Subaru Legacy III (2000-2003 year). Service manual — part 374
EN(H6DO)-298
ENGINE (DIAGNOSTICS)
DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
7
CHECK INHIBITOR SWITCH GROUND LINE.
Measure resistance of harness between inhibi-
tor switch connector and engine ground.
Connector & terminal
(T7) No. 12 — Engine ground:
Is the measured value less than the specified
value?
5
Ω
Repair open circuit
in harness
between inhibitor
switch connector
and starter motor
ground line.
NOTE:
In this case, repair
the following:
• Open circuit in
harness between
inhibitor switch
connector and
starter motor
ground line
• Poor contact in
starter motor con-
nector
• Poor contact in
starter motor
ground
• Starter motor
8
CHECK INHIBITOR SWITCH.
By moving select lever to “N” and “P” positions,
measure resistance between inhibitor switch
connector socket terminal.
Terminals
No. 7 — No. 12:
Is the measured value less than the specified
value?
1
Ω
Replace inhibitor
switch. <Ref. to
AT-49, Inhibitor
Switch.>
9
CHECK SELECTOR CABLE CONNECTION.
Is there any fault in selector cable connection
to inhibitor switch?
There is a malfunction.
Repair selector
cable connection.
<Ref. to CS-12,
Select Cable.>
Contact SUBARU
distributor service.
NOTE:
Inspection by DTM
is required, be-
cause probable
cause is deteriora-
tion of multiple
parts.
Step
Value
Yes
No
EN(H6DO)-299
ENGINE (DIAGNOSTICS)
DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
MEMO:
EN(H6DO)-300
ENGINE (DIAGNOSTICS)
DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
CD:DTC P0864 — TCM COMMUNICATION CIRCUIT RANGE/PERFORMANCE —
• DTC DETECTING CONDITION:
• Two consecutive driving cycles with fault
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6DO)-54, OP-
ERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H6DO)-47, OPERATION, Inspec-
tion Mode.>.
• WIRING DIAGRAM:
EN-01099
B56
B135
20
21
B135 ECM
TCM
B56
1 2
7
8
9
5 6
3 4
10 11 12
19 20 21
13
14 15
16
17
18
22
23
24
5 6
7 8
2
1
9
4
3
10
24
22
23
25
11 12 13 14 15
26 27 28
16 17 18 19
20 21
EN(H6DO)-301
ENGINE (DIAGNOSTICS)
DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
Step
Value
Yes
No
1
CHECK DRIVING CONDITION.
1) Start and warm-up the engine until the radi-
ator fan makes one complete rotation.
2) Drive the vehicle.
Is AT shift control functioning properly?
Operates properly.
Replace TCM.
<Ref. to AT-76,
Transmission Con-
trol Module
(TCM).>
2
CHECK ACCESSORY.
Are car phone and/or CB installed on vehicle?
Equipped.
Repair grounding
line of car phone
or CB system.
Replace TCM.
<Ref. to AT-76,
Transmission Con-
trol Module
(TCM).>
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