Volkswagen Golf / Golf GTI / Jetta. Manual — part 138

01-131

If no electrical or wiring concerns are
found:

- Check wire for open circuit

between test box socket 115 and
2-pin connector terminal 2
referring to Electrical Wiring
Diagrams.

Wire resistance: max. 1.5

- Additionally check wire for short

to battery positive and Ground
(GND).

Specification:

- Check wire for open circuit

between 2-pin connector terminal
1 and Motronic Engine Control
Module (ECM) Power Supply
Relay -J271- referring to Electrical
Wiring Diagrams.

Wire resistance: max. 1.5

- Replace Motronic Engine Control

Module (ECM) -J220-

Page 24-

173

.

- Check DTC memory, repair

Diagnostic Trouble Codes (DTCs)
if necessary and then erase DTC
memory

Page 01-23

, DTC

memory, checking and erasing.

- Erase learned values and adapt

Motronic Engine Control Module
(ECM) -J220- again

Page 24-

182

.

- Read readiness code

Page 01-

146

. If the DTC memory has

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

Page 01-149

.

Output Diagnosis Test Mode (DTM)

01-132

6. Activating Leak detection pump
(LDP) -V144-:

- Press

button.

Output Diagnosis Test Mode

Leak Detection Pump tank ventilation system

Indicated on display:

If the Leak Detection Pump (LDP) -
V144- does not run at intervals:

Repair Manual, Body Exterior;

Repair Group 66; Exterior
equipment, Wheel housing liner

The LDP must click, at intervals,

until the next final control element
is activated by pressing

button.

- Remove rear right wheel housing

liner:

- Disconnect 3-pin connector from

Leak Detection Pump (LDP) -
V144- (arrow).

Output Diagnosis Test Mode (DTM)

01-133

LED flashes:

- Connect LED test light VAG 1527

terminals 2 and 3 of detached
connector using adapter cables
from VAG 1594.

LED must flash (bright/darker)

- Press -C- button to abort output

Diagnosis Test Mode (DTM).

Output Diagnosis Test Mode was aborted

Indicated on display:

Repair Manual, 2.8 Liter VR6 4V

Engine Mechanical, Engine Code(s):
BDF; Repair Group 20

- Switch off ignition.

- Replace Leak Detection Pump

(LDP) -V144-:

- Check DTC memory, repair

Diagnostic Trouble Codes (DTCs)
if necessary and then erase DTC
memory

Page 01-23

, DTC

memory, checking and erasing.

- Read readiness code

Page 01-

146

. If the DTC memory has

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

Page 01-149

.

Output Diagnosis Test Mode (DTM)

01-134

LED does not flash:

- Press -C- button to abort output Diagnosis Test

Mode (DTM).

Output Diagnosis Test Mode was aborted

Indicated on display:

Repair Manual, Electrical Equipment; Repair

Group 92

- Switch off ignition.

- Remove wiper arms and cowl panel:

- Connect test box VAG 1598/31 to control

module wiring harness. Engine Control Module
(ECM) -J220- remains disconnected.

Output Diagnosis Test Mode (DTM)