Advanced Automotive Fault Diagnosis

Vehicle workshops operate in a very competi-
tive environment and have to be able to carry out
demanding repair work efficiently, to a high stand-
ard and at a competitive price on a wide range of
vehicle makes and models. The Bosch KTS con-
trol-unit diagnostic testers, used in conjunction
with the comprehensive Esitronic workshop soft-
ware, offers the best possible basis for efficient
diagnosis and repair of electrical and electronic
components. The testers are available in different
versions, suited to the individual requirements of
the particular workshop: The portable KTS 650
with built-in computer and touch-screen can be
used anywhere. It has a 20 GB hard drive, a
touch-screen and a DVD drive. When being used
away from the workshop, the power supply of
the KTS 650 comes from the vehicle battery or
from rechargeable batteries with one to two hours’
service life. For use in the workshop, there is a
tough wheeled trolley with a built-in charger unit.
As well as having all the necessary adapter cables,
the trolley can also carry an inkjet printer and an
external keyboard, which can be connected to 
the KTS 650 via the usual PC interfaces (Figure
3.16).
The Esitronic software package accounts for
the in-depth diagnostic capacity of the KTS diag-
nostic testers. With the new common rail diesel
systems, for example, even special functions such
as quantitative comparison and compression test-
ing can be carried out. This allows for reliable
diagnosis of the faulty part and avoids unneces-
sary dismantling and re-assembly or the removal
and replacement of non-faulty parts.
Modern diagnostic equipment is also indispens-
able when workshops have to deal with braking
systems with electronic control systems such as
ABS, ASR and ESP. Nowadays, the diagnostic
tester may even be needed for bleeding a brake
system.
In addition, KTS and Esitronic allow independ-
ent workshops to reset the service interval warn-
ing; for example, after an oil change or a routine
service, or perhaps find the correct default pos-
ition for the headlamps after one or both of these
have been replaced.
As well as ISO norms for European vehicles
and SAE norms for American and Japanese 
vehicles, the KTS testers can also deal with CAN
norms for checking modern CAN bus systems,

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