Volkswagen Golf / Golf GTI / Jetta. Manual — part 163

01-194

Evaluating display group 4, display zone 2 - control module voltage supply

Appears on

display

Possible cause

Corrective action

Less than

specified

Alternator faulty, battery charge

state low

Repair Manual, Electrical

Equipment; Repair Group 27

- Check alternator and
battery voltage, charge
battery:

Battery heavily loaded shortly after

starting due to high charging current
and accessories

- Increase revs slightly for a
few minutes and switch off
accessories

Transfer resistance in current supply

or the Motronic Engine Control
Module (ECM) -J220- Ground (GND)
connection

- Check Motronic Engine
Control Module (ECM) -J220-
voltage supply

Page 24-

163

Current draw when ignition is off

- Eliminate current draw

Greater than

specified

Voltage control on alternator faulty

Repair Manual, Electrical

Equipment; Repair Group 27

- Check voltage control,
replace if necessary:

Excess voltage due to slave starting

or quick charging unit

- Check DTC memory

Page 01-23

, DTC memory,

checking and erasing

Measured value (data) blocks

01-195

Evaluating display group 4, display zone 3 - Engine Coolant Temperature (ECT)

Appears on

display

Possible cause

Corrective action

Less than

specified

Engine too cold

- If necessary perform road test

Engine Coolant

Temperature (ECT)
sensor -G62- faulty

- Check Engine Coolant Temperature
(ECT) sensor -G62-

Page 24-69

Greater than

specified

Radiator contaminated

- Clean radiator

Coolant fan not

functioning

Repair Manual, 2.8 Liter VR6 4V

Engine Mechanical, Engine Code(s):
BDF; Repair Group 19

- Check coolant fan:

Thermostat sticking/faulty

Repair Manual, 2.8 Liter VR6 4V

Engine Mechanical, Engine Code(s):
BDF;Repair Group 19

- Check thermostat:

Engine Coolant

Temperature (ECT)
sensor -G62- faulty

- Check Engine Coolant Temperature
(ECT) sensor -G62-

Page 24-69

Constant -

42.0 C

Constant

136.0 C

Engine Coolant

Temperature (ECT)
sensor -G62- faulty

- Check Engine Coolant Temperature
(ECT) sensor -G62-

Page 24-69

Measured value (data) blocks

01-196

Evaluating display group 4, display zone 4 - Intake air temperature (IAT)

Appears on

display

Possible cause

Corrective action

Less/greater than

specified

Intake Air Temperature

(IAT) sensor -G42- faulty

- Check Intake Air Temperature
(IAT) sensor -G42-

Page 24-81

Constant -37.0

C

Constant 126.0

C

Measured value (data) blocks

01-197

Display group 5 - Basic function

Engine running at idle

Read measured
value block 5

Indicated on display

xxxx
rpm

xxx.x

%

xxx

km/h

Text

1

2

3

4

Display zones

Specification Evaluation

Operating mode:

idling, part throttle,
enrichment, overrun, wide
open throttle

Idle speed

---

Vehicle speed

0 km/h

---

Engine load

12.0...26.0 %

Page 01-

201

Engine speed (idle speed)

640...720 rpm

Page 01-

188

Note on display zone 2:

The engine load at idling is given as the specification.

Measured value (data) blocks