1997 SUBARU LEGACY Service Repair Manual

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buttons steering oil pressure set clock spark plugs replace open gas tank

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Page 1857 of 3342

SUBARU LEGACY 1997 Service Repair Manual 3. SCHEMATIC (2200 cc AWD EXCEPT TAIWAN
SPEC. VEHICLES)
B2M0914A
6
2-7ON-BOARD DIAGNOSTICS II SYSTEM
1. General

3. SCHEMATIC (2200 cc AWD EXCEPT TAIWAN
SPEC. VEHICLES)
B2M0914A
6
2-7ON-BOARD DIAGNOSTICS II SYSTEM
1. General

Page 1858 of 3342

SUBARU LEGACY 1997 Service Repair Manual 1Engine control module (ECM)

2Ignition coil

3Ignitor

4Crankshaft position sensor

5Camshaft position sensor

6Throttle position sensor

7Fuel injectors

8Pressure regulator

9Engine coolan

1Engine control module (ECM)

2Ignition coil

3Ignitor

4Crankshaft position sensor

5Camshaft position sensor

6Throttle position sensor

7Fuel injectors

8Pressure regulator

9Engine coolant temperature sensor

10Mass air flow sensor

11Idle air control solenoid valve

12Purge control solenoid valve

13Fuel pump

14PCV valve

15Air cleaner

16Canister

17Main relay

18Fuel pump relay

19Fuel filter

20Front catalytic converter

21Rear catalytic converter

22EGR valve (AT vehicles only)

23EGR control solenoid valve (AT vehicles only)

24Radiator fan

25Radiator fan relay

26Pressure sources switching solenoid valve
27Front oxygen sensor

28Rear oxygen sensor (2200 cc Federal spec. vehicles)

29Pressure sensor

30A/C compressor (With A/C models)

31Inhibitor switch

32CHECK ENGINE malfunction indicator lamp (MIL)

33Tachometer

34A/C relay (With A/C models)

35A/C control module (With A/C models)

36Ignition switch

37Transmission control module (TCM)

38Vehicle speed sensor

39Data link connector (For Subaru select monitor)

40Data link connector (For Subaru select monitor and OBD-II
general scan tool)

41Rear oxygen sensor (2200 cc California spec. vehicles)

42Knock sensor

43Back-pressure transducer (AT vehicles only)

44Filter

45Fuel tank pressure sensor

46Pressure control solenoid valve

47Fuel temperature sensor

48Fuel level sensor

49Vent control solenoid valve

50Air filter
7
2-7ON-BOARD DIAGNOSTICS II SYSTEM
1. General

Page 1859 of 3342

4. SCHEMATIC (2500 cc MODEL)
B2M0710A
8
2-7ON-BOARD DIAGNOSTICS II SYSTEM
1. General

Page 1860 of 3342

1Engine control module (ECM)

2Ignition coil

3Ignitor

4Crankshaft position sensor

5Camshaft position sensor

6Throttle position sensor

7Fuel injectors

8Pressure regulator

9Engine coolant temperature sensor

10Mass air flow sensor

11Idle air control solenoid valve

12Purge control solenoid valve

13Fuel pump

14PCV valve

15Air cleaner

16Canister

17Main relay

18Fuel pump relay

19Fuel filter

20Front catalytic converter

21Rear catalytic converter

22EGR valve
23EGR control solenoid valve

24Radiator fan

25Radiator fan relay

26Pressure sources switching solenoid valve

27Knock sensor

28Back-pressure transducer

29Front oxygen sensor

30Rear oxygen sensor

31Pressure sensor

32A/C compressor

33Inhibitor switch

34CHECK ENGINE malfunction indicator lamp (MIL)

35Tachometer

36A/C relay

37A/C control module

38Ignition switch

39Transmission control module (TCM)

40Vehicle speed sensor

41Data link connector (Subaru select monitor)

42Data link connector (OBD-II general scan tool)

43Two way valve

44Filter
9
2-7ON-BOARD DIAGNOSTICS II SYSTEM
1. General

Page 1861 of 3342

SUBARU LEGACY 1997 Service Repair Manual 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

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).
10
2-7ON-BOARD DIAGNOSTICS II SYSTEM
1. General

Page 1862 of 3342

2. SCHEMATIC
B2M0469A
11
2-7ON-BOARD DIAGNOSTICS II SYSTEM
1. General

Page 1863 of 3342

SUBARU LEGACY 1997 Service Repair Manual 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

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)
12
2-7ON-BOARD DIAGNOSTICS II SYSTEM
2. Electrical Components Location

Page 1864 of 3342

SUBARU LEGACY 1997 Service Repair Manual OBD0004BB2M0431B
OBD0005GB2M0432C
OBD0006EB2M0433C
B2M0470A
13
2-7ON-BOARD DIAGNOSTICS II SYSTEM
2. Electrical Components Location

OBD0004BB2M0431B
OBD0005GB2M0432C
OBD0006EB2M0433C
B2M0470A
13
2-7ON-BOARD DIAGNOSTICS II SYSTEM
2. Electrical Components Location

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