SUBARU LEGACY 1997 Service Repair Manual

B3M0639
C: MODE F00—MODE DISPLAY—
SPECIFIED DATA:
Data at the left should be indicated.
Probable cause (if outside“specified data”)
1. Communication failure
(No communication method can be confirmed
with power ON.)
(1)Check loose or poor connectors, or
shortcircuit.
(2) Check type of cartridge.
2. Vehicle types cannot be identified (due to
communication failure).Check improper cartridge.
Replace with proper one.
G3M0724
D: MODE F01—BATTERY VOLTAGE (VB)—
CONDITION:

Ignition switch ON

Engine idling after warm-up
SPECIFIED DATA:
VB: 10—16 V
1. BatteryCheck battery voltage and specific gravity of
electrolyte.
2. Charging system(1)Measure regulating voltage under no loads.
(2) Check generator (as a single unit).
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3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
8. Diagnostic Chart with Select Monitor

G3M0725
E: MODE F02
—VEHICLE SPEED SENSOR 1 (VSP1)—
F03 = vehicle speed (VSP1):
to be indicated in“km/h”.
CONDITION:
Raise vehicle off ground and operate at constant speed.
SPECIFIED DATA:
Compare speedometer with monitor indications.
Probable cause (if outside“specified data”)
1. Vehicle speed sensor 1
Check performance characteristics of vehicle speed
sensor 1.
OK
Check TCM and replace if necessary.
G3M0726
F: MODE F04
—VEHICLE SPEED SENSOR 2 (VSP2)—
F05 = vehicle speed (VSP2):
to be indicated in“km/h”.
CONDITION:
Raise vehicle off ground and operate at constant speed.
SPECIFIED DATA:
Compare speedometer with monitor indications.
Probable cause (if outside“specified data”)
1. Vehicle speed sensor 2
Check performance characteristics of vehicle speed
sensor 2.
OK
Check TCM and replace if necessary.


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3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
8. Diagnostic Chart with Select Monitor

G3M0727
G: MODE F06—ENGINE SPEED (EREV)—
CONDITION:
Measure with engine operating at constant speed.
SPECIFIED DATA:
Same as tachometer reading (in combination meter)
Probable cause (if outside“specified data”)
1. Conduct diagnostics in relation to MPFI
system for engine speed.
OK
Check TCM and replace if necessary.
OBD0386
H: MODE F07
—ATF TEMPERATURE SENSOR (ATFT)—
F08 = ATF temperature (ATFT):
to be indicated in“deg C”.
CONDITION:

Low ATF temperature (before engine/vehicle starts.)

High ATF temperature (after driving vehicle for warm-
up.)
SPECIFIED DATA:

Ambient temperature: ±50°F (±10°C)
(Low ATF temperature)

ATF temperature: 158—230°F (70—11 0°C)
(High ATF temperature)

Open harness: 176 deg F (80 deg C)

Shorted harness: 320 deg F (160 deg C)
Probable cause (if outside“specified data”)
1. ATF temperature sensor
Check performance characteristics of ATF
temperature sensor.
OK
Check TCM and replace if necessary.

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3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
8. Diagnostic Chart with Select Monitor

B3M0383
I: MODE F09
—THROTTLE POSITION SENSOR (THV)—
CONDITION:

Ignition switch ON (with engine OFF)

Measure voltage while operating throttle valve from a
fully closed position to a fully open position.
SPECIFIED DATA:

Fully closed position: 0.5±0.2 V

Fully open position: 4.6±0.3 V

From fully closed to fully open position:
Voltage must smoothly decrease.

Open harness: 5.0±0.3 V

Shorted harness: 0.00 V
Probable cause (if outside“specified data”)
1. Throttle position sensor
Check performance characteristics of throttle
position sensor.
OK
Check TCM and replace if necessary.
G3M0730
J: MODE F10—GEAR POSITION (GEAR)—
CONDITION:
Check while driving vehicle (after warm-up).
SPECIFIED DATA:
Gear position (Refer to shift performance characteristics
chart.)
Probable cause (item outside“specified data”)
1. Shift solenoid 1
Check performance characteristics of shift solenoid
1.
OK
2. Shift solenoid 2
Check performance characteristics of shift solenoid
2.
OK
3. Shift solenoid 3
Check performance characteristics of shift solenoid
3.
OK
Check TCM and replace as necessary.




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3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
8. Diagnostic Chart with Select Monitor

G3M0731
K: MODE F11
—LINE PRESSURE DUTY (PLDTY)—
CONDITION:

After sufficient warm-up

Ignition ON (engine OFF)

N range
SPECIFIED DATA:

Throttle fully closed: 100%

Throttle fully open : 15% or less
Probable cause (if outside“specified data”)
1. Throttle position sensor
Check in F09 mode.
OK
2. Vehicle speed sensor 1
Check in F02 mode.
OK
3. Vehicle speed sensor 2
Check in F04 mode.
OK
4. Engine speed
Check in F06 mode.
OK
5. ATF temperature sensor
Check in F07 mode.
OK
6. Inhibitor switch
Check for operation.
OK
Check TCM and replace if necessary.






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3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
8. Diagnostic Chart with Select Monitor

G3M0732
L: MODE F12—LOCK-UP DUTY (LUDTY)—
CONDITION:

Idling (after sufficient warm-up) with lock-up system
released.

Driving at 75 km/h (47 MPH) (after sufficient warm-up)
with lock-up system applied.
SPECIFIED DATA:

Lock-up system released: 5%

Lock-up system applied: 95%
Probable cause (if outside“specified data”)
1. Throttle position sensor
Check in F09 mode.
OK
2. Vehicle speed sensor 1
Check in F02 mode.
OK
3. Vehicle speed sensor 2
Check in F04 mode.
OK
4. Engine speed
Check in F06 mode.
OK
5. Inhibitor switch
Check for operation.
OK
Check TCM and replace if necessary.





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3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
8. Diagnostic Chart with Select Monitor

G3M0733
M: MODE F13—AWD DUTY (4WDTY)—
CONDITION:

After sufficient warm-up

Ignition switch ON (engine OFF)

FWD mode

AWD mode, D range, full throttle
SPECIFIED DATA:

95% (FWD mode)

25%, max. (vehicle speed 0 m/h) (AWD mode)
Probable cause (if outside“specified data”)
1. Throttle position sensor
Check in F09 mode.
OK
2. Vehicle speed sensor 1
Check in F02 mode.
OK
3. Vehicle speed sensor 2
Check in F04 mode.
OK
4. ATF temperature sensor
Check in F07 mode.
OK
5. Inhibitor switch
Check for operation.
OK
6. ABS signal
Check ABS system for operation.
OK
Check TCM and replace if necessary.






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3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
8. Diagnostic Chart with Select Monitor

B3M0259
N: MODE F14
—THROTTLE POSITION SENSOR POWER
SUPPLY (THVCC)—
CONDITION:
Ignition switch ON (engine OFF)
SPECIFIED DATA:
5.12±0.1 V
Probable cause (Item outside“specified data”)
1. Throttle position sensor power supply
Check throttle sensor line.
OK
Check TCM and replace if necessary.
B3M0370
O: MODE F15
—MASS AIR FLOW SIGNAL (AFM)—
CONDITION:

Ignition switch ON (engine ON)

N range

Idling
SPECIFIED DATA:
Engine warm-up: 0.5—1.22 V
Probable cause (if outside“specified data”)
1. Mass air flow signal
Check performance characteristics of mass air flow
signal.
OK
Check TCM and replace if necessary.


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3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
8. Diagnostic Chart with Select Monitor

DISPLAY
LED No. Signal name Symbol
1 FWD switch FF
2 Kick-down switch KD
3——
4——
5 Brake BR
6 ABS switch AB
7 Cruise control set CR
8 Power switch PW
9——
10——
FF KD—— ——BR
AB CR PW—— ——
1
2345
678910
P: MODE FA0
—SWITCH 1 (SW1)—
Reference values

Lights up when the fuse is installed in FWD switch (No. 1).

Light up when the brake pedal is depressed (No. 5).

Light up when the ABS signal is entered (No. 6).

Lights up when the cruise control is set (No. 7).
NOTE:
LED Nos. 2 and 8 do not come on.
DISPLAY
LED No. Signal name Symbol
1 N/P range switch NP
2 R range switch RR
3 D range switch RD
4 3 range switch R3
5 2 range switch R2
6 1 range switch R1
7 Diagnosis switch SS
8——
9——
10——
NP RR RD R3 R2
R1 SS—— —— ——
1
2345
678910
Q: MODE FA1
—SWITCH 2 (SW2)—
Reference values

Lights up when the N or P range is selected (No. 1).

Lights up when the R range is selected (No. 2).

Lights up when the D range is selected (No. 3).

Lights up when the 3 range is selected (No. 4).

Lights up when the 2 range is selected (No. 5).

Lights up when the 1 range is selected (No. 6).

Lights up when the diagnosis switch is connected
(No. 7).
NOTE:
If each LED does not illuminate in the above conditions,
inhibitor switch malfunction may occur. Perform diagnostics
on inhibitor switch.
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3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
8. Diagnostic Chart with Select Monitor

R: MODE FA1
—LED No. 7, DIAGNOSIS SWITCH—
DIAGNOSIS:

LED does not come on when diagnosis switch is ON.

Diagnosis switch circuit is open or shorted.
Probable cause (if outside“specified data”)
1. Check harness connector between TCM and
diagnosis switch.
OK
Not OK
Repair or replace harness connectors.
2. Check input signal for TCM.
OK
Not OK
Repair TCM connector terminal poor contact.
3. Check diagnosis switch ground line.
OK
Not OK
Repair or replace harness connector.
Repair diagnosis switch connector terminal poor
contact.
,Not OK,Repair TCM and diagnosis switch
connector terminal poor contact.
B3M0359



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3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
8. Diagnostic Chart with Select Monitor