneumatic plumbing 1 From DEL of MBS 1...

Page 23: ...lider 322UX016 Relay Valves Note Actual Component Locations May Vary Bulkhead Feedthru Gladhand Spring Brake Service Brake MBS 1P TEV Supply Service 322UX014 Note Actual Component Locations May Vary P...

Page 24: ...re the PCM the straight through connection must be plumbed to the PCM and the branch connection to the TEV All airline used in this case can be 3 8 tubing because the PCM does not exhaust this portion...

Page 25: ...ng 2M Side Control Spring Suspension w Slider Bulkhead Feedthru Gladhand Spring Brake Service Brake MBS 1P Relay Valves TEV Supply Service 322UX015 Alternate Plumbing 2M Axle Control Spring Suspension...

Page 26: ...re the type of spindle being used A Identify whether the spindle is a TP type or a TN type with the tapered smaller end B Remove the rubber spindle boot from the axle C Clean the spindle completely wi...

Page 27: ...23 MBS 1P Installation 322UX039 ABS Wheel Hub with Tone Ring Non ABS Wheel Hub without Tone Ring Figure 14 ABS Wheel Hub Identification...

Page 28: ...200 MV AC and should increase if the wheel is spun faster 2 Check the service brakes for normal non ABS operation 3 Check the malfunction lamp for proper operation as follows Power up the trailer the...

Page 29: ...iagnostics The malfunction lamp is an important tool when assessing the status of the ABS system When the system is operating properly the malfunction lamp will illuminate briefly then go OFF every ti...

Page 30: ...4 FLASH FIVE TIMES ROADSIDE SENSOR SIGNAL FRONT ROADSIDE ON 4 SENSOR SYSTEMS X 5 FLASH SIX TIMES ROADSIDE SENSOR CONNECTION FRONT ROADSIDE ON 4 SENSOR SYSTEMS X 6 FLASH SEVEN TIMES CURBSIDE REAR SENS...

Page 31: ...Current Faults Faults that are active when the system is powered up causing the malfunction lamp to remain illuminated All current faults become stored faults after they are repaired Stored Faults Fau...

Page 32: ...down on the trailer brake lever in the cab 2 Power the auxiliary circuit blue for one second then power down for one second then power back up and allow the power to remain ON until the flash code has...

Page 33: ...Current fault codes cannot be cleared until the cause is corrected NOTE Power with a light tester or by turning the ignition ON and OFF newer models 322UX018 Figure 18 Accessing Current Fault Codes T...

Page 34: ...b 2 Power the auxiliary circuit blue for one second power down for one second power back up for one second power down for one second then power back up and allow the power to remain ON until the flash...

Page 35: ...railer brake lever Power the auxiliary circuit blue One second ON One second OFF One second ON One second OFF ON until flash code is identified The malfunction lamp will begin flashing a code The code...

Page 36: ...malfunction lamp will begin flashing rapidly for ten seconds signaling the system is in the fault clear mode The fault is actually cleared in the first fraction of a second but the delay is designed t...

Page 37: ...F and remain OFF No other stored faults exist Other stored faults exist The malfunction lamp will flash the next stored fault code then turn OFF then repeat the flash sequence for one minute Power the...

Page 38: ...onds to view the fault code For example to view a stored fault perform the following steps 1 Power the system using the stop lamp circuit red and or the auxiliary circuit blue until the malfunction la...

Page 39: ...Roadside rear sensor connection fault Check roadside rear sensor resistance and electrical connections 11 Secondary PCM fault Separate the ECM from the secondary PCM Check that the connector and sock...

Page 40: ...er exists It has no affect on normal malfunction lamp operation or ABS function A fault trace is a temporary record of an earlier fault that slightly modifies malfunction lamp operation but does not a...

Page 41: ...l illuminating for two seconds then turning OFF The fault trace is gone and will still be replaced by a stored fault in memory The fault trace can also be cleared in the shop by either of two methods...

Page 42: ...be faulty If the malfunction lamp does not illuminate on power up and the solenoids do not perform the self test check the following The MBS 1P may not be receiving power Check the Weather Pack 5 way...

Page 43: ...mp Power Red Ground White Switched 12V Constant Power From Tractor Blue Power Cable ECM Side Trailer Side A Stop Lamp Power Red B Auxiliary Power Blue C Not Used D ABS Malfunction Lamp W G E Ground Wh...

Page 44: ...s Current Faults Faults that are active when the system is powered up which cause the malfunction lamp to remain illuminated ECM Electronic Control Module Flash Code A series of flashes of the malfun...

Page 45: ...evious fault that slightly modifies malfunction lamp operation but does not affect ABS function Wheel Speed Sensors Located either in the front and or rear axle depending on the geometry of each parti...

Page 46: ...___________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________...

Page 47: ...2003 Wabash Technology Corp PGI57322 0403...

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