F1
A
E
NG
INE
D
AI
LY
426
B
as
e
-
M
ay
2004
P
rin
t
603.
93.
281
BLINK
CODE
EDC
LAMP
POSSIBLE
CAUSE
POSSIBLE
TROUBLE
TESTS OR
RECOMMENDED ACTION
NOTES
1.5
Off
Clutch switch: signal not
plausible
(at
the
EDC
control unit it seems the
speed of the vehicle has
changed from 0 to at least
30 km/h without the clutch
getting pressed) or not
present.
Cruise Control / PTO fail to
work.
Read status parameters with the
diagnosis instrument to check correct
switchover on pressing the pedal.
If the result is negative, use a
multimeter on the component to
check continuity and switchover on
pressing the pedal between pins 1 and
2.
If the switch is sound, check the
continuity of the wiring between
switch pin 2 and EDC connector B38.
With the key ON, check there is
voltage (approx. 12V) between EDC
pin B31 and earth. Also check the fuse
24 and the wiring between the switch
pin 1 and pin 13 of fuse 24.
If everything turns out satisfactory with the check,
the trouble could be with not pressing the clutch
fully down (it is sometimes possible to change
gear without operating the switch).
1.6
On
Brake switch — signals not
plausible between primary
and secondary.
Brake lights might not work.
The Cruise Control / PTO
fails to work.
Read status parameters with the
diagnosis instrument to check correct
and simultaneous switchover of the
primary and secondary brake switches.
If the outcome is negative, use a
multimeter to check the integrity and
correct switchover of the switches
(one between pins 3 and 2 and the
other between pins 1 and 2).
If the switches are sound, with the key
ON and the pedal pressed (brake lights
on), check for approx. 12V on EDC pin
B26 (secondary switch) and on EDC
pin B31 (primary switch). If there is no
voltage, check the wiring and the relays
between the switches
and EDC
connector.
Check the pedal switches are fitted correctly
(they must activate at the same time).
If the trouble occurs too frequently, change both
switches.