1998 VOLKSWAGEN JETTA ignition

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V.A.G 1551
print-out Possible cause
Repair
01312
Drive train data
bus faulty
1)


or:
ABS control module (w/EDL) -
J104- incorrectly coded

Engine control module
incorrectly coded
Repair group 01 for relevant
engine code - Check ABS control module
(w/EDL) -J104- coding Page 01
-
58
- Check engine control module
coding

Open circuit, short to positive or
Ground in the wiring - Check wiring and connections
using wiring diagram

- Perform electrical checks Page
01-102
Drive train data
bus faulty
1)

Sporadic
Ignition/starter switch turned
too slowly - Erase DTC memory Page 01-56
- No further measures required
- Inform customer
1) The DTC "Drive train data bus" will not cause the ABS warning light -K47- or warning light for
brake system -K118- to light up. The ABS function is retained over the complete range.
Стр. 32из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

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V.A.G 1551
print-out Possible cause
Repair
18256
Check Engine
Control Module
(ECM) memory
DTC in ECM
Repair Manual, Fuel Injection & Ignition, Repair
Group 01 for relevant engine code - Check engine control module DTC memory
65535
Control module
faulty ABS Control
Module (w/EDL)
-J104- faulty Repair Manual, Brake System, Repair Group 45;
Hydraulic unit, brake booster/brake master cylinder -
Assembly overview; Removing and installing control
module and hydraulic unit - Replace ABS control module (w/EDL) -J104-
Стр. 35из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

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Warning!
DTC memor
y was not interrogated.
Indicated on display
Note:
Adhere exactly to test sequence: First
check DTC memory, then erase
2. Ending output
- Press keys -0- and -6-, to end output.
Rapid data transfer Q
06 - End output Indicated on display
- Confirm input with Q key.
Rapid data transfer HELP
Select function XX Indicated on display
ABS warning light -K47- and warning light
for brake system -K118- must go out after
approx. 2 seconds. - Switch ignition off.
- Disconnect V.A.G 1551 Scan Tool at
Data Link Connector (DLC).
- Switch ignition on.
Стр. 37из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

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ABS control module, coding

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

Warning light for ABS -K47- and warning light
for brake system -K118- flash when control
module is coded with 00000. An entry is not set
in the DTC memory.

The ABS control module (w/EDL) -J104- must
be recoded if the vehicle relevant coding is not
displayed or the control module has been
replaced.
Coding is only possible after the workshop code
(WSC) has been entered into the V.A.G 1551
Scan Tool.

Test sequence

- Connect V.A.G 1551 Scan Tool and select
(address word 03) "Brake electronics" with
ignition switched on; Page 01
-23

- Establish which type of ABS hydraulic control
module is installed Page 01
-4 .

- Establish engine code.
Стр. 38из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

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- Connect V.A.G 1551 Scan Tool and select
address word 03 for"Brake electronics" with
ignition switched on; Page 01
-23
Rapid data transfer HELP
Select function XX Indicated on display
- Press keys 0 and 8 to select function "Read
measured value block".
Rapid data transfer Q
08 - Read measured value block Indicated on display
- Confirm entry with key Q.
Read measured value block
Enter dis
play group number XXX
Indicated on display
- Enter display group number List of selectable
display group numbers, Page 01
-64 .
Стр. 43из 81 ABS ITT Mk 20 IE On Board Diagnostic (OBD) program

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- Connect V.A.G 1551 Scan Tool.

- Switch ignition on.

- Press key -1- for "Rapid data transfer" operating
mode.

- Select brake electronics (address word 03);
Page 01
-23
Rapid data transfer Q
03 - Brake electronics Indicated on display
Note:
During the next work steps the ABS warning light -
K47- flashes. - Confirm entry with key Q.
- Read off control module version in V.A.G 1551
display.
-
Press key.
Стр. 56из 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