Volkswagen CJDA Workshop Manual page 88

3
Industriemotoren - Industrial Engines 2009 ▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
Indicated on display
08488/P2128
Accelerator pedal posi-
tion sender 2
Signal too large
08504/P2138
Accelerator pedal posi-
tion senders 1/2
-G79+G185-
Implausible signal
08518/P2146
Voltage supply of injec-
tor(s) A
Open circuit
08521/P2149
Voltage supply of injec-
tor(s) B
Open circuit
72
Repair Group 01 - Vehicle self-diagnosis
Possible cause of fault Possible effects
◆ Wire open circuit or
wire has short to
earth
◆ -G185- defective
◆ Open circuit or line
short-circuit
◆ -G79/G185- defective
◆ Open circuit or line
short-circuit
◆ -N30...N33- defective
◆ Open circuit or line
short-circuit
◆ -N30...N33- defective
◆ Torque is considerably
reduced above
3000 rpm
◆ Torque is considerably
reduced above
3000 rpm
◆ Engine stalls
◆ Engine stalls
Fault remedy
– Electrical test: con-
nectors, short to posi-
tive in cable
– -G79- Check.
⇒ P age 316
– Electrical test: con-
nectors, check cables
for contact resistance
between sensors 1
and 2.
– The sensors may
have to be renewed
– -N30...N33- Check.
⇒ P age 398
– Check wires (high and
low) of injectors for
short to positive/earth.
– Check one high wire
of bank A for short-cir-
cuit to another high
wire of bank A. If OK,
check injectors. If OK,
renew ECU.
– -N30...N33- Check.
⇒ P age 398
– Check wires (high and
low) of injectors for
short to positive/earth.
– Check one high wire
of bank A for short-cir-
cuit to another high
wire of bank A. If OK,
check injectors. If OK,
renew ECU.