Subaru IMPREZA 2002 Service Manual page 146

I
DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
I
CHECK ENGINE GROUND TERMINALS.
!
CHECK GROUND CIRCUIT OF ECM.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from ECM.
3)Measure the resistance of harness between
ECM and engine ground.
Connector & terminal
Non-turbo model
(6134) No. 27
-
Engine ground:
( 6 134) No. 8
-
Engine ground:
(6134) No. 7
-
Engine ground:
(6136) No. 21 -Engine ground:
(6136) No. 22
-
Engine ground:
(6134) No. 35
-
Engine ground:
(6134) No. 34
-
Engine ground:
(6134) No. 7
-
Engine ground:
(6134) No. 15
-
Engine ground:
(6134) No. 22
-
Engine ground:
(6136) No. 8
-
Engine ground:
(6136) No. 17
-
Engine ground:
(6136) No. 18
-
Engine ground:
(6137) No. 8
-
Engine ground:
(6137) No. 9
-
Engine ground:
Turbo model
_I ~
t
CHECK THROTTLE POSITION SENSOR.
1)Disconnect the connector from throttle posi-
tion sensor.
2)Measure the resistance between throttle
position sensor connector receptacle's termi-
nals.
Terminals
Non-turbo model
Turbo model
NO. 4
-
NO. 2:
NO. 1
-
NO. 2:
I CHECK THROTTLE POSITION SENSOR.
Measure the resistance between throttle posi-
tion sensor connector receptacle's terminals.
Terminals
NO. 2
-
NO. 3:
> CHECK HARNESS CONNECTOR BETWEEN
i
TCM AND THROTTLE POSITION SENSOR.
1)Disconnect the connector from TCM.
2)Measure the resistance of harness between
TCM and throttle position sensor connector.
Connector & terminal
Non-turbo model
Turbo model
(655) NO. 2
-
(€13) NO. 3:
(B54) NO. 3
-
(E13) NO. 3:
CHECK HARNESS CONNECTOR BETWEEN
TCM AND THROlTLE POSITION SENSOR.
Measure the resistance of harness between
TCM and throttle position sensor connector.
Connector & terminal
Non-turbo model
Turbo model
(655) NO. 1
-
(€13) NO. 4:
(654) NO. 2
-
(€13) NO. 4:
Check
-lave engine ground terminals
ieen tightened?
s the resistance less than 5
3?
s
the resistance between 3.0
2nd 4.2 kfi?
s
the resistance between 0.35
md 0.5 kR?
s the resistance less than 1
n?
s
the resistance less than 1
n?
Yes
20 to step 2.
:o to step 3.
20
to step 4.
;o to step 5.
20
to step 6.
;o to step 7.
No
righten the engine
ground terminals.
3epair open circuit
n harness
letween ECM
:onnector and
mgine grounding
erminal.
3eplace the throt-
le position sensor.
3eplace the throt-
le position sensor.
3epair open circuit
n harness
ietween TCM and
hrottle position
sensor connector,
3nd poor contact
n coupling con-
lector.
3epair open circuit
n harness
ietween TCM and
hrottle position
sensor connector,
md poor contact
n coupling con-
lector.
AT-54