EN(H4DOTC)(diag)-336
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
Check
Yes
No
1
CHECK CURRENT DATA.
1) Start the engine.
2) Read the value of «TGV Position Sensor L»
using the Subaru Select Monitor.
NOTE:
For detailed operation procedures, refer to
“READ CURRENT DATA FOR ENGINE”. <Ref.
to EN(H4DOTC)(diag)-40, Subaru Select Moni-
tor.>
Is the value of «TGV Position
Sensor L» 5 V or more?
Go to step
2.
Even if DTC is
detected, the cir-
cuit has returned to
a normal condition
at this time. Repro-
duce the failure,
and then perform
the diagnosis
again.
NOTE:
In this case, tem-
porary poor con-
tact of connector,
temporary open or
short circuit of har-
ness may be the
cause.
2
CHECK HARNESS BETWEEN ECM AND
TUMBLE GENERATOR VALVE ASSEMBLY
LH CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from tumble gen-
erator valve assembly LH.
3) Start the engine.
4) Read the value of «TGV Position Sensor L»
using the Subaru Select Monitor.
NOTE:
For detailed operation procedures, refer to
“READ CURRENT DATA FOR ENGINE”. <Ref.
to EN(H4DOTC)(diag)-40, Subaru Select Moni-
tor.>
Is the value of «TGV Position
Sensor L» 5 V or more?
Repair the short
circuit to power in
harness between
ECM connector
and tumble gener-
ator valve assem-
bly LH connector.
Go to step
3.
3
CHECK HARNESS BETWEEN ECM AND
TUMBLE GENERATOR VALVE ASSEMBLY
LH CONNECTOR.
1) Turn the ignition switch to OFF.
2) Measure the resistance of harness between
tumble generator valve assembly LH connector
and engine ground.
Connector & terminal
(E51) No. 2 — Engine ground:
Is the resistance less than 5 Ω? Go to step
4.
Repair the harness
and connector.
NOTE:
In this case, repair
the following item:
• Open circuit in
harness between
ECM
connector
and tumble gener-
ator valve assem-
bly LH connector
• Poor contact of
ECM connector
• Poor contact of
coupling connector
4
CHECK FOR POOR CONTACT.
Check for poor contact of tumble generator
valve assembly LH connector.
Is there poor contact of the tum-
ble generator valve assembly
LH connector?
Repair the poor
contact of tumble
generator valve
assembly LH con-
nector.
Replace the tum-
ble generator valve
assembly LH.
<Ref. to FU(STI)-
48, Tumble Gener-
ator Valve Assem-
bly.> <Ref. to
FU(w/o STI)-48,
Tumble Generator
Valve Assembly.>