Vehicle Self-Diagnosis; Features Of Vehicle Self-Diagnosis; Technical Data Of Vehicle Self-Diagnosis; Read Version Of Engine Control Unit - Volkswagen CJDA Workshop Manual

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Industriemotoren - Industrial Engines 2009 ▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015

01 - Vehicle self-diagnosis

1 Vehicle self-diagnosis
Note
The engine control unit -J623- must be coded when the engine
is commissioned for the first time.

Features of vehicle self-diagnosis

Technical data of vehicle self-diagnosis

Connect vehicle diagnosis, testing and information system and
select Engine control unit
Connect test box to check lines
1.1 Features of vehicle self-diagnosis
The engine control unit -J623- is equipped with a event memo-
ry.
If faults occur in the sensors and components being monitored,
they will be stored in the event memory together with an indica-
tion of the type of fault.
After evaluating the information, the engine control unit decides
between different fault codes (see "Fault table"
and stores the matching fault code until the event memory is
cleared.
Faults which occur only temporarily (sporadically), are displayed
with the addendum "sporadic fault" "/SP". The cause of sporadic
faults can be, for example, a loose contact or a brief open cir-
cuit. If a sporadic fault does not occur again within 50 engine
starts, it will be cleared from the event memory.
If faults affecting the operation of the engine have been detec-
ted, the glow plug indicator lamp -K29- and/or the exhaust
emissions warning lamp -K83- light up.
The faults stored can be read using the vehicle diagnosis, test-
ing and information system -VAS 5051/B-
The event memory must be cleared after the faults have been
rectified.
Note
For general information on the vehicle self-diagnosis refer to the
operating manual for the vehicle diagnosis, testing and informa-
tion system -VAS 5051/B-.
1.2 Technical data of vehicle self-diagnosis

1.2.1 Read version of engine control unit

Connect the vehicle diagnosis, testing and information system
-VAS 5051/B-, and select the vehicle system "001-Engine elec-
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Repair Group 01 - Vehicle self-diagnosis
⇒ P age
22.
⇒ P age
22.
⇒ P age
23.
⇒ P age
24.
⇒ P age
⇒ P age
28)
23.