2004 SUBARU FORESTER engine

EN(H4DOTC 2.5)-21
ENGINE (DIAGNOSTIC)
Engine Control Module (ECM) I/O Signal
Immobilizer input/output B137 191 or less ← →
4 or more1 or less ← →
4 or more—
Immobilizer input/output B137 271 or less ← →
4 or more1 or less ← →
4 or more—
Generator control B134 22 0 — 6.5 0 — 6.5 —DESCRIPTION Connector No. Terminal No.Signal (V)
NOTE
Ignition SW ON
(engine OFF)Engine ON
(Idling)

EN(H4DOTC 2.5)-22
ENGINE (DIAGNOSTIC)
Engine Condition Data
6. Engine Condition Data
A: ELECTRICAL SPECIFICATION
Measuring condition:
 After engine is warmed-up.
 Gear position is in neutral.
 Turn the A/C to OFF.
 Turn all accessory switches to OFF.
Remarks Specification
Engine load1.9 — 3.9 (%): Idling
6.7 — 14.6 (%): 2,500 rpm Racing

EN(H4DOTC 2.5)-23
ENGINE (DIAGNOSTIC)
Data Link Connector
7. Data Link Connector
A: NOTE
This connector is used both for OBD-II general scan tools and the Subaru Select Monitor.
CAUTION:
Do not connect any scan tools other than the OBD-II general scan tools and the Subaru Select Mon-
itor, because the circuit for the Subaru Select Monitor may be damaged.
EN-00037
12345 768
910111213 1514 16
Terminal No. Remarks Terminal No. Remarks
1Power supply 9Empty
2Empty 10Subaru Select Monitor/OBD-II general scan
tool signal
3 Empty 11 Empty
4 Empty 12 Ground
5 Empty 13 Ground
6 Line end check signal 1 14 Empty
7 Empty 15 Empty
8 Empty 16 Empty

EN(H4DOTC 2.5)-24
ENGINE (DIAGNOSTIC)
OBD-II General Scan Tool
8. OBD-II General Scan Tool
A: OPERATION
1. HOW TO USE OBD-II GENERAL SCAN
TOOL
1) Prepare a general scan tool (OBD-II general
scan tool) required by SAE J1978.
2) Open the cover and connect the OBD-II general
scan tool to the data link connector located in the
lower portion of the instrument panel (on the driv-
er’s side).
3) Using the OBD-II general scan tool, call up the
DTC and freeze frame data.
OBD-II 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 di-
agnostic trouble codes
(4) MODE $04: Clear/Reset emission-related
diagnostic information
(5) MODE $06: Request of on-board monitoring
test result for intermittent monitor system
(6) MODE $07: Request of on-board monitoring
test result for continuous monitor system
(7) MODE $09: Request of vehicle information
Read out data according to repair procedures. (For
detailed operation procedures, refer to the OBD-II
General Scan Tool Operation Manual.)
NOTE:
For details concerning DTCs, refer to the List of Di-
agnostic Trouble Code (DTC). EN(H4DOTC 2.5)-65, List of Diagnostic Trouble
Code (DTC).>
EN-02353

EN(H4DOTC 2.5)-25
ENGINE (DIAGNOSTIC)
OBD-II General Scan Tool
2. MODE $01 (CURRENT POWERTRAIN DIAGNOSTIC DATA)
Refers to data denoting the current operating condition of analog input/output, digital input/output and/or the
powertrain system.
A list of the support data and PID (Parameter Identification) codes are shown in the following table.
NOTE:
Refer to OBD-II general scan tool manufacturer’s instruction manual to access generic OBD-II PIDs (MODE
$01).
3. MODE $02 (POWERTRAIN FREEZE FRAME DATA)
Refers to data denoting the operating condition when trouble is sensed by the on-board diagnosis system.
A list of the support data and PID (Parameter Identification) codes are shown in the following table.
NOTE:
Refer to OBD-II general scan tool manufacturer’s instruction manual to access freeze frame data (MODE
$02).
PID Data Unit of measure
01Number of emission-related powertrain DTC, malfunction indicator light status and diagnosis
support information—
03 Fuel system control status—
04 Calculated engine load value%
05 Engine coolant temperature°C
06 Short term fuel trim%
07 Long term whole fuel trim%
0B Intake manifold absolute pressure kPa, mmHg
0C Engine revolutionrpm
0D Vehicle speedkm/h
0E Ignition timing advance°
0F Intake air temperature°C
10 Air flow rate of mass air flow sensor g/sec
11 Throttle valve absolute opening angle %
13 Check whether oxygen sensor is installed. —
15 Oxygen sensor output voltage and short term fuel trim associated with oxygen sensor V and %
1C Available OBD system—
24 A/F value and A/F sensor output voltage — and V
34 A/F value and A/F sensor current — and mA
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%
07 Long term whole fuel trim%
0B Intake manifold absolute pressure mmHg
0C Engine speedrpm
0D Vehicle speedkm/h
0E Ignition timing advance°
0F Intake air temperature°C
10 Air flow rate of mass air flow sensor g/sec
11 Throttle valve absolute opening angle %

EN(H4DOTC 2.5)-26
ENGINE (DIAGNOSTIC)
OBD-II General Scan Tool
4. MODE $03 (EMISSION-RELATED POWERTRAIN DIAGNOSTIC TROUBLE CODES)
Refer to “Read Diagnostic Trouble Code (DTC)” for information about data denoting emission-related pow-
ertrain diagnostic trouble codes.
5. MODE $04 (CLEAR/RESET EMISSION-RELATED DIAGNOSTIC INFORMATION)
Refers to the mode used to clear or reset emission-related diagnostic information (OBD-II trouble diagnostic
information).
NOTE:
Refer to OBD-II general scan tool manufacturer’s instruction manual to clear or reset emission-related diag-
nostic information (MODE $04).
6. MODE $07
Refers to the data of DTC (pending code) that for the first diagnosis result related emission.
7. MODE $09
Refer to the data of vehicle specifications (V.I.N., calibration ID and etc.).

EN(H4DOTC 2.5)-27
ENGINE (DIAGNOSTIC)
Subaru Select Monitor
9. Subaru Select Monitor
A: OPERATION
1. HOW TO USE SUBARU SELECT MONI-
TOR
1) Prepare the Subaru Select Monitor kit. EN(H4DOTC 2.5)-7, PREPARATION TOOL, Gen-
eral Description.>
2) Connect the diagnosis cable to Subaru Select
Monitor.
3) Insert the cartridge to Subaru Select Monitor. to EN(H4DOTC 2.5)-7, PREPARATION TOOL,
General Description.>
4) Connect the Subaru Select Monitor to data link
connector.
(1) Data link connector located in the lower por-
tion of the instrument panel (on the driver’s side).
(2) Connect the diagnosis cable to data link
connector.
CAUTION:
Do not connect the scan tools except for Suba-
ru Select Monitor and OBD-II general scan tool.5) Turn the ignition switch to ON (engine OFF) and
Subaru Select Monitor switch to ON.
6) Using the Subaru Select Monitor, call up DTC
and data, then record them.
2. READ DIAGNOSTIC TROUBLE CODE
(DTC) FOR ENGINE (NORMAL MODE)
Refer to “Read Diagnostic Trouble Code (DTC)” for
information about how to indicate DTC. EN(H4DOTC 2.5)-34, Read Diagnostic Trouble
Code (DTC).>
3. READ DIAGNOSTIC TROUBLE CODE
(DTC) FOR ENGINE (OBD MODE)
Refer to “Read Diagnostic Trouble Code (DTC)” for
information about how to indicate DTC. EN(H4DOTC 2.5)-34, Read Diagnostic Trouble
Code (DTC).>
EN-00038
EN-00039
EN-02353
(A) Power switch
EN-00040
(A)

EN(H4DOTC 2.5)-28
ENGINE (DIAGNOSTIC)
Subaru Select Monitor
4. READ CURRENT DATA FOR ENGINE. (NORMAL MODE)
1) On the «Main Menu» display screen, select the {Each System Check} and press the [YES] key.
2) On the «System Selection Menu» display screen, select the {Engine} and press the [YES] key.
3) Press the [YES] key after the information of engine type was displayed.
4) On the «Engine Diagnosis» screen, select the {Current Data Display/Save}, and then press the [YES] key.
5) On the «Data Display Menu» screen, select the {Data Display} and press the [YES] key.
6) Using the scroll key, move the display screen up or down until the desired data is shown.
 A list of the support data is shown in the following table.
Remarks Display Unit of measure
Battery voltage Battery Voltage V
Vehicle speed signal Vehicle Speed km/h or MPH
Engine speed signal Engine Speed rpm
Engine coolant temperature signal Coolant Temp.°C or °F
Ignition timing signal Ignition Timing deg
Throttle position signal Throttle Opening Angle %
Injection pulse width Fuel Injection #1 Pulse ms
Fuel pump duty control signal Fuel Pump Duty %
A/F sensor current A/F Sensor #1 Current mA
A/F sensor resistance A/F Sensor #1 ResistanceΩ
Front oxygen (A/F) sensor lambda value A/F Sensor #1 —
Rear oxygen sensor output signalRear O
2 Sensor
V
Short term fuel trim A/F Correction #1 %
Knock sensor compensation Knocking Correction deg
Atmospheric pressure signal Atmosphere Pressure mmHg, kPa, inHg or psi
Intake manifold relative pressure signal Mani. Relative Pressure mmHg, kPa, inHg or psi
Intake manifold absolute pressure signal Mani. Absolute Pressure mmHg, kPa, inHg or psi
A/F correction (short term fuel trim) by rear oxygen sensor A/F Correction #3 %
Long term whole fuel trim A/F Learning #1 %
Canister purge control solenoid valve duty ratio CPC Valve Duty Ratio %
Primary supercharged pressure control signal Primary Control %
Tumble generated valve position sensor signal (RH side) TGV Position Sensor R V
Tumble generated valve position sensor signal (LH side) TGV Position Sensor L V
Acceleration opening angle Accel Opening Angle %
VVT advance angle amount (R) VVT Adv. Amount R deg
VVT advance angle amount (L) VVT Adv. amount L deg
OCV duty R OCV Duty R %
OCV duty L OCV Duty L %
OCV current R OCV current R mA
OCV current L OCV Current L mA
Throttle motor duty Throttle Motor Duty %
Throttle power supply voltage Throttle Motor Voltage V
Sub throttle sensor voltage Sub-Throttle Sensor V
Main throttle sensor voltage Main-Throttle Sensor V
Sub acceleration sensor voltage Sub-Accelerator Sensor V
Main acceleration sensor voltage Main-Accelerator Sensor V
Memory vehicle speed Memorized Cruise Speed km/h
Alternate duty ratio ALT Duty %
Exhaust gas temperature signal Exhaust gas temperature°C
Estimated cumulative driving distance Odd Meter Km
Fuel level signal Fuel Level Voltage V
Intake air temperature signal Intake Air Temp.°C or °F
Mass air flow sensor signal Mass Air Flow g/s