Volkswagen Golf / Golf GTI / Jetta. Manual — part 201

24-58

- Additionally check wiring for short to one

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

Specification:

If no wiring malfunction is detected:

- Replace Mass Air Flow (MAF) sensor -G70-

Page 24-30

, item 6 .

- 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

24-59

Throttle Valve Control Module -J338-,
checking

Note:

Only gold plated terminals may be used to

service the terminals in the connector of the
Throttle valve control module -J338-.

Components of Throttle valve control module -

J338-: Throttle drive (power accelerator
actuation) -G186-, Angle sensor -1- for throttle
drive (power accelerator actuation) -G187- and
Angle sensor -2- for throttle drive (power
accelerator actuation) -G188-.

Note:

If the Throttle valve control module -J338- is

replaced, the new control module must be
adapted to the Motronic Engine Control Module
(ECM) -J220-

Page 24-182

.

On vehicles installed with an automatic

transmission the transmission control module
must also be adapted:

Repair Manual, 4 Spd. Automatic

Transmission 01M On Board Diagnostic (OBD);
Repair Group 01

Components, checking

24-60

Special tools and equipment

Note:

All functions which could previously
be performed with VAG 1551/1552
can also be performed with the VAS
5051.

VAG 1551 Scan tool (or VAG

1552) with VAG 1551/3 adapter
cable

VAG 1526 or Fluke 83 Hand

multimeter or VAG 1715
multimeter

VAG 1594 Adapter set

VAG 1598/31 Test box

Electrical Wiring Diagrams

Components, checking

24-61

Test requirements

Electrical Wiring Diagrams,

Troubleshooting & Component
Locations

The fuses must be OK.

The battery voltage must be at

least 11.5 V.

All electrical accessories, e.g.

lights and rear window defroster
must be switched off.

If the vehicle is equipped with air

conditioning, it must be turned
off.

Selector lever must be in

position "P" or "N" on vehicles
with an automatic transmission.

Fuel Pump (FP) Relay -J17-

must be OK., checking:

Engine Coolant Temperature

(ECT) must be at least 85 C,

display group 1, display zone

2.

Throttle valve not damaged or

contaminated/dirty.

Components, checking