Erasing Trouble Codes - Bosch OBD 150 Manual Original

5.6

Erasing trouble codes

!
The function "Erase 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 estab-
lishing 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 aggra-
vated if appropriate action is not taken. It is
not sufficient to just erase the trouble codes
and reset the MIL. 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 suc-
cessful as the vehicle has not completed its
internal tests by then.
i
Once the vehicle has been serviced any trou-
ble 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.
Robert Bosch GmbH
All you need to know about OBD | OBD 150 | 37
Implementation of the "Erase Codes" function
results in the following:
R
Confirmed and pending codes are erased.
R
Freeze frame data results are erased (not
possible with all vehicles).
R
I/M monitors are set to "Not ready".
i
Permanent codes can only be erased by the
vehicle.
1. Switch on the ignition (position 2).
2. Connect the OBD 150 to the vehicle.
 Data are read.
!
Do not start the engine. The engine must not
be running when erasing the trouble codes.
3. In the diagnostic menu select "Erase Codes"
with or
READ ERASE
i
Alternatively press
 A confirmation message appears on the
screen.
i
Cancel the operation and return to the diag-
nostic menu with z.
Cancel the operation and read data again
with .
READ
4. Press E to erase trouble codes.
i
It may be necessary to drive the vehicle again.
569630 Rev "D"
.
for 3 seconds.
ERASE
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2016-02-19
en