Content .. 112 113 114 115 ..

Volkswagen Golf / Golf GTI / Golf Variant. Manual - part 114

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

P0491

AIR Sys‐

tem In‐

suffi‐

cient

Flow

Bank 1

Secon‐

dary Air

System

Function‐

al Check

• Case 1:
• Blockage: ratio

relative meas‐

ured secon‐

dary air pres‐

sure and mod‐

elled secon‐

dary air pres‐

sure [tube

blocked] < 0.70

[-]

• Or
• Leakage: ratio

relative meas‐

ured secon‐

dary air pres‐

sure and mod‐

elled secon‐

dary air pres‐

sure [leak diag‐

nosis] < 0.60 [-]

• Case 2:
• Diff. expected

integrated sec‐

ondary air

pressure pul‐

sations and ac‐

tual integrated

secondary air

pressure pul‐

sations n.a.

kPa

• Case 3:
• Blockage: ratio

relative meas‐

ured secon‐

dary air pres‐

sure and mod‐

elled secon‐

dary air pres‐

sure [tube

blocked] < 0.15

[-]

• Or
• Leakage: ratio

relative meas‐

ured secon‐

dary air pres‐

sure and mod‐

elled secon‐

dary air pres‐

sure [leak diag‐

nosis] < 0.15 [-]

• General:
• Secondary air

pump active

• Catalyst heating

active

• Secondary air in‐

jection active

• MAF <= 140.0 kg/

• ECT @ cylinder

head >= -10; <

115° C

• IAT @ manifold

>= -10; < 100° C

• Modelled catalyst

temperature <

700° C

• Relative baro‐

metric pressure >

0.73 [-]

• Diff. barometric

pressure vs.

manifold pres‐

sure > n.a. kPa

• 0.1 s
• Once /

DCY

• 2

DCY

– Check the Sec‐

ondary Air Com‐

bination Valve

visually.

– Check visually

for Blockage in

system tubing.

P0501

Vehicle

Speed

Sensor

"A" Cir‐

CAN: Ve‐

hicle

Speed

Sensor

CAN

• Speed sensor

fault value: Out

of range high

failure

• 1.3 s
• Contin‐

uous

• 2

DCY

– Check the CAN-

Bus circuits. If

there are any

other DTC’s

GTI 2014 ➤

Generic Scan Tool - Edition 04.2015

3. Diagnosis and Testing

129

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

cuit

Range/

Per‐

for‐

mance

Commu‐

nication

With Ve‐

hicle

Speed

Sensor

• Speed sensor

fault value: Out

of range low

failure

present check

them first.

– Refer to the

proper wiring

schematic for

terminal and

component lo‐

cation.

• Speed sensor

fault value: Ra‐

tionality check

high failure

• Speed sensor

fault value: Ra‐

tionality check

low failure

P0502

Vehicle

Speed

Sensor

"A" Cir‐

cuit Low

Vehicle

Speed

Sensor

Electrical

Check

• Vehicle speed

sensor signal:

electrical error

failure

• 1.3 s
• Contin‐

uous

• 2

DCY

– Check the CAN-

Bus circuits. If

there are any

other DTC’s

present check

them first.

– Refer to the

proper wiring

schematic for

terminal and

component lo‐

cation.

P0506

Idle

Control

System

RPM -

Lower

Than

Expec‐

ted

Idle Con‐

troller

Function

Monitor‐

ing: Out

Of Range

Low

• Negative en‐

gine speed de‐

viation from set

point > 100

RPM

• Integrated I-

part of idle

speed control‐

ler n.a.

• Gear switch not

active

• Vehicle speed = 0

mph

• For time >= 0.0 s
• Driver request

not active

• Throttle actuator

commanded on

• Evap purge flow <

4.0 kg/h

• Torque safety

limitation not ac‐

tive

• Clutch switch n.a.
• Barometric pres‐

sure > 69.99 kPa

• Catalyst heating

not active

• ECT @ cylinder

head > -48° C

• Time after engine

start > 0.0 s

• Set point change

n.a.

• For time n.a.

• 12.0 s
• Contin‐

uous

• 2

DCY

– Check the Throt‐

tle Valve Control

Module - GX3- .

Refer to

GTI 2014 ➤

Generic Scan Tool - Edition 04.2015

130

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

P0507

Idle

Control

System

RPM -

Higher

Than

Expec‐

ted

Idle Con‐

troller

Function

Monitor‐

ing: Out

Of Range

High

• Positive engine

speed devia‐

tion from set

point > 90 RPM

• Integrated I-

part of idle

speed control‐

ler n.a.

• Gear switch not

active

• Vehicle speed = 0

mph

• For time >= 0.0 s
• Driver request

not active

• Throttle actuator

commanded on

• Evap purge flow <

4.0 kg/h

• Torque safety

limitation not ac‐

tive

• Clutch switch n.a.
• Barometric pres‐

sure > 69.99 kPa

• Catalyst heating

not active

• ECT @ cylinder

head > -48° C

• Time after engine

start > 0.0 s

• Set point change

n.a.

• For time n.a.

• 12 s
• Contin‐

uous

• 2

DCY

– Check the Throt‐

tle Valve Control

Module - GX3- .

Refer to

GTI 2014 ➤

Generic Scan Tool - Edition 04.2015

3. Diagnosis and Testing

131

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

P050A

Cold

Start

Idle

Control

System

Per‐

for‐

mance

Cold Idle

Controller

Function

Monitor‐

ing: Out

Of Range

High

• Positive engine

speed devia‐

tion from set

point > 90 RPM

• Integrated I-

part of idle

speed control‐

ler n.a.

• Gear switch not

active

• Vehicle speed = 0

mph

• For time >= 0.0 s
• Driver request

not active

• Throttle actuator

commanded on

• Evap purge flow <

4.0 kg/h

• Torque safety

limitation not ac‐

tive

• Clutch switch n.a.
• Barometric pres‐

sure > 69.99 kPa

• Catalyst heating

not active

• ECT @ cylinder

head > -48° C

• Time after engine

start > 0.0 s

• Set point change

n.a.

• For time n.a.

• 12 s
• Contin‐

uous

• 2

DCY

– Check the Throt‐

tle Valve Control

Module - GX3- .

Refer to

GTI 2014 ➤

Generic Scan Tool - Edition 04.2015

132

Rep. Gr. ST - Generic Scan Tool

Content .. 112 113 114 115 ..