WABCO iABS 2S/1M Standard, Maintenance Manual

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Diagnostics
6 Diagnostics
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.
WARNING
The ABS is an electrical system. When you work on the ABS, take the same precautions that you must
take with any electrical system to avoid serious personal injury. As with any electrical system, the danger
of electrical shock or sparks exists that can ignite
fl ammable substances. You must always disconnect
the battery ground cable before working on the electrical system.
There are two methods used to get fault information from the ECU:
 TOOLBOX PLUS™ Software
 Blink code diagnostics
• Ignition power activation
There is also a new diagnostic tool for checking PLC, the Heavy Duty Trailer Diagnostic adapter. Figure 6.1.
Fig. 6.1
4017175 a
Available from Noregon, not provided by WABCO.
6.1 Important PLC Information for Blink Code Diagnostics
Blink Code 17 indicates a PLC failure. If PLC does not seem to be operating correctly, but there is no Blink
Code 17, the ECU is functioning correctly and does not need to be replaced; however, there could be a
problem in the trailer’s wiring harness. Check the wiring system and make the necessary repairs.