Subaru Impreza 2004 User manual

FUJI HEAVY INDUSTRIES LTD. G1870GE5
2004 IMPREZA SERVICE MANUAL QUICK REFERENCE INDEX
CHASSIS SECTION
This service manual has been prepared
to provide SUBARU service personnel
with the necessary information and data
for the correct maintenance and repair
of SUBARU vehicles.
This manual includes the procedures
for maintenance, disassembling, reas-
sembling, inspection and adjustment of
components and diagnostics for guid-
ance of experienced mechanics.
Please peruse and utilize this manual
fully to ensure complete repair work for
satisfying our customers by keeping
their vehicle in optimum condition.
When replacement of parts during
repair work is needed, be sure to use
SUBARU genuine parts.
All information, illustration and specifi-
cations contained in this manual are
based on the latest product information
available at the time of publication
approval.
FRONT SUSPENSION FS
REAR SUSPENSION RS
WHEEL AND TIRE SYSTEM WT
DIFFERENTIALS DI
TRANSFER CASE TC
DRIVE SHAFT SYSTEM DS
ABS ABS
ABS (DIAGNOSTICS) ABS(diag)
BRAKE BR
PARKING BRAKE PB
POWER ASSISTED SYSTEM
(POWER STEERING) PS

ABS (DIAGNOSTICS)
ABS(diag)
Page
1. Basic Diagnostic Procedure ........................................................................2
2. Check List for Interview...............................................................................4
3. General Description ....................................................................................8
4. Electrical Components Location................................................................10
5. Control Module I/O Signal.........................................................................12
6. Subaru Select Monitor...............................................................................16
7. Read Diagnostic Trouble Code (DTC) ......................................................19
8. Inspection Mode........................................................................................20
9. Clear Memory Mode..................................................................................21
10. ABS Warning Light/Brake Warning Light Illumination Pattern ..................22
11. List of Diagnostic Trouble Code (DTC) .....................................................23
12. Diagnostics Procedure without Diagnostic Trouble Code (DTC) ..............26
13. Diagnostics Procedure with Diagnostic Trouble Code (DTC) ...................37
14. General Diagnostics Table......................................................................127

ABS(diag)-2
ABS (DIAGNOSTICS)
Basic Diagnostic Procedure
1. Basic Diagnostic Procedure
A: PROCEDURE
CAUTION:
Remove foreign matter (dust, water, etc.) from the ABSCM&H/U connector during removal and instal-
lation.
NOTE:
•To check the harness for broken wires or short circuits, shake it while holding it or the connector.
•Check list for interview. <Ref. to ABS(diag)-4, Check List for Interview.>
Step Check Yes No
1 CHECK PRE-INSPECTION.
1)Ask the customer when and how trouble
occurred using interview checklist. <Ref. to
ABS(diag)-4, Check List for Interview.>
2)Before performing diagnosis, inspect the unit
which might influence the ABS problem. <Ref.
to ABS(diag)-8, INSPECTION, General
Description.>
Is the unit that might influence
the ABS problem normal?
Go to step 2. Repair or replace
each unit.
2 CHECK INDICATION OF DTC DISPLAY.
1)Turn the ignition switch to OFF.
2)Connect the SUBARU SELECT MONITOR
to data link connector.
3)Turn the ignition switch to ON and SUBARU
SELECT MONITOR to ON.
N
O
TE:
If the communication function of Subaru Select
Monitor cannot be executed normally, check
communication circuit. <Ref. to ABS(diag)-37,
COMMUNICATION FOR INITIALIZING IM-
POSSIBLE, Diagnostics Procedure with Diag-
nostic Trouble Code (DTC).>
4)Read the DTC. <Ref. to ABS(diag)-17,
READ CURRENT DATA, OPERATION, Sub-
aru Select Monitor.>
5)Record all DTCs and freeze frame data.
Is the DTC displayed? Go to step 4. Go to step 3.
3 PERFORM THE GENERAL DIAGNOSTICS.
1)Inspect using “General Diagnostics Table”.
<Ref. to ABS(diag)-127, General Diagnostics
Table.>
2)Perform the clear memory mode. <Ref. to
ABS(diag)-17, CLEAR MEMORY MODE,
OPERATION, Subaru Select Monitor.>
3)Perform the inspection mode. <Ref. to
ABS(diag)-20, Inspection Mode.>
4)Calling up the DTC. <Ref. to ABS(diag)-16,
READ DIAGNOSTIC TROUBLE CODE (DTC),
OPERATION, Subaru Select Monitor.>
Check DTC is not displayed.
Is the ABS warning light turned
off after ignition switch OFF?
Complete the
diagnosis.
Inspect using
“diagnostics pro-
cedure for No
DTC”. <Ref. to
ABS(diag)-40, NO
DTC.>

ABS(diag)-3
ABS (DIAGNOSTICS)
Basic Diagnostic Procedure
4 PERFORM THE DIAGNOSIS.
1)For the DTC list, refer to “List of DTC”. <Ref.
to ABS(diag)-23, WITH SUBARU SELECT
MONITOR, LIST, List of Diagnostic Trouble
Code (DTC).>
2)Repair trouble cause.
3)Perform the clear memory mode. <Ref. to
ABS(diag)-17, CLEAR MEMORY MODE,
OPERATION, Subaru Select Monitor.>
4)Perform the inspection mode. <Ref. to
ABS(diag)-20, Inspection Mode.>
5)Calling up the DTC. <Ref. to ABS(diag)-16,
READ DIAGNOSTIC TROUBLE CODE (DTC),
OPERATION, Subaru Select Monitor.>
Are the DTCs indicated on dis-
play?
Inspect using
“diagnostics pro-
cedure with Sub-
aru Select
Monitor”. <Ref. to
ABS(diag)-37,
Diagnostics Proce-
dure with Diagnos-
tic Trouble Code
(DTC).>
Complete the
diagnosis.
Step Check Yes No

ABS(diag)-4
ABS (DIAGNOSTICS)
Check List for Interview
2. Check List for Interview
A: CHECK
Check the following items about the vehicle’s state.
1. STATE OF ABS WARNING LIGHT
ABS warning light
comes on.
❏Always
❏Sometimes
❏Only once
❏Does not come on
•When / how long does it come on?:
Ignition key position ❏LOCK
❏ACC
❏ON (before starting engine)
❏START
❏On after starting (Engine is running)
❏On after starting (Engine is stop)
Timing ❏Immediately after ignition is ON.
❏Immediately after ignition starts.
❏When advancing km/h to km/h
MPH to MPH
❏While traveling at a constant speed km/h MPH
❏When decelerating km/h to km/h
MPH to MPH
❏When turning to right Steering angle : deg
Steering time : sec
❏When turning to left Steering angle : deg
Steering time : sec
❏When moving other electrical parts
•Parts name :
•Operating condition :

ABS(diag)-5
ABS (DIAGNOSTICS)
Check List for Interview
2. STATE OF BRAKE WARNING LIGHT
Brake warning light
comes on.
❏Always
❏Sometimes
❏Only once
❏Does not come on
❏When parking brake lever is pulled
❏When parking brake lever is released
•When / how long does it come on?:
Ignition key position ❏LOCK
❏ACC
❏ON (before starting engine)
❏START
❏On after starting (Engine is running)
❏On after starting (Engine is stop)
Timing ❏Immediately after ignition is ON.
❏Immediately after ignition starts.
❏When advancing km/h to km/h
MPH to MPH
❏While traveling at a constant speed km/h MPH
❏When decelerating km/h to km/h
MPH to MPH
❏When turning to right Steering angle : deg
Steering time : sec
❏When turning to left Steering angle : deg
Steering time : sec
❏When operating other electrical parts
•Parts name :
•Operating condition :

ABS(diag)-6
ABS (DIAGNOSTICS)
Check List for Interview
3. SYMPTOMS
ABS operating condi-
tion
❏Does not operate.
❏Operates only when abruptly applying brakes. Vehicle speed : km/h
MPH
•How to step on brake pedal :
a) Operating time : sec
b) Operating noise : ❏Produce / ❏Does not produce
•What kind of noise? ❏Knock
❏Gong gong
❏Bong
❏Buzz
❏Gong gong buzz
❏Others :
c) Reaction force of brake pedal
❏Stick
❏Press down once with a clunk
❏Press and released
❏Others :
Behavior of vehicle a) Directional stability cannot be obtained or steering refuses to work when applying brakes :
❏Yes / ❏No
•When : ❏Vehicle turns to right
❏Vehicle turns to left
❏Spins
❏Others :
b) Directional stability cannot be obtained or steering refuses to work when accelerating :
❏Yes / ❏No
•When : ❏Vehicle turns to right
❏Vehicle turns to left
❏Spins
❏Others :
c) Brakes out of order : ❏Yes / ❏No
•What : ❏Braking distance is long
❏Brakes lock or drag
❏Pedal stroke is long
❏Pedal sticks
❏Others :
d) Poor acceleration : ❏Yes / ❏No
•What : ❏Fails to accelerate
❏Engine stalls
❏Others :
e) Occurrence of vibration : ❏Yes / ❏No
•Where
•What kind :
f) Occurrence of abnormal noise : ❏Yes / ❏No
•Where
•What kind :
g) Occurrence of other phenomena : ❏Yes / ❏No
•What kind :

ABS(diag)-7
ABS (DIAGNOSTICS)
Check List for Interview
4. CONDITIONS UNDER WHICH TROUBLE OCCURS
Environment a) Weather ❏Fine
❏Cloudy
❏Rainy
❏Snowy
❏Various/Others :
b) Ambient temperature °C (°F)
c) Road ❏Urban area
❏Suburbs
❏Highway
❏General road
❏Ascending slope
❏Descending slope
❏Paved road
❏Gravel road
❏Muddy road
❏Sandy place
❏Others :
d) Road surface ❏Dry
❏Wet
❏New-fallen snow
❏Compressed snow
❏Frozen slope
❏Others :
Condition a) Brakes Deceleration : g
❏Continuous / ❏Intermittent
b) Accelerator Acceleration : g
❏Continuous / ❏Intermittent
c) Vehicle speed km/h MPH
❏Advancing
❏Accelerating
❏Reducing speed
❏Low speed
❏Turning
❏Others :
d) Tire inflation pressure Front RH tire : kPa
Front LH tire : kPa
Rear RH tire : kPa
Rear LH tire : kPa
e) Degree of wear Front RH tire :
Front LH tire :
Rear RH tire :
Rear LH tire :
f) Genuine parts are used. : ❏Yes / ❏No
g) Chain is passed around tires. : ❏Yes / ❏No
h) T tire is used. : ❏Yes / ❏No
i) Condition of suspension alignment :
j) Loading state :
k) Repair parts are used. : ❏Yes / ❏No
•What :
l) Others :

ABS(diag)-8
ABS (DIAGNOSTICS)
General Description
3. General Description
A: CAUTION
1. SUPPLEMENTAL RESTRAINT SYSTEM
“AIRBAG”
Airbag system wiring harness is routed near the
ABS wheel speed sensor, ABS control module and
hydraulic control unit.
CAUTION:
•All airbag system wiring harness and con-
nectors are colored yellow. Do not use electri-
cal test equipment on these circuit.
•Be careful not to damage the airbag system
wiring harness when servicing the ABS wheel
speed sensor, ABS control module and hydrau-
lic control unit.
B: INSPECTION
Before performing diagnostics, check the following
items which might affect ABS problems:
1. BATTERY
Measure the battery voltage and specific gravity of
electrolyte.
Standard voltage: 12 V, or more
Specific gravity: Above 1.260
2. BRAKE FLUID
1) Check the brake fluid level.
2) Check the brake fluid leakage.
3. HYDRAULIC UNIT
Check the hydraulic unit.
•With brake tester <Ref. to ABS-8, CHECKING
THE HYDRAULIC UNIT ABS OPERATION WITH
BRAKE TESTER, INSPECTION, ABS Control
Module and Hydraulic Control Unit (ABSCM&H/
U).>
•Without brake tester <Ref. to ABS-7, CHECK-
ING THE HYDRAULIC UNIT ABS OPERATION
BY PRESSURE GAUGE, INSPECTION, ABS
Control Module and Hydraulic Control Unit (AB-
SCM&H/U).>
4. BRAKE DRAG
Check for brake drag.
5. BRAKE PAD AND ROTOR
Check the brake pad and rotor.
•Front <Ref. to BR-27, INSPECTION, Front Brake
Pad.> and <Ref. to BR-29, INSPECTION, Front
Disc Rotor.>
•Rear <Ref. to BR-38, INSPECTION, Rear Brake
Pad.> and <Ref. to BR-40, INSPECTION, Rear
Disc Rotor.> or <Ref. to BR-48, INSPECTION,
Rear Drum Brake Shoe.> and <Ref. to BR-49, IN-
SPECTION, Rear Drum Brake Drum.>
6. TIRE
Check the tire specifications, tire wear and air pres-
sure. <Ref. to WT-2, SPECIFICATIONS, General
Description.>

ABS(diag)-9
ABS (DIAGNOSTICS)
General Description
C: PREPARATION TOOL
1. SPECIAL TOOLS
2. GENERAL PURPOSE TOOLS
ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS
24082AA230 CARTRIDGE Troubleshooting for electrical systems.
22771AA030 SUBARU SELECT
MONITOR KIT
Troubleshooting for electrical systems.
TOOL NAME REMARKS
Circuit tester Used for measuring resistance, voltage and amperage.
Oscilloscope Used for measuring sensor.
ST24082AA230
ST22771AA030

ABS(diag)-10
ABS (DIAGNOSTICS)
Electrical Components Location
4. Electrical Components Location
A: LOCATION
(1) ABS control module and hydraulic
control unit (ABSCM&H/U)
(6) Transmission control module
(TCM) (AT model)
(12) Master cylinder
(13) Brake & EBD warning light
(2) Connector (7) Tone wheel (14) Lateral G sensor (STi model)
(3) Diagnosis connector (8) ABS wheel speed sensor
(4) ABS warning light (9) Wheel cylinder
(5) Data link connector (for Subaru
Select Monitor)
(10) G sensor
(11) Stop light switch
ABS00329
(9)
(7)
(4)
(13)
(6)
(5)
(3)
(2)
(1)
(8)
(7)
(9)
(8)
(7)
(9)
(12)
(11)
(10)
(14) (8)
(8)
(7)
(9)

ABS(diag)-11
ABS (DIAGNOSTICS)
Electrical Components Location
ABS00101
(1)
ABS00337
(13)
ABS00102
(10)
ABS00106
(3)
ABS00344
(5)
ABS00107
(7)
(8)
FRONT
(7)
(8)
ABS00104
REAR
ABS00345
(14)

ABS(diag)-12
ABS (DIAGNOSTICS)
Control Module I/O Signal
5. Control Module I/O Signal
A: ELECTRICAL SPECIFICATION
NOTE:
•The terminal numbers in ABS control module and hydraulic control unit connector are as shown in the fig-
ure.
•When the connector is removed from ABSCM&H/U, the connector switch closes the circuit between ter-
minal No. 22 and No. 23. The ABS warning light illuminates.
(1) ABS control module and hydraulic
control unit (ABSCM&H/U) con-
nector
(2) Connector switch
ABS00182
1234 5 6 7 8 9
10 11 12 13 14 15
16 17 18 19 20 21 22
27 28 29 30 31 23 24 25 26
F49B301 or
(2)
(1)

ABS(diag)-13
ABS (DIAGNOSTICS)
Control Module I/O Signal
*1: Measure the I/O signal voltage after removing the connector from the ABSCM&H/U terminal.
*2: Measure the I/O signal voltage at connector (F2).
Contents Terminal No.
(+) —(−)
Input/Output signal
Measured value and measuring conditions
ABS wheel speed sen-
sor*2
(Wheel speed sensor)
Front left wheel 9 —10
0.12 —1 V
(When it is 20 Hz.)
Front right wheel 11 —12
Rear left wheel 7 —8
Rear right wheel 14 —15
Valve relay power supply*1 24 —23 10 —15 V
Motor relay power supply*1 25 —23 10 —15 V
G sensor*2
Power supply 30 —28 4.75 —5.25 V
Ground 28 —
Output 6 —28 2.1 —2.5 V when vehicle is in horizontal position.
Lateral G sensor
(STi model)
Power supply 30 —28 4.75 —5.25 V
Ground 28 —
Output 29 —28 2.3 —2.7 V when vehicle is in horizontal position.
Stop light switch*1 2 —23 Less than 1.5 V when the stop light is OFF and, 10 —15 V
when the stop light is ON.
ABS warning light*2 22 —23
Less than 1.5 V within 1.5 seconds immediately after ignition
switch has been turned to ON, and 10 —15 V after 1.5 sec-
onds has elapsed.
Brake warning light*2
(EBD warning light) 21 —23
Less than 1.5 V within 1.5 seconds immediately after ignition
switch has been turned to ON, and 10 —15 V after 1.5 sec-
onds has elapsed.
AT ABS signal
(AT models only) 31 —23 Less than 1.5 V when the ABS control still operates and more
than 5.5 V when ABS does not operate.
ABS operation signal monitor 3 —23 Less than 1.5 V when the ABS control still operates and more
than 5.5 V when ABS does not operate.
Subaru Select Moni-
tor*2
Data is received. 20 —23 Less than 1.5 V when no data is received.
Data is sent. 5 —23 4.75 —5.25 V when no data is sent.
ABS diagnosis connec-
tor
Terminal No. 3 29 —23 10 —15 V when ignition switch is ON.
Terminal No. 6 4 —23 10 —15 V when ignition switch is ON.
Power supply*1 1 —23 10 —15 V when ignition switch is ON.
Grounding line 23 —
Grounding line 26 —

ABS(diag)-14
ABS (DIAGNOSTICS)
Control Module I/O Signal
B: WIRING DIAGRAM
(1) Battery (12) Rear inlet solenoid valve LH (23) G sensor
(2) IGN (13) Rear outlet solenoid valve LH (24) Front ABS wheel speed sensor LH
(3) ABS control module and hydraulic
control unit (ABSCM&H/U)
(14) Rear inlet solenoid valve RH
(15) Rear outlet solenoid valve RH (25) Front ABS wheel speed sensor
RH
(4) ABS control module area (16) Transmission control module
(TCM) (AT model)
(5) Valve relay (26) Rear ABS wheel speed sensor LH
(6) Motor relay (17) Diagnosis connector (27) Rear ABS wheel speed sensor
RH
(7) Motor (18) Data link connector
(8) Front inlet solenoid valve LH (19) Brake warning light (28) Lateral G sensor (STi model)
(9) Front outlet solenoid valve LH (20) ABS warning light
(10) Front inlet solenoid valve RH (21) Stop light switch
(11) Front outlet solenoid valve RH (22) Stop light
ABS00375
(3)
(5)
(6)
(7)
(8)
M
(9)
(10)
(16)
(17)
(18)
(19)
(2)
(4)
(1)
(20)
(21)
(22)
(23)
(24)
(11)
(12)
(13)
(14)
(15)
(25)
(26)
(27)
(28)

ABS(diag)-15
ABS (DIAGNOSTICS)
Control Module I/O Signal
C: WAVEFORM
(1) ABS wheel speed sensor
(2) Terminal No.
(3) Standard output voltage
ABS00034
[V]
(1)
(2)
(3)
910
78
0
20 Hz
1V
20 Hz : 0.12
1211
1514

ABS(diag)-16
ABS (DIAGNOSTICS)
Subaru Select Monitor
6. Subaru Select Monitor
A: OPERATION
1. READ DIAGNOSTIC TROUBLE CODE
(DTC)
1) Prepare the Subaru Select Monitor kit.
2) Connect the diagnosis cable to Subaru Select
Monitor.
3) Insert the cartridge into Subaru Select Monitor.
<Ref. to ABS(diag)-9, SPECIAL TOOLS, PREPA-
RATION TOOL, General Description.>
4) Connect the Subaru Select Monitor to data link
connector.
(1) Data link connector located in the lower por-
tion of instrument panel (on the driver’s side).
(2) Connect the diagnosis cable to data link
connector.
CAUTION:
Do not connect the scan tools except for Suba-
ru Select Monitor and OBD-II general scan tool.
5) Turn the ignition switch to ON (engine OFF) and
Subaru Select Monitor switch to ON.
6) On the «Main Menu»display screen, select the
{Each System Check} and press [YES] key.
7) On the «System Selection Menu»display
screen, select the {Brake Control System} and
press [YES] key.
8) Press the [YES] key after the information of ABS
type is displayed.
9) On the «ABS Diagnosis»display screen, select
the {DTC Display} and press [YES] key.
10) On the «DTC Display»display screen, select
the {Current DTC} or {History DTC} and press
[YES] key.
NOTE:
•For detailed operation procedure, refer to the
SUBARU SELECT MONITOR OPERATION MAN-
UAL.
•For detailed concerning the DTC, refer to the
LIST OF DTC. <Ref. to ABS(diag)-23, List of Diag-
nostic Trouble Code (DTC).>
•A maximum of 3 DTCs are displayed in order of
occurrence.
•If a particular DTC is not properly stored in mem-
ory (due to a drop in ABSCM&H/U power supply,
etc.) when a problem occurs, the DTC, followed by
a question mark “?”, appears on the Subaru Select
Monitor display. This shows it may be an unreliable
reading.
(1) Data link connector
ABS00111
ABS00112
(1)
ABS00346
(1) Power switch
Display screen Contents to be monitored
Current The most recent DTC appears on Sub-
aru Select Monitor display.
Old The second most recent DTC appears
on Subaru Select Monitor display.
Older The third most recent DTC appears on
Subaru Select Monitor display.
Before 3 DTC issued after elapse of a specified
period of time.
ABS00114
(1)

ABS(diag)-17
ABS (DIAGNOSTICS)
Subaru Select Monitor
2. READ CURRENT DATA
1) On the «Main Menu»display screen, select the {Each System Check} and press «YES»key.
2) On the «System Selection Menu»display screen, select the {Brake Control System} and press «YES»
key.
3) Press the «YES»key after the information of ABS type is displayed.
4) On the «Brake Control Diagnosis»display screen, select the {Current Data Display & Save} and press
«YES»key.
5) On the «Data Display Menu»display screen, select the {Data Display} and press «YES»key.
6) Using the scroll key, move the display screen up or down until desired data is shown.
•A list of the support data is shown in the following table.
NOTE:
For detailed operation procedure, refer to the SUBARU SELECT MONITOR OPERATION MANUAL.
3. CLEAR MEMORY MODE
1) On the «Main Menu»display screen, select the
{2. Each System Check} and press «YES»key.
2) On the «System Select Menu»display screen,
select the {Brake System} and press «YES»key.
3) Press the «YES»key after the information of en-
gine type is displayed.
4) On the «Brake Control Diagnosis»display
screen, select the {Clear Memory} and press
«YES»key.
5) When the “Done”and “turn ignition switch to
OFF”are shown on display screen, turn the Subaru
Select Monitor and ignition switch to OFF.
NOTE:
For detailed operation procedure, refer to the SUB-
ARU SELECT MONITOR OPERATION MANUAL.
4. ABS SEQUENCE CONTROL
Display screen Contents to be monitored Unit of measure
FR Wheel Speed Wheel speed detected by Front ABS wheel speed sensor RH is
displayed km/h or MPH
FL Wheel Speed Wheel speed detected by Front ABS wheel speed sensor LH is
displayed km/h or MPH
RR Wheel Speed Wheel speed detected by Rear ABS wheel speed sensor RH is
displayed km/h or MPH
RL Wheel Speed Wheel speed detected by Rear ABS wheel speed sensor LH is dis-
played km/h or MPH
Stop Light Switch Stop light switch signal ON or OFF
Stop Light Switch Stop light switch monitor voltage is displayed. V
G Sensor Output Signal Voltage equivalent to vehicle acceleration detected by analog G
sensor is displayed. V
Lateral G Sensor Output Sig-
nal
Lateral G detected by Lateral G sensor is displayed in voltage. (STi
model) V
Valve Relay Signal Valve Relay Signal ON or OFF
Motor Relay Signal Motor Relay Signal ON or OFF
ABS Signal to TCM ABS operation signal from ABS control module to TCM ON or OFF
ABS Warning Lamp ON operation of ABS warning light is displayed. ON or OFF
EBD Warning Light ON operation of EBD warning light is displayed. ON or OFF
Motor Relay Monitor Operating condition of motor relay is displayed. ON or OFF
Valve Relay Monitor Operating condition of the valve relay is displayed. ON or OFF
CCM Signal ABS operation signal from ABS control module to TCM ON or OFF
Display screen Contents to be monitored
Clear memory? Function of clearing DTC.
Display
screen Contents to be monitored Index No.
ABS
sequence
control
Perform ABS sequence
control by operating valve
and pump motor sequen-
tially.
<Ref. to ABS-
10, ABS
Sequence Con-
trol.>

ABS(diag)-18
ABS (DIAGNOSTICS)
Subaru Select Monitor
5. FREEZE FRAME DATA
NOTE:
•Data stored at the time of trouble occurrence is
shown on display.
•Each time trouble occurs, the latest information
is stored in the freeze frame data in memory.
•Freeze frame data will be memorized maximum
to three.
•If freeze frame data is not properly stored in
memory (due to a drop in ABSCM power supply,
etc.), a DTC, preceded by a question mark “?”, ap-
pears on the Subaru Select Monitor display. This
shows it may be an unreliable reading.
6. ANALOG DATA ARE DISPLAYED
7. ON/OFF DATA ARE DISPLAYED
Display screen Contents to be monitored
FR wheel speed
Wheel speed detected by Front ABS
wheel speed sensor RH is displayed in
km/h or mile/h.
FL wheel speed
Wheel speed detected by Front ABS
wheel speed sensor LH is displayed in
km/h or mile/h.
RR wheel speed
Wheel speed detected by Rear ABS
wheel speed sensor RH is displayed in
km/h or mile/h.
RL wheel speed
Wheel speed detected by Rear ABS
wheel speed sensor LH is displayed in
km/h or mile/h.
ABSCM power
voltage
Power (in volts) supplied to ABSCM&
H/U appears on the Subaru Select Moni-
tor display.
G sensor output
voltage
Voltage equivalent to vehicle accelera-
tion detected by analog G sensor is dis-
played.
Lateral G sen-
sor output volt-
age
Voltage equivalent to Lateral G detected
by analog Lateral G sensor is displayed.
Motor relay mon-
itor Motor relay operation monitor signal
Stop light switch Stop light switch signal
ABS signal to
TCM
ABS operation signal from ABS control
module to TCM
ABS-AT control ABS operation signal from ABS control
module to TCM
ABS operation
signal ABS operation signal
Condition of
malfunction
Displays if the malfunction has occurred
to ABS only, or to ABS and EBD.
Display screen Contents to be monitored
FR wheel speed
Wheel speed detected by Front ABS
wheel speed sensor RH is displayed in
km/h or mile/h.
FL wheel speed
Wheel speed detected by Front ABS
wheel speed sensor LH is displayed in
km/h or mile/h.
RR wheel speed
Wheel speed detected by Rear ABS
wheel speed sensor RH is displayed in
km/h or mile/h.
RL wheel speed
Wheel speed detected by Rear ABS
wheel speed sensor LH is displayed in
km/h or mile/h.
Stop light switch Stop light switch monitor voltage is dis-
played.
G sensor output
voltage
Refers to vehicle acceleration detecting
by analog G sensor. It appears on the
Subaru Select Monitor display in volts.
Lateral G sen-
sor output volt-
age
Voltage equivalent to Lateral G detected
by analog Lateral G sensor is displayed.
Display screen Contents to be monitored
Stop light switch Stop light switch signal
Valve relay signal Valve relay signal
Motor relay signal Motor relay signal
ABS signal to TCM ABS operation signal from ABS con-
trol module to TCM
ABS warning light ABS warning light
Valve relay monitor Valve relay operation monitor signal
Motor relay monitor Motor relay operation monitor signal
CCM signal ABS operation signal from ABS con-
trol module to TCM
Display screen Contents to be monitored

ABS(diag)-19
ABS (DIAGNOSTICS)
Read Diagnostic Trouble Code (DTC)
7. Read Diagnostic Trouble
Code (DTC)
A: OPERATION
Refer to SUBARU SELECT MONITOR for informa-
tion about how to obtain and understand DTCs.
<Ref. to ABS(diag)-16, Subaru Select Monitor.>