Subaru Legacy 2002 Service Manual page 1408

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
No.
25 GROUP OF #5 AND #6 CYLINDERS
26 GROUP OF #1, #3 AND #5 CYLINDERS
27 GROUP OF #2, #4 AND #6 CYLINDERS
Step
Are there faults in #5 and
#6 cylinders?
Are there faults in #1, #3
and #5 cylinders?
Are there faults in #2, #4
and #6 cylinders?
EN(H6)-201
Check Yes
Repair or replace
faulty parts.
NOTE:
¼ Check the fol-
lowing items:
Spark plugs, fuel
injector, ignition
coil and compres-
sion ratio
¼ If no abnormal-
ity is discovered,
check for "IGNI-
TION CONTROL
SYSTEM" of #5
and #6 cylinders
side. <Ref. to
EN(H6)-74, IGNI-
TION CONTROL
SYSTEM, Diag-
nostics for Engine
Starting Failure.>
Repair or replace
faulty parts.
NOTE:
Check the follow-
ing items.
¼ Spark plugs
¼ Fuel injectors
¼ Skipping timing
belt teeth
Repair or replace
faulty parts.
NOTE:
Check the follow-
ing items.
¼ Spark plugs
¼ Fuel injectors
¼ Compression
ratio
¼ Skipping timing
belt teeth
Engine (DIAGNOSTICS)
No
Inspect DTC
P0171, P0172,
P0174 or P0175
using "List of
Diagnostic
Trouble Code
(DTC)". <Ref. to
EN(H6)-87, List of
Diagnostic
Trouble Code
(DTC).>
Inspect DTC
P0171, P0172,
P0174 or P0175
using "List of
Diagnostic
Trouble Code
(DTC)". <Ref. to
EN(H6)-87, List of
Diagnostic
Trouble Code
(DTC).>
Inspect DTC
P0171, P0172,
P0174 or P0175
using "List of
Diagnostic
Trouble Code
(DTC)". <Ref. to
EN(H6)-87, List of
Diagnostic
Trouble Code
(DTC).>