Volkswagen Golf / Golf GTI / Golf Variant. Manual - part 126

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

P2251

O2 Sen‐

sor Neg‐

ative

Current

Control

Circuit/

Open

Bank 1

Sensor

1

Oxygen

Sensors

Front

Open Cir‐

cuit Virtu‐

al Ground

(VG)

• Nernst voltage

(VN) > 4.40 V

• Or
• Diff. pump volt‐

age (VIP) vs.

virtual ground

voltage (VG) >

2.35 V

• Ddiff. pump

voltage (VIP)

vs. virtual

ground voltage

(VG) < -2.35 V

• Or
• Diff. nernst

voltage (VN)

vs. virtual

ground voltage

(VG) > 1.60 V

• Diff. nernst

voltage (VN)

vs. virtual

ground voltage

(VG) < -0.10 V

• Or
• Pump current >

0.0115 A

• Or
• Measurement

WRAF sensor

label resistor >

n.a. Ohm

• And
• Choice of:
• Diff. pump volt‐

age (VIP) vs.

virtual ground

voltage (VG)

<= 1.20 V

• Diff. nernst

voltage (VN)

vs. virtual

ground voltage

(VG) <= 1.20 V

• O2S front (linear)

ready

• Measurement of

WRAF sensor la‐

bel resistor finish‐

ed

• Pump current

controller active

• 2.3 s
• Contin‐

uous

• 2

DCY

– Check the Oxy‐

gen Sensor 1

Before Catalytic

Converter -

GX10- . Refer to

⇒ “3.6.28  Oxy‐

gen Sensor 1

Before Catalytic

Converter

GX10 , Check‐

ing”, page 516

 .

GTI 2014 ➤

Generic Scan Tool - Edition 04.2015

3. Diagnosis and Testing    

177

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

P2257

AIR Sys‐

tem

Control

"A" Cir‐

cuit Low

Secon‐

dary Air

Injection

Pump

Relay

Short To

Ground

• Output voltage

(hardware val‐

ues) 1.92 –

2.21 V

• Engine running
• Actuator com‐

manded off

• 1.0 s
• Contin‐

uous

• 2

DCY

– Check the Sec‐

ondary Air Injec‐

tion Pump Motor

- V101- / Secon‐

dary Air Injection

Pump Relay -

J299- . Refer to

⇒ “3.6.29  Sec‐

ondary Air Injec‐

tion Pump Motor

V101 / Secon‐

dary Air Injection

Pump Relay

J299 , Check‐

ing”, page 519

 .

P2258

AIR Sys‐

tem

Control

"A" Cir‐

cuit High

Secon‐

dary Air

Injection

Pump

Relay

Short To

Battery

Plus

• Actuator tem‐

perature > 160

– 200° C

• Or
• Output current

(hardware val‐

ues) > 1.0 – 2.0

A

• Engine running
• Actuator com‐

manded on

• 1.0 s
• Contin‐

uous

• 2

DCY

– Check the Sec‐

ondary Air Injec‐

tion Pump Motor

- V101- / Secon‐

dary Air Injection

Pump Relay -

J299- . Refer to

⇒ “3.6.29  Sec‐

ondary Air Injec‐

tion Pump Motor

V101 / Secon‐

dary Air Injection

Pump Relay

J299 , Check‐

ing”, page 519

 .

GTI 2014 ➤

Generic Scan Tool - Edition 04.2015

178

     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

P2270

O2 Sen‐

sor Sig‐

nal

Biased/

Stuck

Lean

Bank 1

Sensor

2

Oxygen

Sensors

Rear Sig‐

nal

Range

Check

• Max. O2S rear

voltage < 0.87

V

• General condi‐

tions:

• Close the gap

stimulation re‐

quest active

• Vehicle speed >=

6 mph

• Catalyst over‐

heating protec‐

tion not active

• Turbine over‐

heating protec‐

tion not active

• O2S rear ready
• O2S front ready
• ECT @ cylinder

head > 60° C

• Modeled catalyst

temperature 470

– 780° C

• Difference be‐

tween dynamic

and stationary

catalyst tempera‐

ture -306 – 304° C

• Modeled catalyst

temperature once

after engine start

> 550° C

• Integrated MAF,

catalyst temp.

conditions fulfil‐

led >= 0.0 g

• Modeled EGT @

O2S rear <= 900°

C

• MAF per cylinder

30.0 – 200.0 kg/h

• MAF per cylinder

per stroke, lower

range >= 89.99

mg/rev

• MAF per cylinder

per stroke, upper

range <= 750.0

mg/rev

• And
• Low dynamic

conditions devia‐

tion actual

• And

• 60.0 –

70.0 s

• Once /

DCY

• 2

DCY

– Check the Oxy‐

gen Sensor 1 Af‐

ter Catalytic

Converter -

GX7- . Refer to

⇒ “3.6.27  Oxy‐

gen Sensor 1 Af‐

ter Catalytic

Converter GX7 ,

Checking”, page

513

 .

GTI 2014 ➤

Generic Scan Tool - Edition 04.2015

3. Diagnosis and Testing    

179

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

• Target engine

speed < 150 RPM

• Dynamic MAF <

15.01 mg/rev

• Dynamic lambda

controller output

<= 20.0 %

• And
• Integrated MAF

after dynamic

conditions are ful‐

filled > 20.0 g

• Time after a cata‐

lyst purge phase

>= 1.0 s

• O2S rear voltage

@ diagnosis start

>= 0.55 V

• Integrated MAF

to start diagnosis

>= 5.0 g

• Integrated heat

energy >= 800.0

– 2,000.0 kJ

• Engine speed

1,248 – 3,008

RPM

• Coasting function

n.a

• O2S heater rear

active

• Lambda adapta‐

tion not active

• Valve lift n.a.
• And
• Depending on

lambda control:

• Intervention of

trim control be‐

havior activation

of catalyst diag‐

nosis < 0.10 [-]

• Or
• Intervention of

trim control dur‐

ing active catalyst

diagnosis < 0.20

[-]

• Depending on

canister purge:

GTI 2014 ➤

Generic Scan Tool - Edition 04.2015

180

     Rep. Gr. ST - Generic Scan Tool