Subaru Legacy 2005 Service Manual page 928

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
BP:DTC P2004 INTAKE MANIFOLD RUNNER CONTROL STUCK OPEN (BANK
1)
DTC DETECTING CONDITION:
Immediately at fault recognition
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)-
40, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO 2.5)(diag)-33, Inspection Mode.>.
Step
1 CHECK ANY OTHER DTC ON DISPLAY.
2 CHECK TUMBLE GENERATOR VALVE RH.
1) Remove the tumble generator valve assem-
bly.
2) Check the tumble generator valve body.
BQ:DTC P2005 INTAKE MANIFOLD RUNNER CONTROL STUCK OPEN (BANK
2)
DTC DETECTING CONDITION:
Immediately at fault recognition
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)-
40, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO 2.5)(diag)-33, Inspection Mode.>.
Step
1 CHECK ANY OTHER DTC ON DISPLAY.
2 CHECK TUMBLE GENERATOR VALVE LH.
1) Remove the tumble generator valve assem-
bly.
2) Check the tumble generator valve body.
Check
Is any other DTC displayed?
Does the tumble generator
valve move smoothly? (No dirt,
no foreign material clogged)
Check
Is any other DTC displayed?
Does the tumble generator
valve move smoothly? (No dirt,
no foreign material clogged)
EN(H4SO 2.5)(diag)-204
Yes
Inspect the rele- Go to step 2.
vant DTC using
"List of Diagnostic
Trouble Code
(DTC)". <Ref. to
EN(H4SO
2.5)(diag)-69, List
of Diagnostic Trou-
ble Code (DTC).>
Replace the tum- Clean tumble gen-
ble generator valve erator valve.
assembly. <Ref. to
FU(H4SO 2.5)-28,
Tumble Generator
Valve Assembly.>
Yes
Inspect the rele- Go to step 2.
vant DTC using
"List of Diagnostic
Trouble Code
(DTC)". <Ref. to
EN(H4SO
2.5)(diag)-69, List
of Diagnostic Trou-
ble Code (DTC).>
Replace the tum- Clean the tumble
ble generator valve generator valve.
assembly. <Ref. to
FU(H4SO 2.5)-28,
Tumble Generator
Valve Assembly.>
No
No