about the failure by means of the data link connector (diagnosis connector). While engine failures are
identified, it is necessary to have a general idea of the on board diagnostic system as well as a perfect
knowledge of the safety measures to be observed during troubleshooting, and how to use a tester.
Therefore, carry out troubleshooting according to the operation diagram which specifies the correct
procedure to be followed.
European on board diagnostic system of vehi-
cles (EOBD)
The vehicles designed for the European market
are equipped with the following functions, comply-
ing with the standard 1999/102/EC (generally
called EURO-OBD)
1. With the ignition switch set to ON, the warning
light (MIL) turns on. If no operation failure is de-
tected, the warning light turns on, once the engine
is started (check if the bulbs are burnt).
2. If during the engine operation, the electronic control unit detects an operation failure in the emission
control system/components (which could negatively affect emissions), or in propeller control compo-
nents, or a failure is detected in the same control unit, the warning light turns on or flashes (only if an
irregular ignition which can damage the catalytic converter is detected). Therefore, the electronic control
unit stores the area that has an operation failure (failure code ISO 15031-6/SAEJ2012). If the failure is
not detected for three sequential times, the warning light turns on automatically. In any case, the failure
code is stored in the electronic control unit memory.
N.B.
- THE WARNING LIGHT TURNS ON ONLY IN CASE OF FAILURES AFFECTING VEHICLE EMIS-
SIONS
for example:
Diagnostic failure code P0105
Failure detected: Intake air absolute pressure failure / barometric pressure circuit failure
Diagnostic failure code: P0110
Failure detected: Intake air temperature circuit failure
Diagnostic failure code: P0115
Failure detected: Engine coolant temperature circuit failure
Diagnostic failure code: P0116
Failure detected: Circuit failure: engine coolant temperature/functional problems
PORTER 1.3 16V Iniection System
IS - 401
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