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OBD0535
10CT6CHECK MAIN FAN RELAY 1, SUB FAN
RELAY 1 AND MAIN FAN RELAY.
1) Turn ignition switch to OFF.
2) Measure resistance between main fan relay 1 termi-
nals. (With A/C models only)
: Terminal
No. 1—No. 3:
Is the resistance between 87 and 107Ω?
: Go to next step 3).
: Replace main fan relay 1.
OBD0536
3) Remove sub fan relay 1. (With A/C models only)
Remove main fan relay. (Without A/C models only)
4) Measure resistance between sub fan relay 1 or main
fan relay terminals.
: Terminal
No. 1—No. 3:
Is the resistance between 83 and 117Ω?
: Go to step10CT7.
: Replace sub fan relay 1.
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B2M0609A
10CT7CHECK OPEN CIRCUIT IN RADIATOR
FAN RELAY 1 CONTROL CIRCUIT.
1) Disconnect connector (F40) from fuse and relay box
(F/B).
2) Measure resistance of harness between ECM and main
fan relay 1 connector.
NOTE:
With A/C models only.
: Connector & terminal
(B84) No. 74—(F28) No. 3:
Is the resistance less than 1Ω?
: Go to next.
: Repair harness and connector.
NOTE:
In this case, repair the following:
Open circuit in harness between ECM and main fan
relay 1 connector
Poor contact in coupling connector (F45)
: Is there poor contact in ECM or main fan
relay 1 connector?
: Repair poor contact in ECM or main fan relay 1
connector.
: Go to next step 3).
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B2M0610A
3) Measure resistance of harness between ECM and sub
fan relay 1 (with A/C models) or main fan relay (without A/C
models) connector.
: Connector & terminal
(B84) No. 74—(F40) No. 4:
Is the resistance less than 1Ω?
: Go to next.
: Repair harness and connector.
NOTE:
In this case, repair the following:
Open circuit in harness between ECM and sub fan relay
1 (with A/C models) or main fan relay (without A/C models)
connector
Poor contact in coupling connector (F45)
Replace diode (A/C)
: Is there poor contact in ECM or sub fan
relay 1 (with A/C models) or main fan relay
(without A/C models) connector?
: Repair poor contact in ECM or sub fan relay 1 (with
A/C models) or main fan relay (without A/C mod-
els) connector.
: Contact with SOA service.
NOTE:
Inspection by DTM is required, because probable cause is
deterioration of multiple parts.
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OBD0538
CU: DTC P1502
—RADIATOR FAN FUNCTION PROBLEM—
DTC DETECTING CONDITION:
Two consecutive driving cycles with fault
TROUBLE SYMPTOM:
Occurrence of noise
Overheating
WIRING DIAGRAM:
B2M1290
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CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
NOTE:
If the vehicle, with the engine idling, is placed very close to
a wall or another vehicle, preventing normal cooling
function, the OBD system may detect malfunction.
10CU1CHECK ANY OTHER DTC (BESIDE DTC
P1502) ON DISPLAY.
: Is there any other DTC on display?
: Inspect the relevant DTC using“10. Diagnostics
Chart with Trouble Code”.
: Check engine cooling system.
[K100].>
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B2M1140
CV: DTC P1507
—IDLE CONTROL SYSTEM MALFUNCTION
(FAIL-SAFE)—
DTC DETECTING CONDITION:
Two consecutive driving cycles with fault
TROUBLE SYMPTOM:
Engine keeps running at higher revolution than specified
idling revolution.
WIRING DIAGRAM:
B2M1311
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
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10CV1
CHECK DTC P0505 ON DISPLAY.
: Does the Subaru select monitor or OBD-II
general scan tool indicate DTC P0505?
: Inspect DTC P0505 using“10. Diagnostics Chart
with Trouble Code”.
NOTE:
In this case, it is not necessary to inspect DTC P1507.
: Go to step10CV2.
10CV2
CHECK AIR INTAKE SYSTEM.
1) Turn ignition switch to ON.
2) Start engine, and idle it.
: Is there a fault in air intake system?
NOTE:
Check the following items.
Loose installation of intake manifold, idle air control sole-
noid valve and throttle body
Cracks of intake manifold gasket, idle air control sole-
noid valve gasket and throttle body gasket
Loose connections and cracks of idle air control solenoid
valve by-pass hoses
Disconnections of vacuum hoses
: Repair air suction and leaks.
: Replace idle air control solenoid valve.
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B2M1141
CW: DTC P1520
—RADIATOR FAN RELAY 1 CIRCUIT HIGH
INPUT—
DTC DETECTING CONDITION:
Two consecutive driving cycles with fault
TROUBLE SYMPTOM:
Radiator fan does not operate properly.
Overheating
WIRING DIAGRAM:
B2M1289
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODE.
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