Volkswagen Golf / Golf GTI / Jetta. Manual — part 136

01-123

If no electrical or wiring concerns are
found:

- Check wire for open circuit

between test box socket 46 and
terminal 4 on relay plate 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)

01-124

4. Activating Intake Manifold
Change-Over Valve -N156-:

- Press

button.

Output Diagnosis Test Mode

Intake Manifold Change-Over Valve -N156-

Indicated on display:

Note:

If there is sufficient vacuum the
Intake Manifold Change-Over Valve
-N156- activates the intake manifold
change-over valve actuator. The
change-over valve is located below
the intake manifold, on right next to
the Secondary Air Injection (AIR)
Solenoid Valve. Checking variable
intake manifold change-over

Page

24-117

.

If the valve does not click:

The Intake Manifold Change-Over

Valve must click until the next
final control element is activated
by pressing

button.

- Disconnect 2-pin connector from

Intake Manifold Change-Over
Valve -N156- (arrow).

Output Diagnosis Test Mode (DTM)

01-125

LED flashes:

- Connect LED test light VAG 1527

to 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:

- Switch off ignition.

- Replace Intake Manifold Change-

Over Valve -N156-

Page 24-

12

, item 2 .

- 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)

01-126

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)