Subaru Forester 2004 Service Manual page 199

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTIC)
BF:DTC P1090 TUMBLE GENERATED VALVE SYSTEM 1 (VALVE OPEN)
DTC DETECTING CONDITION:
Immediately at fault recognition
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4DOTC 2.5)-42,
OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4DOTC 2.5)-35, OPERATION,
Inspection Mode.>.
Step
1 CHECK ANY OTHER DTC ON DISPLAY.
2 CHECK TUMBLE GENERATOR VALVE RH
1) Remove the tumble generator valve assembly.
2) Check tumble generator valve body.
BG:DTC P1091 TUMBLE GENERATED VALVE SYSTEM 1 (VALVE CLOSE)
DTC DETECTING CONDITION:
Immediately at fault recognition
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4DOTC 2.5)-42,
OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4DOTC 2.5)-35, OPERATION,
Inspection Mode.>.
Step
1 CHECK ANY OTHER DTC ON DISPLAY.
2 CHECK TUMBLE GENERATOR VALVE RH
1) Remove the tumble generator valve assembly.
2) Check tumble generator valve body.
Check
Is any other DTC displayed?
Does the tumble generator
valve move smoothly? (No dirt
or foreign materials clogged)
Check
Is any other DTC displayed?
Does the tumble generator
valve move smoothly? (No dirt
or foreign materials clogged)
EN(H4DOTC 2.5)-198
Yes
Inspect the rele- Go to step 2.
vant DTC using
"List of Diagnostic
Trouble Code
(DTC)". <Ref. to
EN(H4DOTC 2.5)-
65, List of Diag-
nostic Trouble
Code (DTC).>
Replace the tum- Clean tumble gen-
ble generator valve erator valve.
assembly. <Ref. to
FU(H4DOTC 2.5)-
33, Tumble Gener-
ator Valve Assem-
bly.>
Yes
Inspect the rele- Go to step 2.
vant DTC using
"List of Diagnostic
Trouble Code
(DTC)". <Ref. to
EN(H4DOTC 2.5)-
65, List of Diag-
nostic Trouble
Code (DTC).>
Replace the tum- Clean tumble gen-
ble generator valve erator valve.
assembly. <Ref. to
FU(H4DOTC 2.5)-
33, Tumble Gener-
ator Valve Assem-
bly.>
No
No