Bosch OBD 100, Original Instructions Manual, Page: 9 / 20

Operation | OBD 100 | 9 en
569624 Rev "A" 2013-12-19
|
Robert Bosch GmbH
5.4 Codes (trouble codes)
5.4.1 Reading trouble codes
1. Switch on the ignition (position 2).
2. Connect the OBD 100 to the vehicle.
 Data are read.
3. In the main menu select "1) Codes" and
confirm with
E .
i
Alternatively, press and hold

READ for
2 seconds.
i
If the vehicle does not have any DTCs, "No
Codes" will be displayed.
 One or more trouble codes is/are displayed.
Fig. 3: Trouble code display - description from top left
to bottom right
1 Trouble code
2 Type of trouble code (see Tab. 5)
3 Trouble code number, continuously changing display
(see Tab. 6)
4 Note on scrolling (see Tab. 7)
5 Trouble code description (moving message with long
descriptions)
Type Function
Pnd Pending code
Cnf Confirmed code
Prm Permanent code
Tab. 5: Type of trouble code
Number Function
Mod ## Indicates the module (electronic control
unit) which transmitted the trouble code.
## stands for consecutive numbering of
electronic control units
#/# Indicates the sequence of the trouble code
and the number (trouble code x of n).
Example: The display 2/9 means the 2nd of
9 trouble codes reported by the electronic
control unit.
Tab. 6: Trouble code number
Scroll Function
↑
Scrolling up possible.
↓
Scrolling down possible.
↕
Scrolling up and down possible.
Tab. 7: Scrolling
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Scroll through trouble codes using

READ or

ERASE.
5.4.2 Erasing trouble codes
!
The function "Erase trouble codes" is not to
be performed until the systems have been
fully checked and the trouble codes written
down.
!
Do not erase the trouble codes before
establishing whether repair is necessary.
Failure to perform essential repairs
could prove costly and dangerous. If the
malfunction indicator light (MIL) is reset
without the underlying problem having
been rectified, the indicator light will come
on again. If the underlying problem is of a
serious nature, further trouble codes may
be set or the fault may be aggravated if
appropriate action is not taken. It is not
sufficient to just erase the trouble codes and
reset the warning light. The underlying fault
must be rectified.
!
Before erasing trouble codes it must be
remembered that this procedure also erases
all the freeze frame data and the status of
the on-board monitoring (status mask). As a
result, exhaust emission testing performed
immediately after erasing may not be
successful if the vehicle has not completed
its internal tests by then.
i
Once the vehicle has been serviced any
trouble codes stored can be erased if so
desired. If a trouble code appears again, this
means that the problem has not yet been
rectified or other faults have occurred.
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All trouble codes are displayed with the
corresponding icon.