CHECKING
INTAKE
AIR
SENSOR
1.
Pull plugs off
of
intake air sensor.
2.
Connect ohmmeter to terminals 6 and
9.
Specifications: 200
to
400
ohm.
3.
Connect
ohmmeter
to terminals 7 and
8.
Specifications: 120
to
200
ohm.
4.
Connect ohmmeter
to
terminals 6 and
27
(temperature sensor
I).
Specifications: approx. 2000 ohms
at
room
temperature.
5.
Connect ohmmeter to terminals
36
and
39
(fuel pump contacts). When stator flap is
moved by hand (pump contacts close),
ohmmeter
needle
should move.
Replace
the
intake
air sensor
if
specifications
are
not
met.
CHECKING
THROTTLE
VALVE
SWITCH
1.
Pull plugs off
of
throttle valve switch.
2.
Connect ohmmeter
to
terminals 18 and
3.
Throttle valve closed: continuity
Throttle valve open: continuity
3.
Connect
ohmmeter
to terminals 18 and
2.
Throttle valve closed: continuity
"Throttle valve open: no continuity
Fuel
System,
Fuel
Injection
24
CHECKING
AUXILIARY
AIR
REGULATOR
1.
Remove auxiliary
air
regulator.
2.
Connect ohmmeter to both terminals
of
auxiliary air regulator and read
meter.
Specifications: approx.
30
ohm.
Replace regulator
if
necessary.
3.
Blow
in
air.
Regulator must be open
if
engine is cold.
4.
Connect battery to both terminals
of
removed auxiliary air
regulator.
As
the
heat
increases, the opening in
the
auxiliary•
air regulator must
become
smaller.
CHECKING
THERMO
TIME
SWITCH
1.
Pull plug off
of
cold start
valve.
2.
Connect ohmmeter between both contacts
of
plug.
3.
Both
contacts must
be
connected with
each
other
at
an engine
temperature
less than
0 0
approx +
35
C/95
F.
0 0
4.
Above approx +
35
C/95
F
the
ohmmeter
must
indicate
interruption.
Replace valve
if
necessary.
Printed in Germany
Checking Intake Air Sensor, Checking Throttle Valve Switch
24
-.7
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