Skoda Octavia1999 Service Manual page 28

01
Readout on V.A.G 1552
17744
Engine torque monitor
Control limit exceeded
17746
Bank 1, camshaft position
sensor => sender -G163
Open/short to positive
17748
Camshaft position/crank-
shaft position sensor
Incorrect assignment
The camshaft position sensor -G163- is identical with the Hall sender -G40-.
1)
------------ 01-20 ------------
Possible cause of fault
♦ Leak in intake system
♦ Throttle valve control unit
-J338 faulty or accelerator
pedal position sender
-G79 and -G185 faulty;
possible cable fault
1)
♦ Signal input in engine con-
trol unit faulty (engine con-
trol unit faulty)
♦ -G163 faulty
♦ Loose contact
♦ Open circuit or short cir-
cuit to positive or to earth
between camshaft posi-
tion sensor -G163 and en-
gine control unit
♦ Signal from camshaft sen-
sor not within tolerance
Self-Diagnosis
Possible effects
♦ Engine runs in emergency
mode
♦ Altered idling speed
♦ Engine does not rev up to
maximum speed
♦ Poor performance
♦ Start problems
OCTAVIA
Rectifying fault
- Test intake system for
leaks ⇒ page 24-22.
- Test throttle valve control
unit ⇒ page 24-56.
- Test accelerator pedal po-
sition sender
⇒ page 24-62.
- Test camshaft position
sensor -G163-
⇒ page 28-6.
- Rectify open circuit in wir-
ing or short circuit accord-
ing to CFD
⇒ Current Flow Diagrams,
Fault Finding and Fitting
Locations binder
- Test camshaft position
sensor -G163-
⇒ page 28-6.
- Read measured value
block, display group 012,
display block 3
⇒ page 01-37.
Edition 06.00
S00.5126.51.20