check engine light SUBARU LEGACY 1995 Service Owner's Guide
[x] Cancel search | Manufacturer: SUBARU, Model Year: 1995, Model line: LEGACY, Model: SUBARU LEGACY 1995Pages: 2248, PDF Size: 48.81 MB
Page 1308 of 2248
2. CHECK LIST FOR INTERVIEW
Check the following items when problem occurred.
Customer’s name Engine no.
Date of sale Fuel brand
Date of repair Odometer readingkm
miles
Vin no.
WeatherFineCloudyRainySnowyVarious/Other
Outdoor TemperatureHotWarmCoolCold (approx.°F/°C)
PlaceHighwaySuburbsInner CityUphillDownhill
Rough roadOther
Engine Temp.ColdWarming-upAfter warming-upAny temp.Other
Engine speed
0 2,000 4,000 6,000 8,000 rpm
Driving conditionsNot affected
At startingWhile idlingAt racing
While acceleratingWhile cruising
While deceleratingWhile turning (RH/LH)
Vehicle speed
0 10203040 5060MPH
HeadlightON /OFF
BlowerON /OFF
A/C compressorON /OFF
Cooling fanON /OFF
Front wiperON /OFF
Rear wiperON /OFF
Rear defoggerON /OFF
RadioON /OFF
CD/CassetteON /OFF
Car phoneON /OFF
CB
NOTE: Use copies of this page for interviewing customers.
102
2-7ON-BOARD DIAGNOSTICS II SYSTEM
7. Basic Diagnostics Procedure
Page 1309 of 2248
Check the following items about the vehicle’s state when
MIL turns on.
a) Other warning lights or indicators turn on.Ye s /No
1Low fuel warning light
2Charge indicator light
3AT diagnostics indicator light
4ABS warning light
5TCS warning light
6Engine oil pressure warning light
b) Fuel level
Lack of gasoline:Ye s /No
Indicator position of fuel gauge:
c) Intentional connecting or disconnecting of harness connectors or spark plug cords:Ye s /No
What:
d) Intentional connecting or disconnecting of hoses:Ye s /No
What:
e) Installing of parts other than genuine partsYe s /No
What:
Where:
f) Occurrence of noiseYe s /No
From where:
What kind:
g) Occurrence of smellYe s /No
From where:
What kind:
h) Intrusion of water into engine compartment or passenger compartmentYe s /No
i) Troubles occurred
1Engine does not start.
2Engine stalls during idling.
3Engine stalls while driving.
4Engine speed decreases.
5Engine speed does not decrease.
6Rough idling
7Poor acceleration
8Back fire
9After fire
10No shift
11Excessive shift shock
NOTE: Use copies of this page for interviewing customers.
103
2-7ON-BOARD DIAGNOSTICS II SYSTEM
7. Basic Diagnostics Procedure
Page 1369 of 2248
OBD0145A
1CONNECT SUBARU SELECT MONITOR OR
THE OBD-II GENERAL SCAN TOOL, AND
READ DATA.
1) Turn ignition switch to OFF.
2) Connect Subaru Select Monitor or the OBD-II general
scan tool to data link connector.
3) Turn ignition switch to ON and Subaru Select Monitor or
OBD-II general scan tool switch to ON.
4) Start engine.
OBD0185
5) Read data on Subaru Select Monitor or OBD-II general
scan tool.
Subaru Select Monitor
Designate mode using function key.
Function mode: F10
F10: Throttle position sensor output signal is indicated.
: Is the voltage less than 0.1 V?
: Go to step 2.
: Go to next.
: Is the voltage more than 4.9 V?
: Go to step 4.
: 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. Check
and repair the following connectors.
Throttle position sensor connector.
ECM connector
Coupling connector (B21)
OBD-II general scan tool
For detailed operation procedures, refer to the OBD-II Gen-
eral Scan Tool Instruction Manual.
163
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostics Chart with Trouble Code
Page 1496 of 2248
![SUBARU LEGACY 1995 Service Owners Guide 1.Check any other DTC (besides DTC P0740) on
display.
2.Check duty solenoid B circuit. <Ref. to“3-2
[T7B0]”.>
3.Check throttle position sensor circuit. <Ref. to
“3-2 [T7L0]”.>
4.Check vehicle](/img/17/57432/w960_57432-1495.png "SUBARU LEGACY 1995 Service Owners Guide 1.Check any other DTC (besides DTC P0740) on
display.
2.Check duty solenoid B circuit. <Ref. to“3-2
[T7B0]”.>
3.Check throttle position sensor circuit. <Ref. to
“3-2 [T7L0]”.>
4.Check vehicle")
1.Check any other DTC (besides DTC P0740) on
display.
2.Check duty solenoid B circuit.
3.Check throttle position sensor circuit.
4.Check vehicle speed sensor 1 circuit.
5.Check vehicle speed sensor 2 circuit.
6.Check engine speed input circuit.
7.Check inhibitor switch circuit.
8.Check brake light switch circuit.
9.Check ATF temperature sensor circuit.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
290
2-7ON-BOARD DIAGNOSTICS II SYSTEM
11. Diagnostics Chart with Trouble Code
Page 1557 of 2248
G3M0717
3. OPERATION OF SHIFT SELECTOR LEVER
WARNING:
Stop the engine while checking operation of selector
lever.
1) Check that selector lever does not move from“N”to“R”
without pushing the button.
2) Check that selector lever does not move from“R”to“P”
without pushing the button.
3) Check that selector lever does not move from“P”to“R”
without pushing the button.
4) Check that selector lever does not move from“3”to“2”
without pushing the button.
3. Electrical Components Location
1. SENSOR AND CONTROL MODULE
B3M0178B
1Throttle position sensor
2Dropping resistor
3Vehicle speed sensor 2
4Inhibitor switch
5ECM
6Vehicle speed sensor 1 (AWD)
7Vehicle speed sensor 1 (FWD)
8TCM
9Data link connector (for Subaru select monitor only)
10Data link connector (for Subaru select monitor and OBD-II
general scan tool)
11Diagnosis connector
12Diagnosis terminal
13AT OIL TEMP indicator light
(AT diagnostic indicator light)
3
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
2. Pre-inspection - 3. Electrical Components Location
Page 1558 of 2248
G3M0717
3. OPERATION OF SHIFT SELECTOR LEVER
WARNING:
Stop the engine while checking operation of selector
lever.
1) Check that selector lever does not move from“N”to“R”
without pushing the button.
2) Check that selector lever does not move from“R”to“P”
without pushing the button.
3) Check that selector lever does not move from“P”to“R”
without pushing the button.
4) Check that selector lever does not move from“3”to“2”
without pushing the button.
3. Electrical Components Location
1. SENSOR AND CONTROL MODULE
B3M0178B
1Throttle position sensor
2Dropping resistor
3Vehicle speed sensor 2
4Inhibitor switch
5ECM
6Vehicle speed sensor 1 (AWD)
7Vehicle speed sensor 1 (FWD)
8TCM
9Data link connector (for Subaru select monitor only)
10Data link connector (for Subaru select monitor and OBD-II
general scan tool)
11Diagnosis connector
12Diagnosis terminal
13AT OIL TEMP indicator light
(AT diagnostic indicator light)
3
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
2. Pre-inspection - 3. Electrical Components Location
Page 1576 of 2248
OBD0607A
4. CHECK OUTPUT SIGNAL EMITTED FROM TCM.
1) Connect connectors to TCM and transmission.
2) Lift-up the vehicle or set the vehicle on free roller.
CAUTION:
On AWD models, raise all wheels off floor.
3) Start and warm-up the engine and transmission.
4) Push the TCS OFF switch to ON. (With TCS models)
5) Move selector lever to“D”and slowly increase vehicle
speed to 75 km/h (47 MPH).
6) Measure voltage between TCM connector terminals.
Connector & terminal / Specified voltage:
(B55) No. 5—No. 10 / 8.5 V, or more (when
wheels are locked-up.)
OBD0607A
7) Return the engine to idling speed and move selector
lever to“N”.
8) Measure voltage between TCM connector terminals.
Connector & terminal / Specified voltage:
(B55) No. 5—No. 10 / 0.5 V, or less
NOTE:
The speed difference between front and rear wheels may
light either the ABS or the ABS/TCS warning light, but this
indicates no malfunctions. When AT control diagnosis is
finished, perform the ABS or the ABS/TCS memory clear-
ance procedure of self-diagnosis system.
OBD0145A
Using Subaru select monitor:
(1) Connect connectors to TCM and transmission.
(2) Lift-up the vehicle or set the vehicle on free roller.
CAUTION:
On AWD models, raise all wheels off floor.
(3) Turn ignition switch to OFF.
(4) Connect the Subaru select monitor to data link con-
nector.
(5) Turn ignition switch to ON and Subaru select moni-
tor switch to ON.
21
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
7. Diagnostic Chart with Trouble Code
Page 1579 of 2248
OBD0455A
4) Measure resistance of harness connector between
TCM and body to make sure that circuit does not short.
Connector & terminal / Specified resistance:
(B55) No. 15—Body/1MΩ, or more
(B55) No. 10—Body/1MΩ, or more
G3M0109
2. CHECK SHIFT SOLENOID 3’s GROUND LINE.
Measure resistance between transmission connector
receptacle and transmission case.
Connector & terminal / Specified resistance:
(T4) No. 4—Transmission / 1Ω, or less
G3M0117
3. CHECK SHIFT SOLENOID 3.
Measure resistance between transmission connector
receptacle’s terminals.
Connector & terminal / Specified resistance:
(T4) No. 1—No.4/20—32Ω
B3M0381A
4. CHECK OUTPUT SIGNAL EMITTED FROM TCM.
1) Connect connectors to TCM and transmission.
2) Lift-up or raise the vehicle and support with safety
stands.
CAUTION:
On AWD models, raise all wheels off ground.
3) Start and warm-up the engine and transmission.
4) Idle the engine.
5) Move selector lever to“D”.
6) Measure voltage between TCM connector terminals.
Connector & terminal / Specified voltage:
(B55) No. 15—No. 10 / 9 V, or more
NOTE:
The speed difference between front and rear wheels may
light either the ABS or the ABS/TCS warning light, but this
indicates no malfunctions. When AT control diagnosis is
finished, perform the ABS or the ABS/TCS memory clear-
ance procedure of self-diagnosis system.
24
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
7. Diagnostic Chart with Trouble Code
Page 1581 of 2248
OBD0447A
4) Measure resistance of harness connector between
TCM and body to make sure that circuit does not short.
Connector & terminal / Specified resistance:
(B55) No. 13—Body/1MΩ, or more
(B55) No. 10—Body/1MΩ, or more
G3M0109
2. CHECK SHIFT SOLENOID 2’s GROUND LINE.
Measure resistance between transmission connector
receptacle and transmission case.
Connector & terminal / Specified resistance:
(T4) No. 4—Transmission / 1Ω, or less
G3M0120
3. CHECK SHIFT SOLENOID 2.
Measure resistance between transmission connector
receptacle’s terminals.
Connector & terminal / Specified resistance:
(T4) No. 2—No.4/20—32Ω
OBD0445A
4. CHECK OUTPUT SIGNAL EMITTED FROM TCM.
1) Connect connectors to TCM and transmission.
2) Lift-up or raise the vehicle and support with safety
stands.
CAUTION:
On AWD models, raise all wheels off ground.
3) Start and warm-up the engine and transmission.
4) Idle the engine.
5) Move selector lever to“D”.
6) Measure voltage between TCM connector terminals.
Connector & terminal / Specified voltage:
(B55) No. 13—No. 10 / 9 V, or more
NOTE:
The speed difference between front and rear wheels may
light either the ABS or the ABS/TCS warning light, but this
indicates no malfunctions. When AT control diagnosis is
finished, perform the ABS or the ABS/TCS memory clear-
ance procedure of self-diagnosis system.
26
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
7. Diagnostic Chart with Trouble Code
Page 1583 of 2248
OBD0439A
4) Measure resistance of harness connector between
TCM and body to make sure that circuit does not short.
Connector & terminal / Specified resistance:
(B55) No. 14—Body/1MΩ, or more
(B55) No. 10—Body/1MΩ, or more
G3M0109
2. CHECK SHIFT SOLENOID 1’s GROUND LINE.
Measure resistance between transmission connector
receptacle and transmission case.
Connector & terminal / Specified resistance:
(T4) No. 4—Transmission / 1Ω, or less
G3M0123
3. CHECK SHIFT SOLENOID 1.
Measure resistance between transmission connector
receptacle’s terminals.
Connector & terminal / Specified resistance:
(T4) No. 3—No.4/20—32Ω
OBD0437A
4. CHECK OUTPUT SIGNAL EMITTED FROM TCM.
1) Connect connectors to TCM and transmission.
2) Lift-up or raise the vehicle and support with safety
stands.
CAUTION:
On AWD models, raise all wheels off ground.
3) Start and warm-up the engine and transmission.
4) Idle the engine.
5) Move selector lever to“D”.
6) Measure voltage between TCM connector terminals.
Connector & terminal / Specified voltage:
(B55) No. 14—No. 10 / 9 V, or more
NOTE:
The speed difference between front and rear wheels may
light either the ABS or the ABS/TCS warning light, but this
indicates no malfunctions. When AT control diagnosis is
finished, perform the ABS or the ABS/TCS memory clear-
ance procedure of self-diagnosis system.
28
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
7. Diagnostic Chart with Trouble Code