Volkswagen Golf / Golf GTI / Jetta. Manual — part 354

01-78

- Press

key.

Output Diagnostic Test Mode

-

IFL: VBAT OFL: 0V

Wheel FL locked

Indicated on display

If the brake pedal gives, there is a
malfunction in the hydraulic unit. In
this case the hydraulic unit must be
replaced.

Repair Manual, Brake System,

Repair Group 45; Hydraulic unit,
brake booster/brake master cylinder
- Assembly overview; Removing and
installing control module and
hydraulic unit

- Press

key.

ABS hydraulic pump -V64- must

run.

Brake pedal must not give.

Output Diagnostic Test Mode

-

IFL: VBAT OFL: VBAT

Wheel FL free

Indicated on display

Note:

If the wheel locks there is a
possibility that the brake lines to the
wheel calipers/cylinders have been
interchanged.

- Indicate to 2nd mechanic which

wheel requires turning by hand.

ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

01-79

ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

01-102

ABS,
ABS/EDL and
ABS/EDL/ASR
ITT Mark 20
IE, electrical
check

Special tools and
equipment

V.A.G 1598/21

Adapter

V.A.G 1594 A

Adapter set

V.A.G 1526 A

Multimeter

V.A.G 1921 Pliers

ABS, ABS/EDL and ABS/EDL/ASR ITT Mark 20 IE, electrical check

01-103

The test steps from

Page 01-111

are valid

for:

For vehicles on which the On Board Diagnostic

(OBD) does not give any indication of the
source of the malfunction, work through the
complete electrical check.

For vehicles on which the OBD provides a

direct indication of the source of the
malfunction, only carry out the test steps
recommended in the Diagnostic Trouble Code
(DTC) table (directed entry).

An overview of all the test steps in the electrical

check can be found on

Page 01-109

.

ABS, ABS/EDL and ABS/EDL/ASR ITT Mark 20 IE, electrical check