Skoda OCTAVIA MK1 Service Manual page 255

If the automatic gearbox control unit requests an ignition angle
relief, the display quickly jumps from "0" to "1".
The wiring to the automatic gearbox control unit is monitored
–
by the gearbox self-diagnosis (fault code 00545).
During gearshifts, if no read-out for the torque reduction is
performed in the measured value block or the fault code 00545
(in the automatic gearbox control unit) is shown:
For vehicles ► 07.97
Connect the test box -V.A.G 1598/22 - to the wiring loom of
–
the engine control unit
Test wiring of contact 23 of engine control unit for interruption
– and/or short-circuit
locations.
For vehicles 08.97 ►
– Test databus drive
Test signal of PAS pressure switch
For vehicles 08.97 ►
Special tools and workshop equipment required
t Vehicle system tester -V.A.G 1552 - with cable -V.A.G 1551/3-
Test sequence
Connect vehicle system tester -V.A.G 1552- and select address word 01 "Engine
–
electronics". Engine idling.
Select 08 for the function "read measured value block" and further select display group
–
019.
Observe display value in display field 4.
Specified value: x x x x x x 0 x
Turn the steering wheel up to the stop and observe the
– display value in the display field 4 (2nd position from
right).
Specified value: x x x x x x 1 x
– End the test using the function 06 "End output".
If the specified value is not reached:
Connect the test box -V.A.G 1598/22 - to the wiring
–
loom of the engine control unit
→ Chapter.
→ Current flow diagrams and Fitting
→ Chapter.
→ Chapter.
Reading measured value block 19
->
850/rpm
00000000
255
0 1