Volkswagen Golf / Golf GTI / Jetta. Manual — part 206

24-78

If no wiring malfunction is detected:

- Check wiring for open circuit

between test box and 4-pin
connector referring to Electrical
Wiring Diagrams.

Terminal 3 and socket 93

Terminal 4 and socket 108

Wire resistance: max. 1.5

- Additionally check wiring for short

to one another, to vehicle Ground
(GND) and to battery positive.

Specification:

- Perform resistance measurement

on Engine Coolant Temperature
(ECT) sensor -G62- terminal C
(signal) and D (Ground).

Components, checking

24-79

Scale A shows resistance values for

temperature range 0 to 50 C and
scale B the values for temperature
range 50 to 100 C.

Examples:

If the specification is not obtained:

30 C is in range A and

corresponds to a resistance of
1.5 to 2.0 k

80 C is in range B and

corresponds to a resistance of
275 to 375

- Replace Engine Coolant

Temperature (ECT) sensor -G62-
/ Engine Coolant Temperature
(ECT) sensor -G2-

Page 24-

16

, item 14 .

- Check DTC memory, repair

malfunctions if necessary and
then erase DTC memory

Page

01-23

.

- Read readiness code

Page 01-

146

. If DTC memory has been

erased or Motronic Engine
Control Module (ECM) -J220- was
disconnected from battery
positive (B+), readiness code
must be generated again

Page

01-149

.

Components, checking

24-80

If there is no Diagnostic Trouble Code (DTC) in

the wiring and the resistance measurement
values are OK.:

- Replace Motronic Engine Control Module (ECM)

-J220-

Page 24-173

.

- Check DTC memory, repair malfunctions if

necessary and then erase DTC memory

Page

01-23

.

- Erase learned values and adapt Motronic

Engine Control Module (ECM) -J220- again

Page 24-182

.

- Read readiness code

Page 01-146

. If DTC

memory has been erased or Motronic Engine
Control Module (ECM) -J220- was disconnected
from battery positive (B+), readiness code must
be generated again

Page 01-149

.

Components, checking

24-81

Intake Air Temperature (IAT) sensor
-G42-, checking

Note:

The Intake Air Temperature (IAT) sensor -

G42- is a component part of the Mass Air
Flow (MAF) sensor -G70- and cannot be
replaced individually.

Components, checking