Skoda OCTAVIA MK1 Service Manual page 237

measured value block" and further select
display group 098.
Check the operating state of the throttle valve control
unit in display field 3.
Specified value: 00000000
Meaning of the digits in the 8-digit numerical block for
the operating condition of the throttle valve control
unit:
000 xxxx
0
000 not assigned
0
1 During the adaptation of the throttle valve control unit, a fault has occured
(interrogate fault memory
1 Throttle valve control unit dead (clock ratio = 0)
1 Adaptation aborded due to a too low battery voltage (below 8 V)
1Idling switch separated (interrogate switch)
If the specified values are not reached:
– Adapt the engine control unit to the throttle valve control unit
– Repeat check.
If the nominal values are again not reached:
Test voltage supply of throttle valve control unit and cables to engine control unit
–
→ Anchor.
Check throttle valve potentiometer
Test condition
l Coolant temperature at least 80 °C
Test sequence
Connect vehicle system tester -V.A.G 1552- and select address word 01 "Engine
–
electronics". Ignition switched on.
Select 08 for the function "read measured value block" and further select display group
–
001.
In display field 2 check whether the coolant
temperature is above 80 °C.
– Switch over in display group 3 as follows:
Meaning, if display positions = 1
→ Chapter)
Reading measured value block 1
->
0/rpm
237
Reading measured value block 98
->
4.20 V 3.48 V
00
→ Chapter.
90°C 0.80 V
00000000
00000000