Volkswagen Golf / Golf GTI / Jetta. Manual — part 100

26-38

Secondary Air Injection (AIR)
pump motor -V101-, checking

Special tools and equipment

Note:

All functions which could previously
be performed with V.A.G 1551/1552
can also be performed with the
tester VAS 5051.

Test conditions

V.A.G 1551 Scan Tool (or

vehicle system tester V.A.G
1552) with cable V.A.G 1551/3

Fuses must be OK.

Secondary air system

26-39

Electrical Wiring Diagrams,

Troubleshooting & Component
Locations

Repair Manual, 2.8 Liter VR6 4V

Fuel Injection & Ignition, Engine
Code(s) BDF, Repair Group 01

Main fuses must be OK.

Battery voltage must be at least

11.5 V.

All electrical consumers, e.g.

lights and rear window defroster
must be switched off.

If the vehicle is equipped with air

conditioning, this must be
switched off.

Selector lever must be in

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

Intake and pressure hoses for

secondary air injection pump
motor not blocked or kinked

Fuel Pump (FP) relay -J17- must

be OK, checking:

No DTCs may be stored in DTC

memory:

Secondary air system

26-40

Test sequence

- Remove engine cover.

Note:

To release, press buttons together
on hose coupling.

Repair Manual, 2.8 Liter VR6 4V

Fuel Injection & Ignition, Engine
Code(s) BDF, Repair Group 01

If the motor runs, but little or no air
exits:

- Disconnect pressure hose to

combi-valve at coupling (arrow).

- Activate Secondary Air Injection

(AIR) pump relay -J299- via
output Diagnostic Test Mode
(DTM):

Secondary air injection pump

motor must run at intervals and
air must exit at outlet of pressure
hose.

- Press C key to abort output DTM.

Output Diagnostic Test Mode was aborted

Indicated on display

If the secondary air injection pump
motor does not run at intervals:

Repair Manual, 2.8 Liter VR6 4V

Fuel Injection & Ignition, Engine
Code(s) BDF, Repair Group 01

- Switch ignition off.

- Replace Secondary Air Injection

(AIR) pump motor -V101-

Page

26-27

, item 20 .

- Check activation of Secondary Air

Injection (AIR) pump motor -
V101-:

Secondary air system

26-41

Combi-valve, checking

Special tools and equipment

Test conditions

Repair Manual, 2.8 Liter VR6 4V

Fuel Injection & Ignition, Engine
Code(s) BDF, Repair Group 01

Repair Manual, 2.8 Liter VR6 4V

Fuel Injection & Ignition, Engine
Code(s) BDF, Repair Group 01

Test sequence

Note:

Do not use compressed air during
the following check!

VAG 1390 Hand vacuum pump

Vacuum lines and hose

connections free of leaks.

Pressure hose for secondary air

injection pump motor not
blocked or kinked.

Vacuum lines not blocked or

kinked.

No DTC stored in DTC memory:

Perform output Diagnostic Test

Mode (DTM):

- Remove engine cover.

Secondary air system