Porsche 928 Workshop Manual page 69

03
Maintenance, Self-diagnosis
928
Display:
32°F = 4400 Cl 6800 II
59-86°F =
1400 II - 3600 (2
104°F = 1000 n - 1300 IL
176°F = 250 R - 290 n
212°F =
100 n -
2100
If these values are not achieved during this test-
ing step, measurement must be carried out
directly on the engine temperature sensor.
Note:
When measuring the resistance of the engine
temperature sensor. always measure between
the contact lug and the housing, as this con-
tains two temperature sensors, independent of
one another.
Error code 1121
This error code indicates a fault in the area of
the air-flow sensor.
-- .
.Fiy
The engine temperature sensor makes the mix-
ture richer for cold or hot start.
In the event of an error, check with reference
to the circuit diagram.
Checking the voltage supply to the air-flow
sensor:
Ignition off
Disconnect the plug to the air-flow sensor
Connect terminals 17 and 21 of the discon-
nected LH control unit plug.
03 - 22
Trouble-shooting
Printed in Germany-XX, 1988
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