Check The Rpm Signal From The Ignition System; Check The On/Off Function Of The Compressor - Volvo 240 1989 Service Manual

Fault tracing
Fuel system LH2.4 - 240
:(tc=c=-- c=nc=--c=n
3 3 2
n ~n-- ~nn--n
3 3 1
n --nn n
--c=
n n n
1 3 4
Al0
Turn the throttle control slightly
If the light diode turns off and then flashes the 3-3·2
code series, the throttle shutter switch function is
correct in Idle position.
II the light diode con tinues to flash rapidly, see C4 and
E9.
A11
Check the rpm signal from the fgnltlon system
Start the engine.
If Ihe fight diode turns off and then Dashes the 3' 3- 1
code seri es. Ihe rpm signal from Ihe ignition system
is corre ct,
II the engine won't sta rt, run the starter molO( until the
diode turns off.
II the diode continues to flash rapidly the ignition
system must be checked.
If the ignition system is faultfree, see A 13 and E1 -12 ,
A12
Vehicles with AC
Check the onloff funcllon of the compressor
Place the AC controls in the on position,
If the light diode turns off an d then " ashes the ' · 1·4
code series, the switch is OK.
II the light diode continues to flash rapidly,
see E16.
The light diode will now retum to rapid fl ashes prior to
the AC compressor turning on.
When the compressor turns on, the light diode should
turn off and then flash the 1-3-4 code series,
If
the light diode continues to flash rapidly,
see E15.
Turn engine off.
30