1998 VOLKSWAGEN BORA brake

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-
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

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-
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

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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

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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

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System in basic setting 17
Partial bleedin
g ended
Indicated on display
-
Press key.
Rapid data transfer HELP
Select function XX Indicated on display
- Press keys -0- and -6- to end output.
Rapid data transfer Q
06 - End output Indicated on display
- Confirm entry with Q key.
Rapid data transfer Help
Enter address word XX Indicated on display
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; Bleeding brake system, vehicles
with and without ABS - Press C key.
- Switch ignition off.
- Disconnect connections to V.A.G 1551
Scan Tool.
- Bleed brake system.
Стр. 81из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

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Contact
Wiring connection to component ...
13
Longitudinal acceleration sensor -G251-(all-wheel drive vehicles with Haldex
coupling only)
14
Coding bridge to contact 3
15
Longitudinal acceleration sensor -G251-(four-wheel drive vehicles with Haldex
coupling only)
15
ESP Control lamp -K155- activation (vehicles with ABS/EDL/ASR only)
16
ABS warning light -K47- activation
17
Longitudinal acceleration sensor -G251-(four-wheel drive vehicles with Haldex
coupling only)
18
Brake light switch -F-
19
Right front ABS wheel speed sensor -G45-
20
Right front ABS wheel speed sensor -G45-
21
Vehicles with navigation system only
22
Right rear ABS wheel speed sensor -G44-
23
Right rear ABS wheel speed sensor -G44-
24
Ground point left in engine compartment and Ground connection in engine
compartment wiring harness
25
Voltage supply from battery +
Стр. 7из 31 ABS, ABS/EDL and ABS/EDL/ASR ITT Mark 20 IE, electrical check

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Test step overview
To test component

Voltage supply for ABS hydraulic pump -V64- to ABS control module
(w/EDL) -J104- - Perform test
step 1
Voltage supply for valves in ABS hydraulic unit -N55- to ABS control
module (w/EDL) -J104- - Perform test
step 2
Voltage supply (terminal X) on ABS control module (w/EDL) -J104-
- Perform test
step 3
Function of brake light switch -F-
- Perform test
step 4
Resistance of right front ABS wheel speed sensor -G45-
- Perform test
step 5
Resistance of left front ABS wheel speed sensor -G47-
- Perform test
step 6
Resistance of right rear ABS wheel speed sensor -G44-
- Perform test
step 7
Resistance of rear left ABS wheel speed sensor -G46-
- Perform test
step 8
Voltage signal of right front ABS wheel speed sensor -G45-
- Perform test
step 9
Voltage signal of left front ABS wheel speed sensor -G47-
- Perform test
step 10
Стр. 8из 31 ABS, ABS/EDL and ABS/EDL/ASR ITT Mark 20 IE, electrical check

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To test component

Voltage signal of right rear ABS wheel speed sensor -G44-
- Perform test step 11
Voltage signal of rear left ABS wheel speed sensor -G46-
- Perform test step 12
Coding bridge
- Perform test step 13
Voltage supply for V.A.G 1551, T16 connector
- Perform test step 14
Resistance of K wire for On Board Diagnostic (OBD), T16 connector
- Perform test step 15
Function of ABS warning light -K47-
- Perform test step 16
Function of warning light for brake system -K118-
- Perform test step 17
Function of ABS hydraulic pump -V64-
- Perform test step 18
Check of data bus wiring
- Perform test step 19
Activation of longitudinal acceleration sensor -G251-
1)
- Perform test step 20
Function of ESP Control lamp -K155-
- Perform test step 21
1) All-wheel drive vehicles with Haldex coupling only.
Стр. 9из 31 ABS, ABS/EDL and ABS/EDL/ASR ITT Mark 20 IE, electrical check