Volkswagen Golf / Golf GTI / Jetta. Manual — part 145

01-159

Work step 7: Oxygen Sensor
(O2S) aging diagnosis of Oxygen
Sensor (O2S) before Three Way
Catalytic Converter (TWC)

Rapid data transfer

HELP

Select function XX

Indicated on display:

- Press buttons -0- and -4- for

function "Initiate basic setting"
and confirm entry with -Q- button.

Basic setting

Input display group number XXX

Indicated on display:

- Press buttons -0-, -3- and -4- for

"Display group number 34" and
confirm entry with -Q- button.

System in basic setting 34

1

2

3

4

Indicated on display: (1...4

display

zones)

- Depress brake pedal and hold.

- Depress accelerator down to wide

open throttle position.

Engine speed will be increased by

Motronic Engine Control Module
(ECM) -J220- to approx. 2300
rpm.

- Depress brake pedal and

accelerator down until display in
display zone 4 jumps from "Test
OFF" to "Test ON". When
performing this test Three Way
Catalytic Converter (TWC)
temperature in display zone 2
must be at least 380 C.

Readiness code

01-160

Note:

This process can take approx. 90 seconds.

- Depress brake pedal and accelerator down until

display zone 4 displays specification "B1-P1
OK.".

- Release brake and accelerator pedals.

If "B1 P1 n.OK." appears in display zone 4:

- Press

button.

- Check DTC memory, repair Diagnostic Trouble

Codes (DTCs) if necessary and then erase DTC
memory

Page 01-23

, DTC memory, checking

and erasing.

- Read readiness code

Page 01-146

. If the

DTC memory has been erased or the Motronic
Engine Control Module (ECM) -J220- was
disconnected from battery (B+) positive, the
readiness code must be generated again

Page 01-149

.

If no DTC is stored:

- Check aging of Oxygen Sensor (O2S) before

Three Way Catalytic Converter (TWC)

Page

24-150

.

If "B1 P1 OK." appears in display zone 4:

- Press C button.

Readiness code

01-161

Work step 8: Fuel supply system
diagnosis (part load)

Basic setting

Input display group number XXX

Indicated on display:

- Press buttons -2-, -1- and -6- for

"Display group number 216" and
confirm entry with -Q- button.

System in basic setting 216

1

2

3

4

Indicated on display: (1 to 4

display zones)

If the display does not indicate as
described:

- Depress brake pedal and hold.

- Depress accelerator down to wide

open throttle position.

Engine speed will be increased by

Motronic Engine Control Module
(ECM) -J220- to approx. 2300
rpm.

- Depress brake pedal and

accelerator down until display
zone 4 displays (after approx. 75
seconds) specification
"xxxxx100".

- Release brake and accelerator

pedals.

- Press

button.

Readiness code

01-162

- Check DTC memory, repair Diagnostic Trouble

Codes (DTCs) if necessary and then erase DTC
memory

Page 01-23

, DTC memory, checking

and erasing.

- Read readiness code

Page 01-146

. If the

DTC memory has been erased or the Motronic
Engine Control Module (ECM) -J220- was
disconnected from battery (B+) positive, the
readiness code must be generated again

Page 01-149

.

If the display indicates as described:

- Press

button.

Work step 9: Oxygen Sensor (O2S) control
diagnosis status after Three Way Catalytic
Converter (TWC)

Rapid data transfer

HELP

Select function XX

Indicated on display:

- Press buttons -0- and -8- for function "Read

measured value (data) block" and confirm entry
with -Q- button.

Read measured value block

Input display group number XXX

Indicated on display:

- Press buttons -0-, -3- and -0- for "Display group

number 30" and confirm entry with -Q- button.

Read measured value block 30

1

2

Indicated on display: (1...2

display zones)

Readiness code