Volkswagen Workshop Service and Repair Manuals

Display group 000 (decimal displayed value)

▪ Engine running at idling speed, control unit in "basic setting"

Display zones

Specification

Corresponds to

1

2

3

4

5

6

7

8

9

10

Part load adaption value for Lambda control before catalyst

118...138

-7...7 %

Idling adaption value for Lambda control before catalyst

241...255 or
0...14

-10...10 %

Lambda control

96...160

-5...5 %

Idling air mass adaption value

112...144

-5...5 kg/h

Idling control (idling air mass)

112...144

-5...5 kg/h

Throttle valve angle

0...23

0...10 <°

Battery voltage

176...212

12.0...14.0 V

Engine speed

80...88

800...880 rpm

Engine load

28...58

1.4...2.4 ms

Coolant temperature

170...204

80...108 °C

Display zone: 1

Possible fault cause

Fault elimination

More than 204

- Coolant temperature sender

- Check coolant temperature sender => Page 24-91

Less than 170

- Coolant temperature sender
- Thermostat defective (open)

- Check thermostat => Repair group 19

Display zone: 2

Possible fault cause

Fault elimination

More than 58

- Consumer switched on
- Lambda control on limit

- Switch off consumer
Check Lambda probe and Lambda control before catalyst => Page 24-58

Less than 28

- Unmetered air
- Fuel pressure regulator defective/hose fallen off

- Check intake air system for leaks => Page 24-121

Display zone: 3

Possible fault cause

Fault elimination

Less than 80

- Driving range selected
- Throttle valve control part defective

- Selector lever in P or N position
Check throttle valve control part => Page 24-71

More than 88

- Idling switch closed
- Throttle valve control part defective
- Unmetered air

- Check throttle valve control part => Page 24-125

Display zone: 4

Possible fault cause

Fault elimination

Less than 176

- Alternator defective
- Battery discharged/defective

- Check control unit voltage supply => Page 24-108
Check alternator
Check battery

More than 212

- Voltage regulator defective

- Check voltage regulator

Display zone: 5

Possible fault cause

Fault elimination

Less than 0

- Not possible

---

More than 23

- Basic setting of throttle valve control part has not been performed
- Throttle valve control part defective
- Throttle cable adjustment

- Perform basic setting
=> Page 24-71
Adjust throttle cable => Repair group 20

Display zone: 6 + 7

Possible fault cause

Fault elimination

Less than 112

- Unmetered air after throttle valve

- Check intake air system for leaks => Page 24-125

More than 144

- Increased engine load

- Switch off consumer

Display zone: 8

Possible fault cause

Fault elimination

Less than 96

- Engine too rich, Lambda control weakens mixture
- Lambda control at limit
- Lots of fuel from activated charcoal filter
- Fuel pressure regulator defective/hose fallen off

- Check Lambda probe and Lambda control before catalyst => Page 24-121

More than 160

- Engine too lean, Lambda control enrichens mixture
- Unmetered air
- Injectors defective
- Lambda control at limit

- Check Lambda probe and Lambda control before catalyst => Page 24-117

128

- Shortage of fuel
- Lambda control blocked

- Check amount of fuel in tank
Check Lambda probe and Lambda control before catalyst => Page 24-26

Display zone: 9

Possible fault cause

Fault elimination

Less than 241 or
more than 14

- , evaluating display group 25

Display zone: 10

Possible fault cause

Fault elimination

Less than 118 or
more than 138

- , evaluating display group 25