Subaru Legacy 2004 Service Manual page 779

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 data link connector located in the lower
portion of instrument panel (on the driver's side).
3) Using the OBD-II general scan tool, call up DTC
and freeze frame data.
2. MODE $01 (CURRENT POWERTRAIN DIAGNOSTIC DATA)
Refer 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.
PID
Number of emission-related powertrain DTC and malfunction indicator light status and diag-
01
nosis support information
03 Fuel system control status
04 Calculated engine load value
05 Engine coolant temperature
06 Short term fuel trim
07 Long term fuel trim
0B Intake manifold absolute pressure
0C Engine revolution
0D Vehicle speed
0E Ignition timing advance
0F Intake air temperature
10 Air flow rate from mass air flow sensor
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
1C Supporting OBD system
21 Driving distance after MIL illuminates
24 A/F value and A/F sensor output voltage
NOTE:
Refer to OBD-II general scan tool manufacturer's instruction manual to access generic OBD-II PIDs (MODE
$01).
OBD-II General Scan Tool
OBD-II general scan tool functions consist of:
Read out the data according to repair procedures.
(For detailed operation procedures, refer to the op-
eration manual of OBD-II general scan tool.)
NOTE:
For details concerning DTC, refer to "List of Diag-
nostic Trouble Code (DTC)". <Ref. to EN(H4SO
2.5)(diag)-70, List of Diagnostic Trouble Code
EN-02533
(DTC).>
Data
EN(H4SO 2.5)(diag)-23
(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
(5) MODE $06: Request on-board monitoring
test results for non-continuously monitored sys-
tems
(6) MODE $07: Request on-board monitoring
test results for continuously monitored systems
(7) MODE $09: Request vehicle information
ENGINE (DIAGNOSTICS)
Unit of measure
—
—
%
!C
%
%
kPa
rpm
km/h
!
!C
g/sec
%
—
V and %
—
km
— and V