Page 1777 of 2890

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 1778 of 2890
5. SCHEMATIC (RHD MODEL)
B2M0828A
10
2-7ON-BOARD DIAGNOSTICS II SYSTEM
1. General
Page 1779 of 2890

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 (Except California model)
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 2
41Data link connector (For Subaru select monitor)
42Data link connector (For Subaru select monitor and OBD-II
general scan tool)
43Two way valve
44Rear oxygen sensor (California model only)
45Filter
11
2-7ON-BOARD DIAGNOSTICS II SYSTEM
1. General
Page 1780 of 2890
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).
12
2-7ON-BOARD DIAGNOSTICS II SYSTEM
1. General
Page 1781 of 2890
2. SCHEMATIC
B2M0469A
13
2-7ON-BOARD DIAGNOSTICS II SYSTEM
1. General
Page 1782 of 2890
2. Electrical Components Location
A: ENGINE
1. MODULE
OBD0003A
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)
OBD0004AOBD0005D
OBD0006BB2M0470A
14
2-7ON-BOARD DIAGNOSTICS II SYSTEM
2. Electrical Components Location
Page 1783 of 2890
2. SENSOR
OBD0009A
1Pressure sensor
2Mass air flow sensor
3Engine coolant temperature sensor
4Throttle position sensor
5Knock sensor
6Camshaft position sensor
7Crankshaft position sensor
B2M0776AOBD0011A
15
2-7ON-BOARD DIAGNOSTICS II SYSTEM
2. Electrical Components Location
Page 1784 of 2890
OBD0012AOBD0013A
OBD0014AOBD0015A
B2M0213B
16
2-7ON-BOARD DIAGNOSTICS II SYSTEM
2. Electrical Components Location