Volkswagen CJDA Workshop Manual page 59

Indicated on display
Electr. fault in circuit
00564/P0234
Charge pressure control
Control limit exceeded
00567/P0237
Charge pressure sender
-G31-
Signal too low
00568/P0238
Charge pressure sender
-G31-
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
Possible cause of fault Possible effects
◆ Open circuit or line
short-circuit
◆ -N33- defective
◆ Defective charge
pressure control sole-
noid valve -N75-
◆ Hose connections in-
terchanged, not con-
nected
◆ Leak in charge air
system
◆ Open circuit or line
short-circuit
◆ -G31- defective
Industriemotoren - Industrial Engines 2009 ▶
◆ Engine is switched off
◆ Engine fails
◆ Torque limiting; regen-
eration is locked
◆ Torque limiting; regen-
eration is locked
3
Fault remedy
– -N33- Check.
⇒ P age 398
– Check for short to
positive on injector 4
(high- and low-wire). If
OK, check injector. If
OK, renew ECU.
– Check -N75-
⇒ P age
89, final
control diagnosis
– Checking charge
pressure control
⇒ P age
333.
– Checking charge air
system for leaks
⇒ P age 331
– -G31- Check.
⇒ P age 343
– Checking charge
pressure control
⇒ P age
333.
– Pull off pressure sen-
sor, and apply a refer-
ence voltage (5 V) to
the signal line => sen-
sor raw voltage in
measured value block
"Air_uRawP-
CACDs"=reference
voltage => sensor de-
fective => sensor raw
voltage in measured
value block=reference
voltage => check sen-
sor wire to ECU
– Wire to ECU OK, ECU
defective
3 List of fault codes 43