Volkswagen CJDA Workshop Manual page 70

3
Industriemotoren - Industrial Engines 2009 ▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
Indicated on display
Short to earth
01378/P0562
Voltage supply
Voltage too low
01379P0563
Voltage supply
Voltage too great
01538/P0602
Control unit coding
Malfunction
01541/P0605
Control unit defective
01542/P0606
Control unit defective
54 Repair Group 01 - Vehicle self-diagnosis
Possible cause of fault Possible effects
◆ Wiring short to earth
◆ -G235- defective
◆ Invalid control unit
coding for engine
control unit -J623-
◆ Internal defect in en-
gine control unit
-J623-
◆ Internal defect in en-
gine control unit
-J623-
◆ Torque limiting; diesel
particulate filter regen-
eration is locked
◆ Several effects possi-
ble, since ECU is co-
ded incorrectly
◆ Various running prob-
lems
◆ Engine stops
◆ Project-specific. Alter-
native function de-
pends on which com-
ponents are controlled
via which output
stage, project-specific.
SPI output stages not
functional / cannot be
diagnosed
Fault remedy
– -G235- Check.
⇒ P age 347
– Pull off temperature
sensor => sensor raw
voltage in measured
value block "Exh_uR-
awTTrbnUS" approx.
reference voltage
(3.3 V) ⇒ sensor de-
fective, sensor raw
voltage in measured
value block approx.
0 V ⇒ check wire to
ECU
– Wire to ECU OK, ECU
defective
– Check voltage supply
for engine control unit
⇒ P age 417
-J623-
– Check voltage supply
for engine control unit
⇒ P age 417
-J623-
– Possible open circuit
on terminal 87
– Recode/flash engine
control unit -J623- (as
specified by manufac-
turer), or renew it
– -J623- Renew
⇒ P age 418
– -J623- Renew
⇒ P age 418