Subaru Legacy IV (2008 year). Service manual — part 507

SC(H6DO)-2

General Description

STARTING/CHARGING SYSTEMS

1. General Description

A: SPECIFICATION

Specifications for the 3.0 L DOHC non-turbo model
are included in the SC (H4SO) section. <Ref. to
SC(H4SO)-2, General Description.>

EN(H6DO)(diag)-2

Basic Diagnostic Procedure

ENGINE (DIAGNOSTICS)

1. Basic Diagnostic Procedure

A: PROCEDURE

1. ENGINE

Step

Check

Yes

No

1

CHECK ENGINE START FAILURE.
1) Ask the customer when and how the trouble
occurred using the interview checklist. <Ref. to
EN(H6DO)(diag)-3, CHECK, Check List for
Interview.>
2) Start the engine.

Does the engine start?

Go to step 2.

Inspection using
Diagnostics for
Engine Start Fail-
ure. <Ref. to
EN(H6DO)(diag)-
66, Diagnostics for
Engine Starting
Failure.>

2

CHECK ILLUMINATION OF MALFUNCTION
INDICATOR LIGHT.

Does the malfunction indicator
light illuminate?

Go to step 3.

Inspection using
“General Diagnos-
tic Table” <Ref. to
EN(H6DO)(diag)-
353, INSPEC-
TION, General
Diagnostic Table.>

3

CHECK THE COMMUNICATION STATUS.
1) Turn the ignition switch to OFF.
2) Connect the Subaru Select Monitor or gen-
eral scan tool to the data link connector.
3) Turn the ignition switch to ON, and run the
Subaru Select Monitor or general scan tool.

NOTE:
• SUBARU SELECT MONITOR
For detailed procedures, refer to “Subaru Select
Monitor”. <Ref. to EN(H6DO)(diag)-34, Subaru
Select Monitor.>
• General Scan Tool
For detailed operation procedures, refer to the
general scan tool operation manual.

Does Subaru select monitor or
general scan tool communicate
with vehicle normally?

Go to step 4.

Inspection using
“Diagnostics Pro-
cedure for Subaru
Select Monitor
Communication”.
<Ref. to
EN(H6DO)(diag)-
79, Diagnostic Pro-
cedure for Subaru
Select Monitor
Communication.>

4

CHECK DTC.
Read DTC using Subaru Select Monitor or gen-
eral scan tool.

NOTE:
• SUBARU SELECT MONITOR
Refer to “Read Diagnostic Trouble Code” for
detailed operation procedure. <Ref. to
EN(H6DO)(diag)-43, Read Diagnostic Trouble
Code (DTC).>
• General Scan Tool
For detailed operation procedures, refer to the
general scan tool operation manual.

Is DTC displayed on the Subaru
Select Monitor or general scan
tool?

Record the DTC.
Repair the trouble
cause. <Ref. to
EN(H6DO)(diag)-
81, List of Diagnos-
tic Trouble Code
(DTC).>
Go to step 5.

Repair the related
parts.

NOTE:
If DTC is not shown
on display although
the malfunction in-
dicator light illumi-
nates, perform the
diagnosis of mal-
function indicator
light circuit or com-
bination meter.
<Ref. to EN(H6DO)
(diag)-57, Malfunc-
tion Indicator Light.>

5

PERFORM DIAGNOSIS.
1) Perform the Clear Memory Mode. <Ref. to
EN(H6DO)(diag)-52, Clear Memory Mode.>
2) Perform the Inspection Mode. <Ref. to
EN(H6DO)(diag)-44, Inspection Mode.>

Is DTC displayed on the Subaru
Select Monitor or general scan
tool?

Inspect using
“Diagnostic Proce-
dure with Diagnos-
tic Trouble Code
(DTC)”. <Ref. to
EN(H6DO)(diag)-
89, Diagnostic Pro-
cedure with Diag-
nostic Trouble
Code (DTC).>

Finish the diagno-
sis.

EN(H6DO)(diag)-3

Check List for Interview

ENGINE (DIAGNOSTICS)

2. Check List for Interview

A: CHECK

1. CHECK LIST NO. 1

Check the following item when problem has occurred.

NOTE:
Use copies of this page for interviewing customers.

Customer’s name

Engine No.

Date of purchase

Fuel brand

Date of repair

Odometer reading

km

V.I.N.

miles

Weather

Fine
Cloudy
Rainy
Snowy
Various/Others:

Ambient air temperature

°C ( °F)

Hot
Warm
Cool
Cold

Place

Highway
Suburbs
Inner city
Uphill
Downhill
Rough road
Others:

Engine temperature

Cold
Warming-up
After warming-up
Any temperature
Others:

Engine speed

rpm

Vehicle speed

km/h (MPH)

Driving conditions

Not affected
At starting
While idling
At racing
While accelerating
While cruising
While decelerating
While turning (RH/LH)

Headlight

ON/

OFF

Rear defogger

ON/

OFF

Blower

ON/

OFF

Audio

ON/

OFF

A/C compressor

ON/

OFF

CD/Cassette

ON/

OFF

Radiator fan

ON/

OFF

Car phone

ON/

OFF

Front wiper

ON/

OFF

Wireless device

ON/

OFF

Rear wiper

ON/

OFF

EN(H6DO)(diag)-4

Check List for Interview

ENGINE (DIAGNOSTICS)

2. CHECK LIST NO. 2

Check the following item about the vehicle’s state when malfunction indicator light illuminates.

NOTE:
Use copies of this page for interviewing customers.

a) Other warning lights or indicators turn on.

Yes /

No

Low fuel warning light
Charge indicator light
Engine coolant temperature indicator light
Oil pressure warning light
ATF temperature indicator light or SPORT indicator light
Drivers control center differential indicator light
ABS warning light
VDC warning light
Cruise indicator light
SI-CRUISE warning light
Immobilizer indicator light
STEERING indicator light
Glow indicator
Sedimentor warning light
Others:

b) Fuel level

• Lack of gasoline:

Yes /

No

• Indicator position of fuel gauge:
• Experienced running out of fuel:

Yes /

No

c) Intentional connecting or disconnecting of harness connectors or spark plug cords:

Yes /

No

• What:

d) Intentional connecting or disconnecting of hoses:

Yes /

No

• What:

e) Installing of parts other than genuine parts:

Yes /

No

• What:
• Where:

f) Occurrence of noise:

Yes /

No

• From where:
• What kind:

g) Occurrence of smell:

Yes /

No

• From where:
• What kind:

h) Intrusion of water into engine compartment or passenger compartment:

Yes /

No

i) Troubles occurred

Engine does not start.
Engine stalls during idling.
Engine stalls while driving.
Engine speed decreases.
Engine speed does not decrease.
Rough idling
Poor acceleration
Back fire
After fire
Does not shift.
Excessive shift shock