Page 1179 of 2453

EN(H6DO)(diag)-18
Engine Control Module (ECM) I/O Signal
ENGINE (DIAGNOSTICS)
Manifold absolute pressure sen-
sorB134 6 3.5 — 4.8 1.1 — 1.9 —
Air flow sensor
Signal B135 26 0.74 0.3 — 4.5 —
Shield B135 35 0 0 —
Ground B135 34 0 0 —
Intake air temperature sensor B135 18 3.15 — 3.33 3.15 — 3.33Intake air tempera-
ture 25°C (75°F)
Fr o nt ox yg e n ( A / F)
sensor RH
Signal (+) B135 9 2.8 — 3.2 2.8 — 3.2 —
Signal (–) B135 8 2.4 — 2.7 2.4 — 2.7 —
Shield B135 1 0 0 —
Fr o nt ox yg e n ( A / F)
sensor heater RH
Signal 1 B136 3 12 — 14 — Waveform
Signal 2 B136 2 12 — 14 — Waveform
Fr o nt ox yg e n ( A / F)
sensor LH
Signal (+) B135 11 2.8 — 3.2 2.8 — 3.2 —
Signal (–) B135 10 2.4 — 2.7 2.4 — 2.7 —
Shield B135 1 0 0 —
Fr o nt ox yg e n ( A / F)
sensor heater LH
Signal 1 B135 7 12 — 14 — Waveform
Signal 2 B135 6 12 — 14 — Waveform
Rear oxygen sen-
sor RH
Signal B135 4 0 0 — 0.9 —
Shield B135 1 0 0 —
Rear oxygen sensor heater RH
signalB136 4 12 — 14 — Waveform
Rear oxygen sen-
sor LH
Signal B135 15 0 0 — 0.9 —
Shield B135 1 0 0 —
Rear oxygen sensor heater LH
signalB136 5 12 — 14 — Waveform
Immobilizer communication 1 B136 26 10 10 —
Immobilizer communication 2 B136 34 10 10 —
Fuel pump control
unit
Diagnosis
signalB135 33 10 — 13 13 — 14 —
Control B136 12 0 0 or 5 —
Brake switch 1 B135 20
When brake pedal is
depressed: 0
When brake pedal is
released: 10 — 13
When brake pedal is
depressed: 0
When brake pedal is
released: 13 — 14
—
Brake switch 2 B135 28
When brake pedal is
depressed: 10 — 13
When brake pedal is
released: 0
When brake pedal is
depressed: 13 — 14
When brake pedal is
released: 0
—
Cruise control command switch B135 24
When operating
nothing: 3.5 — 4.5
When operating
RES/ACC: 2.5 — 3.5
When operating SET/
COAST: 0.5 — 1.5
When operating
CANCEL: 0 — 0.5
When operating
nothing: 3.5 — 4.5
When operating
RES/ACC: 2.5 — 3.5
When operating SET/
COAST: 0.5 — 1.5
When operating
CANCEL: 0 — 0.5
—
Cruise control main switch B135 12ON: 0
OFF: 5
ON: 0
OFF: 5—
Oil flow control sole-
noid valve RH
Signal (+) B137 17 0 0.6 —
Signal (–) B137 16 0 0 —
Oil flow control sole-
noid valve LH
Signal (+) B137 15 0 0.6 —
Signal (–) B137 14 0 0 —
DescriptionConnector
No.
Te r m i n a l
No.
Signal (V)
ReferenceIgnition SW ON
(engine OFF)
Engine ON
(idling)
Page 1180 of 2453

EN(H6DO)(diag)-19
Engine Control Module (ECM) I/O Signal
ENGINE (DIAGNOSTICS)
Oil switching sole-
noid valve RH
Signal (+) B137 25 0 1.9 —
Signal (–) B137 24 0 0 —
Oil switching sole-
noid valve LH
Signal (+) B137 31 0 1.9 —
Signal (–) B137 30 0 0 —
Oil temperature sensor signal B134 23 1.0 — 1.4 1.0 — 1.4After engine is
warmed-up.
Va r i a b l e va l v e l i f t d i a g n o s i s o i l
pressure switch RHB134 31 0 0 —
Va r i a b l e va l v e l i f t d i a g n o s i s o i l
pressure switch LHB134 32 0 0 —
Generator control B136 10 0 — 6.5 0 — 6.5 —
SSM communication B136 161 or less ←→ 4 or
more
1 or less ←→ 4 or
more—
Fuel tank pressure sensor B135 32 2.3 2.7 —
Drain valve B136 17ON: 1 or less
OFF: 10 — 13
ON: 1 or less
OFF: 13 — 14—
Fuel temperature sensor B135 17 2.5 — 3.8 2.5 — 3.8Ambient tempera-
ture: 25°C (75°F)
CAN communication line (+) B136 27More than 2.0 ←→
Less than 4.5
More than 2.0 ←→
Less than 4.5—
CAN communication (–) B136 35More than 0.5 ←→
Less than 3.0
More than 0.5 ←→
Less than 3.0—
Ground (injector system 1) B137 26 0 0 —
Ground (injector system 2) B137 6 0 0 —
Ground (engine 1) B134 5 0 0 —
Ground (engine 2) B137 7 0 0 —
Ground (engine 3) B137 2 0 0 —
Ground (engine 4) B137 1 0 0 —
Ground (engine 5) B137 3 0 0 —
Ground (engine 6) B134 3 0 0 —
Ground (body) B136 6 0 0 —
DescriptionConnector
No.
Te r m i n a l
No.
Signal (V)
ReferenceIgnition SW ON
(engine OFF)
Engine ON
(idling)
Page 1181 of 2453
EN(H6DO)(diag)-20
Engine Condition Data
ENGINE (DIAGNOSTICS)
6. Engine Condition Data
A: ELECTRICAL SPECIFICATION
Measuring condition:
•After engine is warmed-up.
•Gear position is in “N” or “P” range.
•Turn the A/C to OFF.
•Turn all the accessory switches to OFF.
Description Specification
Engine load17.9 — 38.8(%): Idling
16.6 — 33.7(%): 2,500 rpm racing
Page 1182 of 2453
EN(H6DO)(diag)-21
Data Link Connector
ENGINE (DIAGNOSTICS)
7. Data Link Connector
A: NOTE
This connector is used for Subaru Select Monitor.
CAUTION:
Do not connect any scan tools except Subaru Select Monitor or general scan tool because the circuit
for Subaru Select Monitor may be damaged.
EN-00037
12345 768
910111213 1514 16
Te r m i n a l N o . D e s c r i p t i o n Te r m i n a l N o . D e s c r i p t i o n
1Power supply 9Empty
2Empty 10Subaru Select Monitor signal
3Empty 11Empty
4Empty 12Ground
5Empty 13Ground
6Empty 14Empty
7Empty 15Empty
8Empty 16Empty
Page 1183 of 2453
EN(H6DO)(diag)-22
General Scan Tool
ENGINE (DIAGNOSTICS)
8. General Scan Tool
A: OPERATION
1. HOW TO USE GENERAL SCAN TOOL
1) Prepare a scan tool (general scan tool) required
by SAE J1978.
2) Open the cover and connect the general scan
tool to data link connector located in the lower por-
tion of the instrument panel (on the driver’s side).
3) Using the general scan tool, call up DTC and
freeze frame data.
General scan tool functions consist of:
(1) MODE $01: Current powertrain diagnostic
data
(2) MODE $02: Powertrain freeze frame data
(3) MODE $03: Emission-related powertrain
DTC
(4) MODE $04: Clear/Reset emission-related
diagnostic information
Read out the data according to repair procedures.
(For detailed operation procedure, refer to the gen-
eral scan tool instruction manual.)
NOTE:
For details concerning DTC, refer to “List of Diag-
nostic Trouble Code (DTC)”.
Trouble Code (DTC).>
EN-03693
Page 1184 of 2453

EN(H6DO)(diag)-23
General Scan Tool
ENGINE (DIAGNOSTICS)
2. MODE $01 (CURRENT POWERTRAIN DIAGNOSTIC DATA)
Refer to data denoting the current operating condition of analog input/output, digital input/output or the pow-
ertrain system.
A list of the support data and PID (Parameter Identification) codes are shown in the following table.
NOTE:
Refer to general scan tool manufacturer’s operation manual to access generic OBD-II PIDs (MODE $01).
PID Data Unit of measure
01 Number of emission-related powertrain DTC and malfunction indicator light status ON/OFF
03 Fuel system control status—
04 Calculated engine load value%
05 Engine coolant temperature°C
06 Short term fuel trim (Bank 1)%
07 Long term fuel trim (Bank 1)%
08 Short term fuel trim (Bank 2)%
09 Long term fuel trim (Bank 2)%
0B Intake manifold absolute pressure kPa
0C Engine revolutionrpm
0D Vehicle speedkm/h
0E Ignition timing advance°
0F Intake air temperature°C
10 Air flow rate of manifold absolute pressure sensor g/sec
11 Throttle valve opening angle%
13 Check whether oxygen sensor is installed. —
15 Oxygen sensor output voltage (Bank 1 Sensor 2) V
15 Oxygen sensor compensation (Bank 1 Sensor 2) %
19 Oxygen sensor output voltage (Bank 2 Sensor 2) V
1C On-board diagnostic system—
24 Oxygen sensor output voltage and short term fuel trim associated with oxygen sensor (bank 1) V and %
28 Oxygen sensor output voltage and short term fuel trim associated with oxygen sensor (bank 2) V and %
34 A/F sensor lambda value (Bank 1 Sensor 1) —
34 A/F sensor current value (Bank 1 Sensor 1) mA
38 A/F sensor lambda value (Bank 2 Sensor 1) —
38 A/F sensor current value (Bank 2 Sensor 1) mA
Page 1185 of 2453

EN(H6DO)(diag)-24
General Scan Tool
ENGINE (DIAGNOSTICS)
3. MODE $02 (POWERTRAIN FREEZE FRAME DATA)
Refer to data denoting the operating condition when trouble is detected by on-board diagnosis system.
A list of the support data and PID (Parameter Identification) codes are shown in the following table.
NOTE:
Refer to general scan tool manufacturer’s operation manual to access freeze frame data (MODE $02).
4. MODE $03 (EMISSION-RELATED POWERTRAIN DTC)
Refer to “List of Diagnostic Trouble Code (DTC)” for information about data denoting emission-related pow-
ertrain DTC.
5. MODE $04 (CLEAR/RESET EMISSION-RELATED DIAGNOSTIC INFORMATION)
Refer to the mode used to clear or reset emission-related diagnostic information (OBD-II trouble diagnostic
information).
NOTE:
Refer to general scan tool manufacturer's operation manual to clear or reset emission-related diagnostic in-
formation (MODE $04).
PID Data Unit of measure
02 DTC that caused CARB required freeze frame data storage —
03 Fuel system control status—
04 Calculated engine load value%
05 Engine coolant temperature°C
06 Short term fuel trim (Bank 1)%
07 Long term fuel trim (Bank 1)%
08 Short term fuel trim (Bank 2)%
09 Long term fuel trim (Bank 2)%
0B Intake manifold absolute pressure kPa
0C Engine speedrpm
0D Vehicle speedkm/h
0E Ignition timing advance°
0F Intake air temperature°C
10 Air flow rate of manifold absolute pressure sensor g/sec
11 Throttle valve opening angle%
15 Oxygen sensor output voltage (Bank 1 Sensor 2) V
15 Oxygen sensor compensation (Bank 1 Sensor 2) %
16 Oxygen sensor output voltage (Bank 2 Sensor 2) V
16 Oxygen sensor compensation (Bank 2 Sensor 2) %
1C On-board diagnostic system—
Page 1186 of 2453

EN(H6DO)(diag)-25
General Scan Tool
ENGINE (DIAGNOSTICS)
6. MODE $06
Refer to the test value of troubleshooting and data of test specification on the support data bit sequence ta-
ble. A list of the support data is shown in the following table.
7. MODE $07
Refer to the data of DTC (pending code) for troubleshooting result about emission in the first time.
8. MODE $09
Refer to the data of vehicle specification (VIN, calibration ID, diagnosis frequency, etc.).
TID CID Test value & Test specification
$81 $01 Catalyst system efficiency
$83
$01 Evaporative emission control system 0.04 inch leak
$02 Evaporative emission control system 0.04 inch leak
$03 Evaporative emission control system 0.04 inch leak
$04 Evaporative emission control system 0.04 inch leak
$05 Evaporative emission control system 0.02 inch leak
$06 Evaporative emission control system 0.02 inch leak
$84 $01 A/F sensor circuit slow response (Bank 1 Sensor 1)
$85$01 O2 sensor circuit slow response (Bank 1 Sensor 2) (rich → lean)
$02 O2 sensor circuit slow response (Bank 1 Sensor 2) (lean → rich)
$87 $01 A/F sensor circuit slow response (Bank 2 Sensor 1)
$88$01 O2 sensor circuit slow response (Bank 2 Sensor 2) (rich → lean)
$02 O2 sensor circuit slow response (Bank 2 Sensor 2) (lean → rich)
$41$01 O2 sensor circuit no activity detected (Bank1 Sensor2)
$02 O2 sensor circuit no activity detected (Bank1 Sensor2)
$43$01 O2 sensor circuit no activity detected (Bank2 Sensor2)
$02 O2 sensor circuit no activity detected (Bank2 Sensor2)