Volkswagen Golf / Golf GTI / Golf Variant. Manual - part 174
DTC /
Descrip‐
tion
Monitor
Strategy
Descrip‐
tion
Malfunction Crite‐
ria and Threshold
Value
Secondary Parame‐
ters with Enable
Conditions
Monitor‐
ing Time
Length
MIL Il‐
lum.
Component Diag‐
nostic Procedure
P2279
MAP/
MAF -
Throttle
Position
Correla‐
tion
Intake Air
System
Rationali‐
ty Check
• Filtered lamb‐
da controller in‐
cluded correc‐
tion and adap‐
tation -30.0 –
30.0 %
• Lambda con‐
trol active
• And
• Deviation throt‐
tle area control‐
ler > 60.0 %
• Throttle position
> 0.0° TPS
• Throttle position
< 100.003° TPS
• Engine speed >
576; < 3,008
RPM
• Modeled pres‐
sure quotient >
0.27; < 0.57 [-]
• Engine running
• Throttle actuator
commanded on
• Time after engine
start > 5.0 s
• Throttle position
sensor failure not
detected
• Fuel cut off not
active
• Fast throttle
adaptation finish‐
ed
• Gradient intake
manifold pres‐
sure -199.90 –
199.90 kPa/s
• Engine speed
limitation not ac‐
tive
• Barometric pres‐
sure plausibility
diagnosis finish‐
ed
• Intake manifold
modeled adap‐
tion active
• And
• Choice of:
• MAF sensor ac‐
tive
• Or
• Manifold pres‐
sure sensor ac‐
tive
• And
• Choice of:
• Pressure up‐
stream throttle <
135.0 kPa
• 5.0 s
• Con‐
tinu‐
ous
• 2
DCY
– Check visually
for air leaks be‐
tween intake
and throttle
body, oil fill cap
not tight or oil
dipstick not
seated in tube.
– Also visually in‐
spect any en‐
gine gaskets
that can cause
additional air to
enter the crank‐
case can set this
fault as the PCV
system is not
metered. If a
vacuum leak or
crankcase gas‐
ket sealing is at
cause, the idle
may be rough or
unstable.
– Check the In‐
take Manifold
Sensor - GX9- .
Refer to
GTI 2014 ➤
Generic Scan Tool - Edition 04.2015
3. Diagnosis and Testing
369