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 :