Content .. 153 154 155 156 ..

Volkswagen Golf / Golf GTI / Golf Variant. Service manual - part 155

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

• O2S front 0.90 –

1.10 [-]

• or
• Fuel cut off not

calibrated

• Case 1:
• Integrated MAF

@ canister purge

per driving cycle

>= n.a. g

• Case 2:
• ratio MAF @ can‐

ister purge and

MAF per cylinder

>= 0.00 [-]

• Or
• Canister purge

sampling rate >=

20.00 %

• And
• Integrated air

mass @ canister

purge valve >=

31.9 g

• Depending on

AAT:

• AAT >= 30° C
• Canister load <=

0.20 [-]

• Or
• AAT >= 50; < 30°

• Canister load <=

0.20 [-]

• Or
• AAT < 50° C
• Canister load <=

0.20 [-]

P0444

EVAP

System

Purge

Control

Valve

"A" Cir‐

cuit

Open

EVAP

Purge

Valve

Open Cir‐

cuit

• Output voltage,

lower range >=

1.92 – 2.21 V

• Output voltage,

upper range

(hardware val‐

ues) <= 2.85 –

3.25 V

• Engine start not

active

• Engine running
• Evap purge valve

opening signal

(PWM) > 3.13; <=

98.83 %

• Actuator com‐

manded off

• 2.0 s
• Con‐

tinu‐

ous

• 2

DCY

– Check the EVAP

Canister Purge

Regulator Valve

1 - N80- . Refer

GTI 2014 ➤

Generic Scan Tool - Edition 04.2015

3. Diagnosis and Testing

293

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

P0445

EVAP

System

Purge

Control

Valve

"A" Cir‐

cuit

Shorted

EVAP

Purge

Valve

Short To

Ground

• Output voltage

(hardware val‐

ues) 1.92 –

2.21 V

• Engine start not

active

• Engine running
• Evap purge valve

opening signal

(PWM) <= 98.83

• Actuator com‐

manded off

• 2.0 s
• Con‐

tinu‐

ous

• 2

DCY

– Check the EVAP

Canister Purge

Regulator Valve

1 - N80- . Refer

EVAP

Purge

Valve

Short To

Battery

Plus

• Actuator tem‐

perature 160 –

200° C

• Or
• Output current

(hardware val‐

ues) driver

stage internal

value

• Engine start not

active

• Engine running
• Evap purge valve

opening signal

(PWM) >= 3.13 %

• Actuator com‐

manded on

P0450

EVAP

System

Pres‐

sure

Sensor/

Switch

Circuit

NVLD

Switch

Open Cir‐

cuit

• Signal voltage

0.39 – 0.55 V

• Case 1:
• Engine running
• Case 2:
• Ignition off
• NVLD (EVAP-

System) diagnos‐

tic mode active

• 0.5 s
• Con‐

tinu‐

ous

• 2

DCY

– Check the Fuel

Tank Leak De‐

tection Control

Module - J909- /

Fuel Tank Pres‐

sure Sensor -

G400- . Refer to

P0451

EVAP

System

Pres‐

sure

Sensor/

Switch

Circuit

Range/

Per‐

for‐

mance

NVLD

Switch

Function‐

al Check

Stuck

• Natural vac‐

uum leak de‐

tection (NVLD)

switch position

closed

• Ignition off
• Fuel level < 85.10

• Fuel temperature

increase >= 5 K

• For time >= 1.0 h
• AAT >= 4° C
• Barometric pres‐

sure >= 73.0 kPa

• Time since igni‐

tion off > 20; <

1,440 min

• 0.1 s
• Once /

DCY

• 2

DCY

– Check the Fuel

Tank Leak De‐

tection Control

Module - J909- /

Fuel Tank Pres‐

sure Sensor -

G400- . Refer to

GTI 2014 ➤

Generic Scan Tool - Edition 04.2015

294

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

Monitor‐

ing Time

Length

MIL Il‐

lum.

Component Diag‐

nostic Procedure

P0452

EVAP

System

Pres‐

sure

Sensor/

Switch

Circuit

Low

NVLD

Switch

Short To

Ground

• Signal voltage

< 0.24 V

• Case 1:
• Engine running
• Case 2:
• Ignition off
• NVLD (EVAP-

System) diagnos‐

tic mode active

• 0.5 s
• Con‐

tinu‐

ous

• 2

DCY

– Check the Fuel

Tank Leak De‐

tection Control

Module - J909- /

Fuel Tank Pres‐

sure Sensor -

G400- . Refer to

P0453

EVAP

System

Pres‐

sure

Sensor/

Switch

Circuit

High

NVLD

Switch

Short To

Battery

Plus

• Signal voltage

> 3.0 V

• Case 1:
• Engine running
• Case 2:
• Ignition off
• NVLD (EVAP-

System) diagnos‐

tic mode active

• 0.5 s
• Con‐

tinu‐

ous

• 2

DCY

– Check the Fuel

Tank Leak De‐

tection Control

Module - J909- /

Fuel Tank Pres‐

sure Sensor -

G400- . Refer to

P0456

EVAP

System

Leak

Detec‐

ted

(Very

Small

Leak)

EVAP

System

Small

Leak

Function‐

al Check

• Natural vac‐

uum leak de‐

tection (NVLD)

switch position

= open

• Ignition off
• Fuel level < 85.10

• Fuel temperature

drop >= 6 K

• For time > 1 h
• AAT >= 4° C
• Barometric pres‐

sure > 73.00 kPa

• Diff. barometric

pressure @ stop

and barometric

pressure @ start

< 0.65 kPa

• Time since igni‐

tion off > 90

[min] ; < 600 min

• 0.1 s
• Once /

DCY

• 2

DCY

– Check the EVAP

System visually

for any leaking

hoses or dam‐

age to compo‐

nents.

– Check the EVAP

Canister Purge

Regulator Valve

1 - N80- . Refer

– Check the Fuel

Tank Leak De‐

tection Control

Module - J909- /

Fuel Tank Pres‐

sure Sensor -

G400- . Refer to

GTI 2014 ➤

Generic Scan Tool - Edition 04.2015

3. Diagnosis and Testing

295

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

P0461

Fuel

Level

Sensor

"A" Cir‐

cuit

Range/

Per‐

for‐

mance

Fuel Lev‐

el Plausi‐

bility

Check

• Diff. fuel con‐

sumption And

Fuel level

changes <

-25.0; > 12.0 [-]

• General:
• Refueling or de‐

fueling not detec‐

ted

• And
• Case 1:
• For tank full fuel

level > 96.09 %

• Fuel consump‐

tion since last re‐

fueling or last

plausibility check

> 44.0 [-]

• Case 2:
• For tank not full

fuel level <=

96.09 %

• Fuel consump‐

tion since last re‐

fueling or last

plausibility check

> 15.0 l

• 1.0 s
• Multi‐

ple

• 2

DCY

• Check the Fuel

Level Sensor -

G- . Refer to ap‐

propriate repair

manual.

P0462

Fuel

Level

Sensor

"A" Cir‐

cuit Low

CAN:

Fuel Lev‐

el Sensor

1 CAN

Commu‐

nication

With In‐

strument

Cluster

Module

• Instrument

cluster module

signal: short to

ground failure

• 0.5 s
• Con‐

tinu‐

ous

• 2

DCY

• Check the Fuel

Level Sensor -

G- . Refer to ap‐

propriate repair

manual.

• Instrument

cluster module

signal: signal

range check

failure

P0463

Fuel

Level

Sensor

"A" Cir‐

cuit High

CAN:

Fuel Lev‐

el Sensor

1 CAN

Commu‐

nication

With In‐

strument

Cluster

Module

• Instrument

cluster module

signal: short to

battery / open

circuit failure

• 0.5 s
• Con‐

tinu‐

ous

• 2

DCY

• Check the Fuel

Level Sensor -

G- . Refer to ap‐

propriate repair

manual.

GTI 2014 ➤

Generic Scan Tool - Edition 04.2015

296

Rep. Gr. ST - Generic Scan Tool

Content .. 153 154 155 156 ..