Obd-Ii General Scan Tool - Subaru Legacy 2003 Service Manual

ENGINE (DIAGNOSTICS)

9. 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 the data
link connector (A) located in the lower portion of the
instrument panel (on the driver's side).
( A )
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.
PID Data
01 Number of emission-related powertrain trouble codes and MI status
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
10 Air flow rate from pressure sensor
11 Throttle valve opening angle
13 Check whether oxygen sensor is installed.
Oxygen sensor output voltage and short term fuel trim associated with oxygen sensor—bank
14
1
Oxygen sensor output voltage and short term fuel trim associated with oxygen sensor—bank
15
2
1C On-board diagnosis system
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
EN-00710
EN(H4SO)-30
3) Using the OBD-II general scan tool, call up diag-
nostic trouble code(s) 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
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 diagnostic trouble codes, re-
fer to the List of Diagnostic Trouble Code (DTC).
<Ref. to EN(H4SO)-83, List of Diagnostic Trouble
Code (DTC).>
Unit of measure
ON/OFF and num-
ber
—
%
°C
%
%
kPa
rpm
km/h
°
g/sec
%
—
V and %
V and %
—