1998 VOLKSWAGEN JETTA Service Manual

Downloaded from www.Manualslib.com manuals search engine 01-86



-
Press key.
Output Diagnostic Test Mode
-
Release brakes
Indicated on display
- Remove foot from brake pedal.
-
Press key.
Output Diagnostic Test Mode
-
Operate brakes
Indicated on display
- Operate brake pedal.
-
Press key.
Output Diagnostic Test Mode
-
IRR: 0V ORR: 0V Wheel RR locked
Indicated on display
Note:
If the wheel does not lock, there is a
possibility that there is a malfunction in the
mechanical/hydraulic part of the brake
system. - Indicate to 2nd mechanic which wheel
requires turning by hand.
Стр. 66из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

Downloaded from www.Manualslib.com manuals search engine 01-87



-
Press key.
Output Diagnostic Test Mode
-
IRR: VBAT ORR: 0V Wheel RR 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
-
IRR: VBAT ORR: VBAT Wheel RR 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.
Стр. 67из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

Downloaded from www.Manualslib.com manuals search engine 01-88



-
Press key.
ABS hydraulic pump -V64- no longer
runs.
Output Diagnostic Test Mode
-
IRR: VBAT ORR: 0V Wheel RR free
Indicated on display
If the brake pedal does not give, 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
Brake pedal must give perceptibly
Output Diagnostic Test Mode
-
IRR: 0V ORR: 0V Wheel RR locked
Indicated on display
Note:
If the wheel does not lock, there is a
possibility that there is a malfunction in the
mechanical/hydraulic part of the brake
system. - Indicate to 2nd mechanic which wheel
requires turning by hand.
Стр. 68из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

Downloaded from www.Manualslib.com manuals search engine 01-89



-
Press key.
Output Diagnostic Test Mode
-
Release brakes
Indicated on display
- Remove foot from brake pedal.
-
Press key.
Output Diagnostic Test Mode
-
EDL valves/Hyd-P: VBAT Wh FL/FR locked
Indicated on display (vehicles with EDL)
Note:
A 2nd mechanic is required to rotate the
respective wheel by hand.
If the wheels do not lock, there is a
malfunction in the hydraulic part of the ABS
system. 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
Стр. 69из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

Downloaded from www.Manualslib.com manuals search engine 01-90



-
Press key.
The ABS warning light -K47- goes out.
Function is unknown or
cannot be carried out at the moment
Indicated on display
The Output Diagnostic Test Mode (DTM) is
completed
-
Press key.
Rapid data transfer HELP
Select function XX Indicated on display
Note:
There is a malfunction in the system if
the ABS warning light -K47- does not go
out.
Adhere exactly to test sequence: First
check Diagnostic Trouble Code (DTC)
memory, then erase.
- End output (Function 06) Page 01
-56 .
Стр. 70из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

Downloaded from www.Manualslib.com manuals search engine 01-91


Basic setting, initiating

Special tools and equipment

Function 04 "Initiate basic settings"
performs several functions:
Note:
The basic setting to bleed the hydraulic unit
is only required when one chamber of the
brake fluid reservoir is completely empty.
The basic setting is used to bleed the
hydraulic unit only. The brake system
must be bleed separately.
Repair Manual, Brake System, Repair
Group 47
VAS 5234 Brake filler and bleeder unit
Display group 001 is required to bleed
the hydraulic system Page 01
-91
Стр. 71из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

Downloaded from www.Manualslib.com manuals search engine 01-92



Display group number 01: Bleeding
hydraulic unit.

Note:
All functions which could previously be
performed with V.A.G 1551 can also be
performed with the tester VAS 5051.
- Connect VAS 5234 Brake filler and
bleeder unit.
- Connect V.A.G 1551 Scan Tool and
select (address word 03) "Brake
electronics" with ignition switched on;
Page 01
-23
Rapid data transfer HELP
Select function XX Indicated on display
- Press keys 0 and 4. (The function
"Initiating basic setting" is selected with
04).
Rapid data transfer Q
04 - Basic settin
g
Indicated on display
- Confirm entry with key Q.
Стр. 72из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

Downloaded from www.Manualslib.com manuals search engine 01-93


Basic setting HELP
Enter dis
play group number XXX
Indicated on display:
- Press keys 0, 0 and 1
- Confirm entry with key Q.
System in basic setting 1
De
press pedal and hold...
Indicated on display:
- Operate pedal with substantial foot
pressure and hold.
Pedal moves down
Hydraulic pump runs
Pedal comes back
System in basic setting 1
Rel. pedal; FR/FL bleed screw OPEN <3> Indicated on display
- Press key 3 on V.A.G 1551 or arrow up
key on VAS 5051.
System in basic setting 2
Please wait...
(10 secs.)
Indicated on display
Hydraulic pump runs
System in basic setting 2
Depr. pedal 10X; bleed screw CLOSED <3> Indicated on display
- Press key 3 on V.A.G 1551 or arrow up
key on VAS 5051.
Стр. 73из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program