Subaru XT 1988 Service Manual page 374

FUEL INJECTION SYSTEM
TROUBLE CODE (42): IDLE SWITCH
To
Throttle s e n s 0 : t J
(Idle switch)
~
4 3 2 1
®
~'"
Control unit
~
[
~(Black)
: : :
~: D~-----\
[@.]
~
®
(Black)
®
(Black)
I I 111.J :1: : I I I l1
C
]
111 I
Fig. 95
Check if trouble code is outputted in
NO
_I
Check terminals of control unit.
I
D-check mode.
I
(See page 56.'
YES
Turn ignition switch OFF
(engine off).
(
Disconnect test mode connector.
)
Disconnect control unit connector-
Check if continuity exists between
terminals
25
(LW) of connector
(body side) and body when accelera·
YES
_I
Check if terminal 25 is open or dis-
1
NO
tor pedal is released and does not
I
connected.
I
exist when accelerator pedal is
~
YES
depressed.
NO
I
Repair terminal or harness.
I
Disconnect throttle sensor connector.
Check if continUity exists between
terminals
@
and
@
of connector
NO
J
Adjust throttle sensor as outlined in
I
(throttle sensor side) when accelera-
I
Chapter
2-7
on page
21.
tor pedal is released.
~
YES
I
NO
I
Check if continuity exists when
I
accelerator pedal is released. j
I
YES
NO
Check if there is no continuity when
J
I
accelerator pedal is depressed.
Replace throttle sensor.
YES
Repair harness.
91
1800
cc
model
2700
cc
model
2-7
L2·1508
I
Replace control unit.
1
J
j
I
Replace throttle sensor.