Subaru Legacy (2005 year). Manual - part 313
EN(H4DOTC)(diag)-21
ENGINE (DIAGNOSTICS)
General Scan Tool
8. General Scan Tool
A: OPERATION
1. HOW TO USE GENERAL SCAN TOOL
1) Prepare a general 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
(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
Read out the data according to repair procedures.
(For detailed operation procedure, refer to the gen-
eral scan tool operation manual.)
NOTE:
For details concerning DTCs, refer to the List of Di-
agnostic Trouble Code (DTC). <Ref. to
EN(H4DOTC)(diag)-62, List of Diagnostic Trouble
Code (DTC).>
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 current powertrain diagnostic data
(MODE $01).
EN-02097
PID
Data
Unit of measure
01
Number of emission-related powertrain DTC and malfunction indicator light status and diag-
nosis support information
—
03
Fuel system control status
—
04
Calculated engine load value
%
05
Engine coolant temperature
°C or °F
06
Short term fuel trim
%
07
Long term fuel trim
%
0B
Intake manifold absolute pressure
mmHg, kPa, inHg or
psig
0C
Engine revolution
rpm
0D
Vehicle speed
km/h or MPH
0E
Ignition timing advance
°
0F
Intake air temperature
°C or °F
10
Air flow rate from mass air flow sensor
gm/s
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
Supporting OBD system
—
21
Driving distance after MIL illuminates
km or miles
24
A/F value and A/F sensor output voltage
— and V