Volkswagen Golf / Golf GTI / Golf Variant. Manual — part 128
DTC /
Descrip‐
tion
Monitor
Strategy
Descrip‐
tion
Malfunction Crite‐
ria and Threshold
Value
Secondary Parame‐
ters with Enable
Conditions
Monitoring
Time
Length
MIL Il‐
lum.
Component Diag‐
nostic Procedure
P2279
MAP/
MAF -
Throttle
Position
Correla‐
tion
Intake Air
System
Rationali‐
ty Check
• General condi‐
tions:
• Filtered lamb‐
da controller in‐
cluded correc‐
tion and adap‐
tion -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; < 0.60 [-]
• 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
• Contin‐
uous
• 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.
GTI 2014 ➤
Generic Scan Tool - Edition 04.2015
3. Diagnosis and Testing
185
DTC /
Descrip‐
tion
Monitor
Strategy
Descrip‐
tion
Malfunction Crite‐
ria and Threshold
Value
Secondary Parame‐
ters with Enable
Conditions
Monitoring
Time
Length
MIL Il‐
lum.
Component Diag‐
nostic Procedure
• Or
• Pressure up‐
stream throttle
not active
• And
• Choice of:
• Barometric pres‐
sure > 73.00; <
107.50 kPa
• Or
• Barometric pres‐
sure sensor not
active
GTI 2014 ➤
Generic Scan Tool - Edition 04.2015
186
Rep. Gr. ST - Generic Scan Tool
DTC /
Descrip‐
tion
Monitor
Strategy
Descrip‐
tion
Malfunction Crite‐
ria and Threshold
Value
Secondary Parame‐
ters with Enable
Conditions
Monitoring
Time
Length
MIL Il‐
lum.
Component Diag‐
nostic Procedure
• Deviation throt‐
tle area control‐
ler > 35.0 %
• Filtered lamb‐
da controller
correction
-50.0 – 50.0 %
• Lambda con‐
trol active
• Throttle position
> 4.50° TPS
• Engine speed >
1,216; < 6.000
RPM
• Modeled pres‐
sure quotient >
0.63; < 0.90 [-]
• 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
• And
• Choice of:
• MAF sensor ac‐
tive
• Or
• Manifold pres‐
sure sensor ac‐
tive
• And
• Choice of:
• Pressure up‐
stream throttle <
135.0 kPa
• Or
• Pressure up‐
stream throttle
not active
GTI 2014 ➤
Generic Scan Tool - Edition 04.2015
3. Diagnosis and Testing
187
DTC /
Descrip‐
tion
Monitor
Strategy
Descrip‐
tion
Malfunction Crite‐
ria and Threshold
Value
Secondary Parame‐
ters with Enable
Conditions
Monitoring
Time
Length
MIL Il‐
lum.
Component Diag‐
nostic Procedure
• And
• Choice of:
• Barometric pres‐
sure > 73.00; <
107.50 kPa
• Or
• Barometric pres‐
sure sensor not
active
P2294
Fuel
Pres‐
sure
Regula‐
tor 1
Control
Circuit/
Open
Fuel Con‐
trol Valve
Open Cir‐
cuit
• Voltage high
side < 1.87 –
2.26 V
• Voltage low
side > 2.78 –
3.33 V
• Engine speed > 0
RPM
• Or
• Fuel cut off active
• Actuator com‐
manded off
• 0.8 s
• Contin‐
uous
• 2
DCY
– Check the Fuel
Pressure Regu‐
lator Valve -
N276- . Refer to
.
• Low and high
side off:
• Voltage low
side > 2.78 –
3.33 V
• Voltage high
side < 1.87 –
2.26 V
• Low and high
side on:
• Current low
side < 12.2 –
15.0 A
• Current high
side < 13.5 –
16.5 A
• Engine speed >
600 RPM
• And
• Fuel cut off not
active
• Actuator com‐
manded on
P2295
Fuel
Pres‐
sure
Regula‐
tor 2
Control
Circuit
Low
Fuel Con‐
trol Valve
Short To
Ground
High Side
• Current high
side (hardware
values) > 13.4
– 17.0 A
• Ignition on
• Or
• Ignition off (dur‐
ing ECM keep
alive-time)
• And
• Actuator com‐
manded on
• 0.8 s
• Contin‐
uous
• 2
DCY
– Check the Fuel
Pressure Regu‐
lator Valve -
N276- . Refer to
.
GTI 2014 ➤
Generic Scan Tool - Edition 04.2015
188
Rep. Gr. ST - Generic Scan Tool
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