Subaru 2002 IMPREZA Service Manual page 1192

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) 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).
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
01 Number of emission-related powertrain trouble codes and MIL 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
0F Intake air temperature
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
15
2
24 A/F sensor 1 output voltage and short term fuel trim associated with A/F sensor 1
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
EN0768
Data
EN(TURBO)-32
3) Using the OBD-II general scan tool, call up diag-
nostic trouble code(s) (DTC(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 the 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
(DTCs), refer to the List of Diagnostic Trouble Code
(DTC). <Ref. to EN(TURBO)-75, List of Diagnostic
Trouble Code (DTC).>
Unit of measure
ON/OFF
—
%
°C
%
%
kPa
rpm
km/h
°
°C
g/sec
%
—
V and %
V and %
—