Skoda OCTAVIA 2004 Workshop Manual page 177

OCTAVIA
Read measured value block
rpm 5.6 mg/H
Edition 12.00
S00.5111.54.20
Fuel Formation/Fuel Injection
1
→
1.480 V 87.3 °C
t t
♦ Vehicle system tester V.A.G 1552 with cable
V.A.G 1551/3, 3A, 3B or 3C
♦ Test box V.A.G 1598/22 or V.A.G 1598/31
The engine speed signal is required for the rev
counter and for the air conditioning. If an auto-
matic gearbox is fitted, it is also required for
calculating the shift points.
The signal shape which is generated by the
engine speed sender (G28), cannot be analysed
however and it is therefore first of all processed
in the engine control unit.
The engine speed is determined as follows:
- Read measured value block, display group
001; engine idling ⇒ page 01-38.
- Briefly operate full throttle.
Specification in display block 1:
K
The current engine speed must be displayed
(evenly over entire range). This engine speed
display must agree with the revs indicated
on the right counter.
If the specification is not achieved:
- Connect test box to the wiring loom to the
engine control unit ⇒ page 23-19.
.
- Test cable connection from rev counter to
contact 6 of test box for open circuit
⇒ Current Flow Diagrams, Electrical Fault
Finding, Fitting Locations binder.
.
- Test cable connection from rev counter to
contact 27 of test box for open circuit
⇒ Current Flow Diagrams, Electrical Fault
Finding, Fitting Locations binder.
and
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