Volkswagen Golf / Golf GTI / Jetta. Manual — part 156

01-166

System in basic setting 36

1

2

Indicated on display: (1...2

display

zones)

If the diagnosis is initiated by the
Motronic Engine Control Module
(ECM) -J220- the display in display
zone 2 jumps from "Test OFF" to
"Test ON".

Note:

This process can take approx. 30
seconds.

If "B1 P2 n.OK." appears in display
zone 4:

- Leave engine running at idle until

display zone 2 shows
specification "B1 P2 OK.".

- 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

.

Readiness code

01-167

If no DTC is stored:

- Check Oxygen Sensor (O2S) and Oxygen

Sensor (O2S) control after Three Way Catalytic
Converter (TWC)

Page 24-140

If "B1 P2 OK." appears in display zone 4:

- Press -C- button.

Work step 12: Three Way Catalytic Converter
(TWC) diagnosis (checking conversion)

Note:

The diagnosis will only be ended if the Oxygen
Sensor (O2S) aging diagnosis for Oxygen
Sensor (O2S)s before and after Three Way
Catalytic Converter (TWC) is first successfully
completed.

Basic setting

Input display group number XXX

Indicated on display:

- Press buttons -0-, -4- and -6- for "Display group

number 46" and confirm entry with -Q- button.

System in basic setting 46

1

2

3

4

Indicated on display: (1 to 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.

Readiness code

01-168

Only continue with the test when:

The Three Way Catalytic Converter (TWC)

temperature is above 380 C (display zone
2).

- Depress brake pedal and accelerator down and

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

Note:

This process can take approx. 80 seconds.

- Depress and hold brake pedal and accelerator

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

- Release brake and accelerator pedals.

If "CatB1 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.

Readiness code

01-169

- 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:

- Press buttons -0- and -6- for the function "End

output" and confirm entry with the -Q- button.

- Switch off ignition.

- Replace front exhaust pipe with Three Way

Catalytic Converter (TWC):

Repair Manual, 2.8 Liter VR6 4V Engine

Mechanical, Engine Code(s): BDF; Repair Group
26

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

- Press -C- button.

Work step 13: Fuel supply system diagnosis
(idle speed)

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.

Readiness code