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3 Diagnostics, Troubleshooting and Testing
13
Meritor WABCO Maintenance Manual MM-0112 (Revised 05-13)
Diagnostics
Use any of the following methods to diagnose E version ECUs:
앫 Meritor Wabco TOOLBOX™ Software, a PC-based diagnostic
and testing program that runs in Microsoft Windows
XP, Vista
or Windows 7 operating system.
앫 Blink Codes. Refer to the information in this section.
앫 OEM Diagnostic Displays. Refer to the vehicle operator’s manual.
If you have any questions about system diagnostics, please contact
the Meritor Wabco OnTrac Customer Service Center at 866-OnTrac1
(668-7221).
TOOLBOX™ Software Diagnostics
For complete instructions for installing and using TOOLBOX™
Software, refer to the User’s Manual posted on meritorwabco.com.
Meritor WABCO TOOLBOX™ Software provides computer-based
diagnostic capabilities for the complete range of Meritor WABCO
vehicle control systems. The program provides the following
functions:
앫 Displays both static (e.g., ECU number) and dynamic (e.g.,
RPMs) information from the system under test.
앫 Displays both active and stored system faults, as well as the
appropriate repair instructions.
앫 Activates system components to verify system integrity, correct
component operation and installation wiring.
To display E version ABS, RSC, ESC or HSA faults:
1. Connect the computer to the vehicle:
앫 Attach the USB/serial cable from your computer’s USB or
serial port to the adapter.
앫 Attach the Deutsch diagnostic cable from the adapter to the
vehicle. Figure 3.3.
Figure 3.3
2. Select the TOOLBOX™ Software icon from the desktop or from
the Windows
Start Menu to display the Main Menu.
3. Depending on the software version used, there will be two
options to communicate with the vehicle:
앫 If using TOOLBOX™ 11 or higher and a vehicle with
Software ECU E4.4b or higher, diagnostics over J1939
communications can be possible. Figure 3.4.
앫 J1708 communications are possible with any TOOLBOX™
Software version and any D or E Version ECU. Figure 3.5.
Ignition ON Normal Operation ABS lamp comes on at ignition
momentarily for a bulb check,
then goes out.
System is OK.
After servicing ABS
components
ABS lamp does not go out at
ignition.
When vehicle is driven at speeds
above 4 mph (6 km/h), lamp
goes out. System is OK.
Off-road ABS operation. Refer
to the off-road ABS information
in this section.
ABS lamp flashes during
vehicle operation.
The vehicle’s normal ABS
function is being modified due to
road conditions.
Existing fault or lamp issue ABS lamp does not go out at
ignition.
Lamp does not go out at speeds
above 4 mph (6 km/h) — a fault
may exist in the ABS system or
lamp is permanently shorted.
ON
OFF
1002005a
Figure 3.3
4010610a
TO VEHICLE
DEUTCH
CONNECTOR
USB OR
SERIAL CABLE
ADAPTER
- 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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