Volkswagen Golf / Golf GTI / Jetta. Manual — part 161

01-186

Read measured value block 1

1

2

3

4

Indicated on display: (1...4

display

zones)

Note:

To change to another display group
proceed as follows:

Display
group

VAG

1551

VAG 1552

Higher

Press

button -3-

-Press

button

Lower

Press

button -1-

Press

button

Skip

Press

button -

C-

Press

button -C-

- If the specifications in all display

zones are obtained,

- press

button.

Rapid data transfer

HELP

Select function XX

Indicated on display:

Note:

Measured value blocks which are
not described in this chapter are
currently only intended for research
and development and production.
The values displayed are not
relevant for service department
troubleshooting.

- Press buttons -0- and -6- for the

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

Measured value (data) blocks

01-187

Measured value blocks, display groups 0...9 - Basic functions, evaluating

Display group 1 - Basic functions

Engine running at idle

Read measured
value block 1

Indicated on

display

xxxx
rpm

xxx.x

C

xx.x

%

xxxxxxxx

1

2

3

4

Display zones

Specification Evaluation

Prerequisites for
basic settings

11111111

Page 01-

189

Oxygen Sensor (O2S) control
before Three Way Catalytic
Converter (TWC)

-10.0...10.0 %

Page 01-

224

Coolant temperature

80.0...110.0

C

Page 01-

195

Engine speed (idle speed)

640...720 rpm

Page 01-

188

Measured value (data) blocks

01-188

Evaluating display group 1, display zone 1 - Engine speed (idle speed)

VAG 1551

display

Possible cause

Corrective action

Less than

specified

Throttle Valve Control Module -

J338- sticking/faulty

- Check Throttle Valve
Control Module -J338-

Page 24-59

Large amount of unmetered air

(cannot be compensated for by the
idling stabilization)

- Check intake air system for
leaks

Page 24-121

- Perform idle speed check

Page 24-125

Greater than

specified

Idle speed not detected

- Check DTC memory

Page 01-23

, DTC memory,

checking and erasing

Large amount of unmetered air

(cannot be compensated for by the
idling stabilization)

- Check intake air system for
leaks

Page 24-121

Throttle Valve Control Module -

J338- sticking/faulty

- Check Throttle Valve
Control Module -J338-

Page 24-59

- Perform idle speed check

Page 24-125

Supply voltage too low, engine tries

to reduce charge difference through
increased idle speed

- Evaluation

Page 01-

194

, display group 4, display

zone 2

Measured value (data) blocks

01-189

Significance of figures in 8 digit number block, display zone 4 - Adjustment
conditions

Significance if display = 1

1 2 3 4 5 6 7 8

Significance

1 Coolant temperature above 80 C

1

Speed below 2000 rpm

1

Throttle valve closed

1

Oxygen Sensor (O2S) control active

1

Idle speed detected

1

Air conditioner compressor switched off

1

Coolant temperature above 380 C

1

No Diagnostic Trouble Codes (DTCs) detected by On
Board Diagnostic (OBD)

Measured value (data) blocks