Malfunction Indicator Light; Parameter Identification - Bosch OBD 100 Original Instructions Manual

MIL

Malfunction indicator light

The malfunction indicator light (also called
malfunction lamp or engine warning lamp) comes
on:
R
If the ignition key is in position II (bulb check
function).
R
If a fault occurs during the electronic control
unit self-test.
R
If an emission-related fault occurs in two
consecutive drive cycles.
R
If a fault (misfiring) occurs which results
in cylinder deactivation, i.e. for catalytic
converter protection (the MIL flashes in this
case).
i
The malfunction indicator light goes out
automatically in the fourth drive cycle if
the fault has no longer occurred in three
consecutive drive cycles.
OBD On-Board diagnosis
In these operating instructions, OBD is always
used to refer to the standard OBD-2. In the EU,
OBD-2 (EOBD) was introduced for new vehicles
with gasoline engine in January 2001 with the
EURO-3 standard and for diesel passenger
vehicles in January 2003.
i
Vehicles marketed before these dates may
however also be provided with OBD.
OBD-2 Refer to OBD
PID

Parameter identification

Status information, actual values and electronic
control unit values calculated by the system are
output by way of PID (refer also to Section 9).
Pnd Pending code
The first time a fault occurs this is stored as a
pending code in the fault memory. This fault
appeared during a drive cycle but was not
sufficient to set the MIL status to ON.
Robert Bosch GmbH
Glossary | OBD 100 | 15
Prm Permanent code
Permanent codes are a special form of
confirmed codes. Permanent codes were first
set by vehicles around 2010, which means that
they are not supported by all vehicles. Whereas
confirmed codes can be erased by way of the
diagnostic tester, this is not possible in the
case of permanent codes. Permanent codes are
erased by the vehicle if the electronic control
unit has decided that the fault no longer exists.
Readiness code
Refer to I/M monitors
VIN Vehicle identification number
The vehicle identification number is the serial
number assigned to a vehicle at the factory.
The vehicle identification number is marked
on the driver side of the dashboard and can
be seen from outside the vehicle. The vehicle
identification number contains information
on the vehicle, as well as the body and engine
code numbers for example. Provided that the
electronic control unit has not been replaced,
the vehicle identification number displayed in
the OBD 100 must coincide with the vehicle
identification number of the vehicle. Matching
numbers ensure that the correct diagnostic data
are being displayed. It is advisable to consult a
workshop if the vehicle identification numbers
do not match.
569624 Rev "A"
en
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2013-12-19