Subaru Legacy IV (2008 year). Service manual — part 139
EN(H4SO)(diag)-159
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
Check
Yes
No
1
CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed?
Check the appro-
priate DTC using
the “List of Diag-
nostic Trouble
Code (DTC)”.
<Ref. to
EN(H4SO)(diag)-
80, List of Diagnos-
tic Trouble Code
(DTC).>
Replace the fuel
temperature sen-
sor. <Ref. to
EC(H4SO)-10,
Fuel Temperature
Sensor.>
EN(H4SO)(diag)-160
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
AM:DTC P0182 FUEL TEMPERATURE SENSOR “A” CIRCUIT LOW INPUT
DTC DETECTING CONDITION:
• Immediately at fault recognition
• GENERAL DESCRIPTION <Ref. to GD(H4SO)-71, DTC P0182 FUEL TEMPERATURE SENSOR “A”
CIRCUIT LOW INPUT, Diagnostic Trouble Code (DTC) Detecting Criteria.>
CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode <Ref. to EN(H4SO)(diag)-50,
OPERATION, Clear Memory Mode.>, and Inspection Mode <Ref. to EN(H4SO)(diag)-41, PROCEDURE,
Inspection Mode.>.
WIRING DIAGRAM:
EN-05707
R46
R67
B97
R1
R58
B83
30
17
*
*
2
3
4
18
B135
1
4
R58
R67
1
2
3 4 5 6
*
1 2 3 4
5 6 7 8
B83
B135
B97
1 2 3 4
5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20
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
29 30 31
32 33
34 35
1 2
3 4
5 6
FUEL TEMPERATURE
SENSOR
ECM
: TERMINAL No. OPTIONAL
ARRANGEMENT
EN(H4SO)(diag)-161
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
Check
Yes
No
1
CHECK CURRENT DATA.
1) Start the engine.
2) Read the data of fuel temperature sensor
signal using Subaru Select Monitor.
NOTE:
For detailed operation procedure, refer to
“READ CURRENT DATA FOR ENGINE”. <Ref.
to EN(H4SO)(diag)-33, Subaru Select Moni-
tor.>
Is the temperature 120°C
(248°F) or higher?
Go to step 2.
Even if DTC is
detected, the cir-
cuit has returned to
a normal condition
at this time. Repro-
duce the failure,
and then perform
the diagnosis
again.
NOTE:
In this case, tem-
porary poor con-
tact of connector
may be the cause.
2
CHECK HARNESS BETWEEN ECM AND
FUEL TEMPERATURE SENSOR CONNEC-
TOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM and
fuel temperature sensor.
3) Measure the resistance between ECM and
chassis ground.
Connector & terminal
(B135) No. 17 — Chassis ground:
Is the resistance 1 M
: or
more?
Replace the fuel
temperature sen-
sor. <Ref. to
EC(H4SO)-10,
Fuel Temperature
Sensor.>
Repair the ground
short circuit of har-
ness between
ECM and fuel
pump.
EN(H4SO)(diag)-162
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
AN:DTC P0183 FUEL TEMPERATURE SENSOR “A” CIRCUIT HIGH INPUT
DTC DETECTING CONDITION:
• Immediately at fault recognition
• GENERAL DESCRIPTION <Ref. to GD(H4SO)-72, DTC P0183 FUEL TEMPERATURE SENSOR “A”
CIRCUIT HIGH INPUT, Diagnostic Trouble Code (DTC) Detecting Criteria.>
CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode <Ref. to EN(H4SO)(diag)-50,
OPERATION, Clear Memory Mode.>, and Inspection Mode <Ref. to EN(H4SO)(diag)-41, PROCEDURE,
Inspection Mode.>.
WIRING DIAGRAM:
EN-05707
R46
R67
B97
R1
R58
B83
30
17
*
*
2
3
4
18
B135
1
4
R58
R67
1
2
3 4 5 6
*
1 2 3 4
5 6 7 8
B83
B135
B97
1 2 3 4
5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20
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
29 30 31
32 33
34 35
1 2
3 4
5 6
FUEL TEMPERATURE
SENSOR
ECM
: TERMINAL No. OPTIONAL
ARRANGEMENT
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