Subaru IMPREZA 2002 Service Manual page 649

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Step
CHECK HARNESS BETWEEN TCM AND
CCM CONNECTOR.
1)Turn the ignition switch to OFF.
2)Disconnect the connectors from TCM and
CCM.
3)Measure the resistance of harness between
TCM and CCM connector.
Connector & terminal
(B54)
NO. 11-
(B94)
NO.
3 :
!
CHECK HARNESS BETWEEN TCM AND
CCM CONNECTOR.
Measure the resistance of harness between
TCM and chassis ground.
Connector & terminal
(854) No. 11
-
Chassis ground:
I CHECK INPUT SIGNAL FOR TCM.
1)Connect the connector to TCM and CCM.
2)Lift-up the vehicle or set the vehicle on free
rollers.
CAUTION:
On AWD models,
raise
all wheels off
ground.
3)Start the engine.
4)Turn the cruise control main switch to ON.
5)Move selector lever to " D and slowly
increase vehicle speed to 50 km/h (31 MPH).
6)Turn the cruise control command switch to
ON.
7)Measure the voltage between TCM and
chassis ground.
Connector & terminal
(B54) No. 11 (+)
-
Chassis ground ( - ) :
1 CHECK POOR CONTACT.
Check poor contact in TCM connector.
Check
f i
Is the resistance less than 10 Repair short circuit
a ?
in harness
between TCM and
CCM connector.
Is the resistance less than 1 V? Go to step 4.
s
connector? tact in TCM con-
nector.
No
3epair open circuil
n harness
jetween TCM and
;CM connector.
20 to step
3 .
;heck cruise con-
rol command
;witch circuit.
:Ref. to CC-7,
NSPECTION,
2ruise Control
2ommand
Switch.>
3eplace the TCM.
:Ref. to AT-45,
rransmission Con
rol Module
'TCM).>
EN(S0HC)-325