SUBARU LEGACY 1995 Service Repair Manual

OBD0333A

The purge control solenoid valve is on the evaporation
line between canister and throttle body. It is built on the
below of intake manifold.
DTC DETECTING CONDITION:

Two consecutive trips with fault
1.Check transmission type.
AT
MT
Check AT/MT identification circuit. <Ref. to [T11BN0].>
2.Check any other DTC P0105, P0106, P0443
and P1102 on display.
Inspect P0105, P0106, P0443 and P1102 using“11 .
Diagnostics Chart with Trouble Code [T1100]”.

It is unnecessary to inspect DTC P0441.
3.Check purge control solenoid valve operation.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES. <Ref. to
[T3D0] and [T3E0].>
WIRING DIAGRAM:

LHD model
OBD0334


245
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostics Chart with Trouble Code

WIRING DIAGRAM:

RHD model
B2M0456
246
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostics Chart with Trouble Code

1
CHECK TRANSMISSION TYPE.
Refer to flow chart on page 245.
2CHECK ANY OTHER DTC P0105, P0106,
P0443 AND P1102 ON DISPLAY.
: Check that Subaru select monitor or the
OBD-II general scan tool shows P0105,
P0106, P0443 and P1102.
: Inspect the relevant DTC using“11. Diagnostics
chart with Trouble Code”.
: Go to step 3.
3CHECK PURGE CONTROL SOLENOID VALVE
OPERATION.
1) Turn ignition switch to OFF.
2) Connect test mode connector at the lower portion of
instrument panel (on the driver’s side), to the side of the
center console box.
3) Turn ignition switch to ON.
: Make sure that the ON/OFF operating sound
of purge control solenoid valve occurs at
about 0.3 Hz.
: Replace purge control solenoid valve.
: Go to next step.
4) Disconnect canister purge hose from canister.
: Blow through the canister purge hose to
check if pulsations occur.
: Check and repair loose connections, cracks, and
clogging in evaporation line.
: Replace purge control solenoid valve.
247
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostics Chart with Trouble Code

OBD0335
AF: DTC P0443
—EVAPORATIVE EMISSION CONTROL
SYSTEM PURGE CONTROL VALVE CIRCUIT
MALFUNCTION (CPC)—
DESCRIPTION:
Refer to“AE: DTC P0441—EVAPORATIVE EMISSION
CONTROL SYSTEM INCORRECT PURGE FLOW—
[T11AE0]”.
DTC DETECTING CONDITION:

Two consecutive trips with fault
TROUBLE SYMPTOM:

Erroneous idling
1.Check output signal from ECM.

2.Check harness.
3.Check harness.
4.Check purge control solenoid valve.
5.Check power supply to purge control solenoid
valve.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES. <Ref. to
[T3D0] and [T3E0].>



248
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostics Chart with Trouble Code

WIRING DIAGRAM:

LHD model
OBD0334
WIRING DIAGRAM:

RHD model
B2M0456
249
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostics Chart with Trouble Code

OBD0337A
1
CHECK OUTPUT SIGNAL FROM ECM.
1) Turn ignition switch to ON.
2) Measure voltage between ECM connector terminal and
body.
: Connector & terminal
(B84) No. 59—Body / 10 V, or more
: Go to step 2.
: Go to step 3.
OBD0337A
2
CHECK HARNESS.
1) Turn ignition switch to OFF.
2) Disconnect connector from purge control solenoid
valve.
3) Turn ignition switch to ON.
4) Measure voltage between ECM connector and body.
: Connector & terminal
(B84) No. 59—Body / 10 V, or more
: Repair short circuit of harness between ECM con-
nector and purge control solenoid valve connec-
tor.
: Go to next step.
OBD0338
5) Turn ignition switch to OFF.
6) Measure resistance between purge control solenoid
valve terminals .
: Terminals
No. 1—No. 2/1Ω, or less
: Replace purge control solenoid valve and ECM.
: Go to next.
: Is there poor contact in ECM connector?
: Repair poor contact in ECM connector.
: Replace ECM.
250
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostics Chart with Trouble Code

OBD0680A
3
CHECK HARNESS.
1) Turn ignition switch to OFF.
2) Disconnect connectors from purge control solenoid
valve and ECM.
3) Measure resistance between purge control solenoid
valve connector and body.
: Connector & terminal
(E4) No. 2—Body / 10Ω, or less
: Repair short circuit of harness between ECM con-
nector and purge control solenoid valve connec-
tor.
: Go to the next step.
4) Measure resistance between ECM and purge control
solenoid valve of harness connector.
OBD0681A
: Connector & terminal
(B84) No. 59—(E4) No. 2 / 10Ω, or less
: Go to step 4.
: Repair open circuit of harness between ECM con-
nector and purge control solenoid valve connec-
tor.
OBD0338
4
CHECK PURGE CONTROL SOLENOID VALVE.
1) Remove purge control solenoid valve.
2) Measure resistance between purge control solenoid
valve terminals.
: Terminals
No. 1—No. 2 / 10—100Ω
: Go to step 5.
: Replace purge control solenoid valve.
251
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostics Chart with Trouble Code

OBD0339A
5CHECK POWER SUPPLY TO PURGE CON-
TROL SOLENOID VALVE.
1) Turn ignition switch to ON.
2) Measure voltage between purge control solenoid valve
connector and body.
: Connector & terminal
(E4) No. 1—Body / 10 V, or more
: Confirm good connection at purge control sole-
noid valve connector.
: Repair open circuit of harness between main relay
connector and purge control solenoid valve con-
nector.
252
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostics Chart with Trouble Code

OBD0340
AG: DTC P0500
—VEHICLE SPEED SENSOR MALFUNCTION
(VSP)—
DESCRIPTION:

The speedometer system is an electric type; it uses no
speedometer cable and drives the speedometer according
to electric pick-up sensor (vehicle speed sensor 2).
The speed sensor 2 is installed on the transmission. The
speed sensor 2 sends the vehicle speed signal (8 pulses
per one turn of speed sensor driven shaft) to the speed
detection circuit in the speedometer where this signal pulse
wave is regulated.
The regulated pulse signal (4 pulses per one turn of speed
sensor driven shaft) is sent to the speedometer drive cir-
cuit and odometer (trip meter) drive circuit.
The output signal from vehicle speed detection circuit is
also used in ECM, TCM, etc.
B6H0022A
B6H0021A

The speed sensor 2 consists of a magnetic resistance
element, magnet ring, driven shaft, spring, etc.
As the driven key rotates, the magnet turns to change the
magnetic field of the coil.
The coil generates power corresponding to a change in the
magnetic field.
One turn of the driven key in the vehicle speed sensor 2
sends 8 pulses of AC signal to the combination meter.
DTC DETECTING CONDITION:

Immediately at fault recognition
253
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostics Chart with Trouble Code

1.Check speedometer operation in combination
meter.
2.Check harness.
3.Check harness.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES. <Ref. to
[T3D0] and [T3E0].>
WIRING DIAGRAM:
OBD0343


254
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostics Chart with Trouble Code