Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 203
EN(H4DOTC)(diag)-36
General Scan Tool
ENGINE (DIAGNOSTICS)
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).
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
$06
Short term fuel trim
%
$07
Long term fuel trim
%
$0B
Intake manifold absolute pressure
kPa
$0C
Engine speed
rpm
$0D
Vehicle speed
MPH
$0E
Ignition timing advance
°
$0F
Intake air temperature
°C
$10
Amount of intake air
g/s
$11
Throttle valve absolute opening angle
%
$12
Secondary air control status
—
$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
—
$1F
Elapsed time after starting the engine
sec
$21
Running distance after MIL turns on
miles
$24
A/F value and A/F sensor output voltage
— and V
$2E
Evaporative purge
%
$2F
Fuel level
%
$30
Number of warm ups after DTC clear
time
$31
Travel distance after DTC clear
miles
$33
Atmospheric pressure
kPa
$34
A/F sensor λ value, current
— and mA
$3C
Catalyst temperature
°C
$41
Diagnostic monitor of each drive cycle
—
$42
ECM power voltage
V
$43
Absolute load
%
$44
A/F target lambda
—
$45
Relative throttle opening angle
%
$46
Ambient temperature
°C
$47
Absolute throttle opening angle 2
%
$49
Absolute accelerator opening angle 1
%
$4A
Absolute accelerator opening angle 2
%
$4C
Target throttle opening angle
%
$4D
Engine operation time during MIL on
min
$4E
Elapsed time after DTC clear
min
$51
Fuel used
—
$5A
Relative accelerator opening angle
%
$65
Neutral status
—
EN(H4DOTC)(diag)-37
General Scan Tool
ENGINE (DIAGNOSTICS)
3. MODE $02 (POWERTRAIN FREEZE FRAME DATA)
Refer to data denoting the operating condition when trouble is detected by on-board diagnosis 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 freeze frame data (MODE $02).
4. MODE $03 (EMISSION-RELATED POWERTRAIN DTC)
ertrain DTC. <Ref. to EN(H4DOTC)(diag)-87, List of Diagnostic Trouble Code (DTC).>
5. MODE $04 (CLEAR/RESET EMISSION-RELATED DIAGNOSTIC INFORMATION)
Refer to the mode used to clear or reset emission-related diagnostic information.
NOTE:
Refer to the manufacturer’s operation manual for the general scan tool to clear the emission-related diag-
nostic information (MODE $04).
PID
Data
Unit of measure
$02
DTC that caused freeze frame data to be stored
—
$03
Fuel system control status
—
$04
Calculated engine load value
%
$05
Engine coolant temperature
°C
$06
Short term fuel trim
%
$07
Long term fuel trim
%
$0B
Intake manifold absolute pressure
kPa
$0C
Engine speed
rpm
$0D
Vehicle speed
MPH
$0E
Ignition timing advance
°
$0F
Intake air temperature
°C
$10
Intake air amount
g/s
$11
Throttle valve absolute opening angle
%
$12
Secondary air control status
—
$13
Air fuel ratio sensor
—
$15
Rear oxygen sensor voltage, compensation value
V and %
$1C
Supporting OBD system
—
$1F
Elapsed time after starting the engine
sec
$2E
Evaporative purge
%
$2F
Fuel level
%
$33
Barometric pressure
kPa
$42
ECM power voltage
V
$43
Absolute load
%
$44
A/F target lambda
—
$45
Relative throttle opening angle
%
$46
Ambient temperature
°C
$47
Absolute throttle opening angle 2
%
$49
Absolute accelerator opening angle 1
%
$4A
Absolute accelerator opening angle 2
%
$4C
Target throttle opening angle
%
$65
Neutral status
—
EN(H4DOTC)(diag)-38
General Scan Tool
ENGINE (DIAGNOSTICS)
6. MODE $06
Refer to diagnostic value of troubleshooting and data of test limit indicated on the support data bit sequence
table. A list of the support data is shown in the following table.
NOTE:
Some items are not displayed according to the specifications.
OBDMID
TID
SID
Diagnostic item
$01
$84
$1E
A/F sensor range failure (Bank 1 Sensor 1)
$85
$1E
$86
$20
A/F sensor response failure (Bank 1 Sensor 1)
$91
$20
$92
$10
$A3
$20
$A4
$10
$AC
$10
$AD
$10
$AE
$10
$AF
$10
$CD
$20
$CF
$20
$DF
$10
$02
$07
$0B
Oxygen sensor drop failure (Bank 1 Sensor 2)
$08
$0B
$A5
$0B
$05
$10
Oxygen sensor response failure (Bank 1 Sensor 2)
$06
$10
$BD
$10
$D1
$10
Oxygen sensor delay failure (Bank 1 Sensor 2)
$D2
$01
$21
$89
$20
Catalyst deterioration diagnosis (Bank 1)
$35
$8B
$9D
VVT monitor (Bank 1)
$8C
$9D
$8D
$9D
$8E
$9D
$D3
$9D
$D4
$9D
$D5
$9D
$D6
$9D
$36
$8B
$9D
VVT monitor (Bank 2)
$8C
$9D
$8D
$9D
$8E
$9D
$D3
$9D
$D4
$9D
$D5
$9D
$D6
$9D
EN(H4DOTC)(diag)-39
General Scan Tool
ENGINE (DIAGNOSTICS)
7. MODE $07
Refer to the data of DTC (pending code) for troubleshooting result about emission in the first time.
8. MODE $08 (REQUEST CONTROL FOR ON-BOARD SYSTEM, TEST, AND COMPONENT)
Perform “Active Test” of the on-board system.
9. MODE $09
Refer to the data of the vehicle specification.
$3C
$96
$FE
Evaporative emission control system (0.02 inch leak)
$C1
$FE
$C2
$FE
$C3
$FE
$C4
$FE
$C5
$FE
$C6
$35
$C7
$FE
$C8
$FE
$C9
$FE
$CA
$FE
$3D
$98
$FE
Evaporative emission control system (Purge flow)
$CB
$35
ELCM purge flow
$CC
$FE
$41
$9B
$14
A/F sensor heater characteristics failure (Bank 1 Sensor 1)
$42
$A2
$24
Oxygen sensor heater characteristics failure (Bank 1 Sensor 2)
$71
$9E
$17
Secondary air system (all systems)
$9F
$0B
$A1
$0B
$B0
$17
Secondary air system (relay 2 — combination valve 2)
$B3
$0B
$B5
$0B
$B4
$0B
$B6
$0B
$B8
$0B
$B9
$31
$BA
$31
$A1
$0B
$24
Misfire monitoring (All cylinders)
$0C
$24
$A2
$0B
$24
Misfire monitoring (#1 cylinder)
$0C
$24
$A3
$0B
$24
Misfire monitoring (#2 cylinder)
$0C
$24
$A4
$0B
$24
Misfire monitoring (#3 cylinder)
$0C
$24
$A5
$0B
$24
Misfire monitoring (#4 cylinder)
$0C
$24
OBDMID
TID
SID
Diagnostic item
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