SUBARU LEGACY 1997 Service Repair Manual
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B: AUTOMATIC TRANSMISSION
1. ELECTRONIC-HYDRAULIC CONTROL SYSTEM
The electronic-hydraulic control system consists of various
sensors and switches, a transmission control module
(TCM) and the hydraulic controller including solenoid
valves. The system controls the transmission proper
including shift control, lock-up control, overrunning clutch
control, line pressure control and shift timing control. It also
controls the AWD transfer clutch. In other words, the sys-
tem detects various operating conditions from various input
signals and sends output signals to shift solenoids 1, 2 and
3 and duty solenoids A, B and C (a total of six solenoids).
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2-7ON-BOARD DIAGNOSTICS II SYSTEM
1. General
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2. SCHEMATIC
B2M0469A
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2-7ON-BOARD DIAGNOSTICS II SYSTEM
1. General
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2. Electrical Components Location
A: ENGINE
1. MODULE
OBD0003E
B2M0430H
1Engine control module (ECM)
2Data link connector (for Subaru select monitor only)
3Data link connector (for Subaru select monitor and OBD-II
general scan tool)
4Test mode connector
5CHECK ENGINE malfunction indicator lamp (MIL)
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2-7ON-BOARD DIAGNOSTICS II SYSTEM
2. Electrical Components Location
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OBD0004BB2M0431B
OBD0005GB2M0432C
OBD0006EB2M0433C
B2M0470A
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2-7ON-BOARD DIAGNOSTICS II SYSTEM
2. Electrical Components Location
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2. SENSOR
B2M1169D
1Pressure sensor
2Mass air flow sensor
3Engine coolant temperature sensor
4Throttle position sensor
5Knock sensor
6Camshaft position sensor
7Crankshaft position sensor
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2-7ON-BOARD DIAGNOSTICS II SYSTEM
2. Electrical Components Location
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B2M0776AB2M1034A
B2M1690AB2M1035A
B2M1691AOBD0015A
B2M0213B
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2-7ON-BOARD DIAGNOSTICS II SYSTEM
2. Electrical Components Location
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B2M0471A
B2M0472A
8Front oxygen sensor
9Rear oxygen sensor (Except 2200 cc California spec.
vehicles)
10Rear oxygen sensor (2200 cc California spec. vehicles)
11Front catalytic converter
12Rear catalytic converter
OBD0018AOBD0019E
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2-7ON-BOARD DIAGNOSTICS II SYSTEM
2. Electrical Components Location
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B2M0473COBD0524C
OBD0525C
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2-7ON-BOARD DIAGNOSTICS II SYSTEM
2. Electrical Components Location
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OBD0003F
B2M0430F
1Fuel level sensor
2Fuel temperature sensor (2200 cc AWD except Taiwan spec.
vehicles)
3Fuel tank pressure sensor (2200 cc AWD except Taiwan
spec. vehicles)
4Fuel sub level sensor
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2-7ON-BOARD DIAGNOSTICS II SYSTEM
2. Electrical Components Location
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B2M0921AB2M0922A
B2M0946A
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2-7ON-BOARD DIAGNOSTICS II SYSTEM
2. Electrical Components Location