Volkswagen CJDA Workshop Manual page 51

Indicated on display
No signal
00273/P0111
Intake air temperature
sender -G42-
Implausible signal
00274/P0112
Intake air temperature
sender -G42-
Signal too low
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
◆ -G70- defective
◆ Open circuit or line
short-circuit
◆ -G42- defective
◆ Wiring open circuit or
wiring short to posi-
tive
◆ -G42- defective
Industriemotoren - Industrial Engines 2009 ▶
◆ EGR is switched off.
Diesel particulate filter
regeneration sup-
pressed
◆ Driving dynamics not
or barely impaired,
because a good alter-
native value is used.
Possible breakdown
due to full DPF (con-
sequential fault)
◆ No limitation
◆ Torque limiting; diesel
particulate filter is
locked
3
Fault remedy
– -G70- Check.
⇒ P age 411
– Check whether there
is an electrical fault in
wire or wiring harness
(short to positive or to
earth, or open circuit).
If not ⇒ renew sensor
– After road test fault in
event memory ⇒ re-
new ECU (there is no
other way to test the
air mass meter,
maybe with a frequen-
cy generator)
– Check intake air tem-
perature sender -G42-
⇒ P age 404
– Comparison of all
temperatures with
completely cooled
down engine and ter-
minal 15 ON / engine
OFF
– Electrical check of
sensor wires. Possibly
auxiliary heater coded
incorrectly
– -G42- Check.
⇒ P age 404
– Pull off temperature
sensor ⇒ sensor raw
voltage in measured
value block "Air_uR-
awTCACDs" 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
3 List of fault codes 35