Obd-Ii General Scan Tool - Subaru LEGACY 2004 Service Manual

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) Connect the OBD-II general scan tool to data
link connector located in the lower portion of instru-
ment panel (on driver's side).
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.
PID Data
Number of emission-related powertrain DTC, malfunction indicator light status and diagnosis
01
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 manifold absolute pressure sensor
11 Throttle valve absolute opening angle
13 Check whether oxygen sensor is installed.
Oxygen sensor output voltage and short term fuel trim associated with oxygen sensor—bank
15
1 sensor 2
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 operation manual to access generic OBD-II PIDs (MODE
$01).
OBD-II General Scan Tool
3) Using the OBD-II general scan tool, call up DTC
and freeze frame data.
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
2.0)(diag)-66, List of Diagnostic Trouble Code
(DTC).>
EN-02533
EN(H4SO 2.0)(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
ENGINE (DIAGNOSTICS)
Unit of measure
—
—
%
°C
%
%
kPa
rpm
km/h
°
°C
g/sec
%
—
V and %
—
km
— and V