Quick Check Of Injectors - Volvo 240 1989 Service Manual

Checks
Fuel sysrem L H2.4 - 240
Quick check of injectors
F1
1.
@
Turn on ignition
Depre ss diagn os tic socket bu tton three times. Each
press should last fo r alleast one seoond but nol more
than three .
At this poinl th e injectors will begin 10 operate, fol­
lowed by Ihe idle valve, etc. The diagnostic socket
lighl diode will lIash in a oontinuo us pattern.
The conlrol fun ction will repeat itself until interrupted,
either by tu rn ing
0"
th e Ignilion or by changing oontrol
function via the selector button.
2.
listen to and fe el
by
hand each injector to make sure
they all work.
If one does not function (no click can be heard),
change connector to a valve Ihal does work. It the
fault moves to one Ihal was
O.K.
before tilen the faull
Is
in the connector lead .
'---------~ ~
3,
It Ihe injeclor still doesn'l wOrk. Ihe fault is probably in
the injector.
Ch eck the injector separalely by connecting an ohm
meter between the injector pins.
Reading (depending somewhat on temperature)
shou ld be approx. 16!U .
4.
fin is h up
Turn
0 "
ignition and re move
all equipment.
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