Description of On-Board Diagnostics

DIAGNOSTIC METHODS

As the system's inbuilt self-diagnosis continuously monitors and registers most faults, both permanent and intermittent that may arise, it is very easy to pinpoint a fault with the diagnostic instruments, attend to it and then check that the system is free of faults.

Fault diagnosis can be carried out using various methods. The same system can be analyzed using one or more diagnostic methods.
- Special test units
- Lamp-flash codes
- ISAT scan tool

To make it easier to take readings on the various systems, the measuring points can be "moved out" using a breakout box (BOB).
The breakout box is connected to the system's control module.





Systems with Diagnosis by Means of Special Test Units





Systems with Diagnosis by Means of Lamp-Flash Codes





Systems with Diagnosis by Means of an ISAT Scan Tool