Volkswagen Golf / Golf GTI / Jetta. Manual — part 238

24-206

Brake Light Switch -F- and
Brake Pedal Switch (cruise
control/Diesel Direct Fuel
Injection) -F47- signal,
checking

Special tools, materials 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

Additional signals, checking

24-207

Test requirements

Test sequence

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.

- Connect VAG 1551 Scan tool (or

VAG 1552). Then switch ignition
on and select Motronic Engine
Control Module (ECM) -J220- with
"Address word" 01. ((VAG 1551
and Motronic Engine Control
Module (ECM) -J220-, connecting
and selecting

Page 01-12

).

Rapid data transfer

HELP

Select function XX

Indicated on display:

Additional signals, checking

24-208

- Press buttons -0- and -8- for function "Read

measured value (data) block" and confirm entry
with -Q- button.

Read measured value block

Input display group number XXX

Indicated on display:

- Press buttons -0-, -6- and -6- for "Display group

number 66" and confirm entry with -Q- button.

Read measured value block 66

1

2

3

4

Indicated on display: (1 to 4

display zones)

If the specifications are not obtained:

- Observe display in display zone 2: (7th and 8th

positions from left).

Specification: xxxxxx00

- Depress brake pedal and observe display in

display zone 2.

Specification: xxxxxx11

- Press

button.

- Press buttons -0- and -6- for function "End

output" and confirm entry with -Q- button.

- Switch off ignition.

- Remove cover in footwell (driver's side).

Additional signals, checking

24-209

- Disconnect 4-pin connector from Brake Light

Switch -F- and Brake Pedal Switch (cruise
control/Diesel Direct Fuel Injection) -F47-

If the specifications are not obtained:

- Measure resistance between terminals 1 and 4

of switch.

Specification:

Brake pedal not depressed:

Brake pedal depressed: max. 1.5

- Measure resistance between terminals 2 and 3

of switch.

Specification:

Brake pedal not depressed: Max. 1.5

Brake pedal depressed:

- Replace Brake Light Switch -F- and Brake Pedal

Switch (cruise control/Diesel Direct Fuel
Injection) -F47-.

- Check DTC memory, repair malfunctions if

necessary and then erase DTC memory

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

.

Additional signals, checking