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944 Maintenance, Self-diagnosis
03
Actuator and input signal function
checking
An actuator and input signal function check
can be carried out independently of an error
diagnosis. This function check tests
individual
components or electrical signals with
respect
to their functioning or signal paths.
Functions
ara triggered from the diagnosis tester.
During
functional checking of components, these
must audibly or tangibly operate and can
thus
be detected as being electrically in proper
working order or defective.
An error display via the tester is not possible
in
this mode, but faulty input signals or their
wiring connection ara detected by the tester.
Starting actuator and input signal
function check
Ignition off
Press the yellow key until the function symbol
(see display) appears on the function display.
Display:
Prass the green key until the clear symbol
ap-
pears on the function display.
Display:
Switch on the ignition within 8 seconds.
Actuator and input signal function checking
Printed in Germany - XVI, 1987
03 - 7