1996 SUBARU LEGACY air condition

OBD0489
BM: DTC P1103
—ENGINE TORQUE CONTROL SIGNAL
CIRCUIT MALFUNCTION (TRQ)—
DTC DETECTING CONDITION:

Two consecutive trips with fault
TROUBLE SYMPTOM:

Excessive shift shock
10BM1Check input signal for ECM.
10BM2Check harness between ECM and TCM
connector.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.

WIRING DIAGRAM:
B2M0598

328
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code

H2M1406
BN: DTC P1400
—FUEL TANK PRESSURE CONTROL
SOLENOID VALVE CIRCUIT MALFUNCTION
(PCVSOL)—
DTC DETECTING CONDITION:

Two consecutive trips with fault
10BN1Check output signal from ECM.

10BN2Check harness between fuel tank pressure
control solenoid valve and ECM connector.
10BN3Check harness between fuel tank pressure
control solenoid valve and ECM connector.
10BN4Check fuel tank pressure control solenoid
valve.
10BN5Check power supply to fuel tank pressure
control solenoid valve.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.




331
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code

H2M1410
BO: DTC P1401
—FUEL TANK PRESSURE CONTROL
SYSTEM FUNCTION PROBLEM (PCV
—F)—
DTC DETECTING CONDITION:

Two consecutive trips with fault
10BO1Check fuel tank pressure control solenoid
valve.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.

WIRING DIAGRAM:

LHD Model
B2M0928
337
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code

H2M1411
BP: DTC P1402
—FUEL LEVEL SENSOR CIRCUIT
MALFUNCTION (FLVL)—
DTC DETECTING CONDITION:

Two consecutive trips with fault
10BP1Check speedometer and tachometer operation
in combination meter.


10BP2Check ground circuit of combination meter.
10BP3Check input signal for ECM. (Using voltage
meter and Subaru Select Monitor.)
10BP4Check fuel level sensor.
10BP5Check fuel sub level sensor.
10BP6Check harness between fuel pump and fuel
sub meter unit connector.
10BP7Check ground circuit of fuel level sensor.
10BP8Check harness between ECM and fuel pump
connector.
10BP9
(LHD)
10BP10
(RHD)
Check harness between ECM, combination
meter and fuel pump connector.
10BP11Check harness between combination meter
and fuel pump connector.
10BP12Check combination meter.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.









339
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code

H2M1327
: Does the value change less than 0.12 V by
shaking harness and connector of ECM
while monitoring the value with Subaru
Select Monitor?

Subaru Select Monitor
Designate mode using function key.
Function mode: F45

F45: Fuel level sensor output signal is indicated.
: Repair poor contact in ECM connector.
: Even if MIL lights up, the circuit has returned to a
normal condition at this time. A temporary poor
contact of the connector may be the cause.
NOTE:
In this case, repair the following:

Poor contact in fuel pump connector

Poor contact in combination meter connector

Poor contact in ECM connector

Poor contact in coupling connectors (i3, B99 (LHD only),
B22, B98 (LHD)/B97 (RHD), and R57)
G2M0340
10BP4
CHECK FUEL LEVEL SENSOR.
1) Turn ignition switch to OFF.
2) Remove fuel pump access hole lid located on the right
rear of trunk compartment floor (Sedan) or luggage com-
partment floor (Wagon).
B2M0935
3) Disconnect connector from fuel pump.
4) Measure resistance between connector terminals of
fuel pump.
: Terminals
No. 3—No. 5:
Is the resistance less than 100Ω?
: Go to step10BP5.
: Replace fuel sending unit.
343
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code

OBD0527
BQ: DTC P1500
—RADIATOR FAN RELAY 1 CIRCUIT
MALFUNCTION (FAN
—1)—
DTC DETECTING CONDITION:

Two consecutive trips with fault
TROUBLE SYMPTOM:

Radiator fan does not operate properly.

Overheating
10BQ1Check output signal from ECM.

10BQ2Check power supply for relays.
10BQ3Check main fan relay 1, sub fan relay 1 and
main fan relay.
10BQ4Check open circuit in radiator fan relay 1
control circuit.
10BQ5Check short circuit in radiator fan relay 1
control circuit.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODE.




351
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code

OBD0538
BR: DTC P1502
—RADIATOR FAN FUNCTION PROBLEM
(FAN
—F)—
DTC DETECTING CONDITION:

Two consecutive trips with fault
TROUBLE SYMPTOM:

Occurrence of noise

Overheating
10BR1Check any other DTC (beside DTC P1502) on
display.
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.
358
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code

OBD0501
BS: DTC P1700
—THROTTLE POSITION SENSOR CIRCUIT
MALFUNCTION FOR AUTOMATIC
TRANSMISSION (ATTH)—
DTC DETECTING CONDITION:

Two consecutive trips with fault
TROUBLE SYMPTOM:

Shift point too high or too low; engine brake not effected
in“3”range; excessive shift shock; excessive tight corner
“braking”
10BS1Check DTC P1700 on display.
Check throttle position sensor circuit.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.

WIRING DIAGRAM:
B2M0613
10BS1
CHECK DTC P1700 ON DISPLAY.
: Does the Subaru select monitor or OBD-II
general scan tool indicate DTC P1700?
: Check throttle position sensor circuit.
NOTE:
For the diagnostic procedure on throttle position sensor
circuit, refer to 3-2 [T7K0].

361
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostics Chart with Trouble Code