Subaru XT 1988 Service Manual page 314

FUEL INJECTION SYSTEM
2-7
1800 cc
Fuel injector
No.1
Fuel injector
No.2
Fuel injector
No.3
Fuel injector
No.4
®
Control unit
49
W
50
W
51
WL
52
WL
ciIQ)
(Black)
~
®
(Black)
1--~1---4
Resistor
Fig. 47
2700cc model
INSPECTION
Using a stethoscope or a long-type screwdriver, make sure of
operating noise (clicking sound) of each injector.
If this operating noise cannot be heard on any ir.jector:
1) Disconnect the control unit connector.
Measu re voltage across the body and term inals 49 (W), 50 (W),
51 (WRl, 52 (WR), 53 (WY) and 54 (WY) of control unit con-
nector (body side), respectively.
Specified voltage:
12V
If voltage is below 10V in any line, the affected harness from
the battery to the control unit through the resistor and
injector is broken or shorted.
27
(Black)
Fusible link
L2-1471
2) Disconnect each fuel injector connector.
Measure resistance between the terminals of each injector.
Specified resistance:
Approx. 13.8
fl
If resistance is greater than 1 Mfl, the affected circuit is
broken. If 0 fl, the circuit is shorted. Replace the injector.
Fig.
48