Volkswagen Golf / Golf GTI / Jetta. Manual — part 158

01-174

- Leave engine running at idle until display zone 4

displays:

Specification: "Syst. OK."

If "Syst.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:

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

output" and confirm entry with -Q- button.

- Switch off ignition.

- Check combi-valve:

Repair Manual, 2.8 Liter VR6 4V Engine

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

Readiness code

01-175

If "Syst. OK." appears in display zone 4:

- Press

button.

Work step 16: Read readiness code

- Read readiness code

Page 01-146

.

Readiness code

01-176

Readiness code, generating (overview)

Work steps 1 to 5:

Work step/

Diagnosis

Function/group

Test

prerequisites

Display

zone 1

Display

zone 2

Display

zone 3

1 Check DTC

memory

02/---

Ignition on

---

---

---

2 Erase DTC

memory

05/---

Ignition on

---

---

---

3

Adapting

Throttle

Valve

Control

Module

04/60

Ignition on

Throt.

valve

angle

angle

sensor 1

Throt.

valve

angle

angle

sensor 2

Learning

step

counter

Specification: 3...93 %

97...3 %

8

4 Requesting

temperature

08/4

Idle speed

Idle

speed

Voltage

supply for

Motronic

Engine

Control
Module

(ECM) -

J220-

Coolant

temperature

Specification: 640...720

rpm

11.5...15.0

V

85.0...110.0

C

5

Leak

diagnosis

04/071

Idle speed

Reed

condition

Text

Text

Specification:

Reed

open

---

Check END

Readiness code

01-177

Work steps 6 to 9:

Work step/

Diagnosis

Function/group

Test

prerequisites

Display

zone 1

Display

zone 2

Display

zone 3

6 Oxygen

Sensor

(O2S)

control
status

08/30

Idle speed

Before

Three

Way

Catalytic

Converter

(TWC)

After Three

Way

Catalytic

Converter

(TWC)

No display

Specification:

111

xxx

---

7 Oxygen

Sensor

(O2S)

before

Three

Way

Catalytic

Converter

(TWC)

(Oxygen

Sensor

(O2S)

aging)

04/34

Brakes

operated

Accelerator

in wide
openthrottle
position.

Engine

speed

Three Way

Catalytic

Converter

(TWC)

temperature

Dynamic

factor of

Oxygen

Sensor

(O2S)

before

Three Way

Catalytic

Converter

(TWC)

Specification:

Approx.

2300

rpm

Greater than

380 C

1.00...2.50

8

Fuel

supply

system

(part

load)

04/216

Brakes

operated

Accelerator

in wide
openthrottle
position.

Engine

speed

Oxygen

Sensor

(O2S)

before

Three Way

Catalytic

Converter

(TWC)

lower part

load

Oxygen

Sensor

(O2S)

before

Three Way

Catalytic

Converter

(TWC)

idle speed

Specification:

---

---

---

Readiness code