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4 Component Replacement
37
Meritor WABCO Maintenance Manual MM-0112 (Revised 05-13)
4 Component Replacem ent
Hazard Alert Messages
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
To prevent serious eye 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.
Component Removal and Installation
Wheel Speed Sensors
Sensor Lubricant Specification
Meritor WABCO specifications call for a sensor lubricant with the
following characteristics:
Lubricant must be mineral oil-based and contain molydisulfide. It
should have excellent anti-corrosion and adhesion characteristics,
and be capable of continuous function in a temperature range of
−40° to 300°F (−40° to 150°C).
Lubricants approved for use on Meritor WABCO sensors and spring
clips are as follows. Figure 4.1.
앫 Mobilith SHC-220 (Mobil)
앫 TEK 662 (Roy Dean Products)
앫 Staburags NBU 30 PTM (Kluber Lubrication)
앫 Valvoline EP 633
Figure 4.1
Removal
NOTE: When replacing the wheel speed sensor, the sensor spring
clip must also be replaced.
WARNING
Park the vehicle on a level surface. Block the wheels to
prevent the vehicle from moving. Support the vehicle with
safety stands. Do not work under a vehicle supported only by
jacks. Jacks can slip and fall over. Serious personal injury and
damage to components can result.
1. Place blocks under the tires to stop the vehicle from moving.
Apply the parking brake.
2. If necessary, raise the tires off the ground. Place safety stands
under the axle.
3. Depending on the axle, wheel hub and brake configurations,
some components might have to be removed to obtain access
to wheel speed sensor. Follow the vehicle OEMs guidelines to
gain access to wheel speed sensor.
4. Disconnect the fasteners that hold the sensor cable to other
components.
5. Disconnect the sensor cable from the chassis harness.
6. Remove the sensor from the sensor holder. Use a twisting
motion if necessary. Do not pull on the cable. Figure 4.2 and
Figure 4.3.
Figure 4.1
4004479a
SENSOR
SPRING
CLIP
WHEEL SPEED
SENSOR
- For E Version ECUs 1
- 12-Volt and 24-Volt Systems 1
- Contents 3
- 1 Introduction 5
- System Components 5
- ATC Components 10
- ATC Switch 10
- XX Orientation 11
- ZZ Orientation 12
- YY Orientation 12
- ESC Components 13
- Figure 2.8 14
- Hill Start Aid (HSA) 15
- Maintenance Information 16
- ABS Indicator Lamp 16
- Diagnostics 17
- TOOLBOX™ Software Diagnostics 17
- 4010611a 18
- 4010612a 18
- 4010613a 18
- 4010614a 18
- Definitions 19
- Clear Mode 20
- Blink Code Illustrations 22
- Blink Code Conditions 23
- Blink Code Identification 24
- Wheel Speed Sensor Testing 25
- Modulator Valve Testing 26
- BAYONET-STYLE CONNECTOR 27
- OPEN-STYLE CONNECTOR 27
- CAB MOUNT ECU’S: 28
- Figure 3.18 29
- 4010617a 30
- 4010619a 30
- 4010620a 30
- Electrical Checks 31
- Software 32
- Figure 3.26 or Figure 3.27 33
- PRESSURE SENSOR CONNECTOR 34
- ESC CAN Network Testing 35
- ESC Module Testing 35
- ESC Module Mounting 36
- ECU Circuit Testing 38
- Figure 3.44 40
- Figure 3.45 40
- 4 Component Replacement 41
- Hazard Alert Messages 41
- 472 500 30. 0 44
- MADE IN GERMANY 44
- 001 20/98 44
- DO NOT MOVE OR RELOCATE 49
- 6S/6M ABS 51
- 4S/4M ABS/ATC 51
- 4S/4M RSC/ATC 52
- 4S/4M ESC/ATC 52
- ECU Connector Pin Assignments 53
- ECU (Frame-mounted) 54
- 4004027d 55
- 4004030i 56
- Figure 6.8 57
- Figure 6.9 58
- Figure 6.10 59
- Figure 6.11 60
- Figure 6.12 61
- Figure 6.13 62
- Figure 6.14 63
- 7 SPN SID FMI Fault Codes 64
- SPN SID FMI Fault Code List 64
- 4010669a 88
- 4010670a 88
- 4010671a 88
- 8 Appendix I 89
- 9 Appendix II 91
- Troy, MI 48084-7121 98
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