Volkswagen Golf / Golf GTI / Jetta. Manual — part 94

26-17

Coolant temperature must be at least 85

C,

display group 1, display zone 2.

Catalytic converter temperature must be

at least 380 C,

display group 46,

display zone 2.

No DTCs may be stored in DTC

memory:

Repair Manual, 2.8 Liter VR6 4V Fuel

Injection & Ignition, Engine Code(s): BDF,
Repair Group 01

Oxygen sensor aging before catalytic

converter is OK, checking:

Repair Manual, 2.8 Liter VR6 4V Fuel

Injection & Ignition, Engine Code(s): BDF,
Repair Group 24

Oxygen sensor aging after catalytic

converter is OK, checking:

Repair Manual, 2.8 Liter VR6 4V Fuel

Injection & Ignition, Engine Code(s): BDF,
Repair Group 24

Note:

The diagnosis will only be ended if the

oxygen sensor aging diagnosis before and
after catalytic converter is completed
successfully first.

Exhaust system components, servicing

26-18

Test sequence

- Connect V.A.G 1551 (or V.A.G 1552). Start

engine and select "Address word" 01 of engine
control module.

Repair Manual, 2.8 Liter VR6 4V Fuel Injection

& Ignition, Engine Code(s): BDF, Repair Group
01

Rapid data transfer

HELP

Select function XX

Indicated on display

- Press keys 0 and 4 for function "Initiate basic

setting" and confirm entry with Q key.

Basic setting

Input display group number XXX

Indicated on display

- Press keys 0, 0 and 1 for "Display group number

1" and confirm entry with Q key.

System in basic setting 1

1

2

3

4

Indicated on display: (1...4

display zones)

Only continue with the test when:

Coolant temperature is above 85 C -Display

zone 2-

Exhaust system components, servicing

26-19

- Change to display group 46 as

follows:

- Press C key.

Basic setting

Input display group number XXX

Indicated on display

- Press keys 0, 4 and 6 for "Display

group number 46" and confirm
entry with Q key.

System in basic setting 46

1

2

3

4

Indicated on display: (1...4

display

zones)

Only continue with the test when:

Note:

This process can take approx. 80
seconds.

- Depress brake pedal and hold.

- Depress accelerator down to wide

open throttle position.

Engine speed will be increased by

engine control module to approx.
2300 rpm.

Catalytic converter temperature

is above 380 C -Display zone
2-

- Hold brake pedal and accelerator

down until display in display zone
4 jumps from "Test OFF" to "Test
ON".

- Continue to hold brake pedal and

accelerator down until display
zone 4 displays specification "Cat.
B1 OK.".

Exhaust system components, servicing

26-20

- Release brake and accelerator pedals.

"Cat B1 OK." appears in display zone 4:

- Press

key.

- Press keys 0 and 6 for function "End output" and

confirm entry with Q key.

- Switch ignition off.

"CatB1 n.OK." appears in display zone 4:

- Press

key.

- Check DTC memory:

Repair Manual, 2.8 Liter VR6 4V Fuel Injection

& Ignition, Engine Code(s): BDF, Repair Group
01

- Read readiness code:

Repair Manual, 2.8 Liter VR6 4V Fuel Injection

& Ignition, Engine Code(s): BDF, Repair Group
01

Exhaust system components, servicing