EN(H4DOTC)(diag)-260
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
Check
Yes
No
1
CHECK CURRENT DATA.
1) Turn the ignition switch to ON.
2) Read the value of «Atmosphere Pressure»
using the Subaru Select Monitor or a general
scan tool.
NOTE:
• Subaru Select Monitor
For detailed operation procedures, refer to
“READ CURRENT DATA FOR ENGINE”. <Ref.
to EN(H4DOTC)(diag)-40, Subaru Select Moni-
tor.>
• General scan tool
For detailed operation procedures, refer to the
general scan tool operation manual.
Is the value in «Atmosphere
Pressure» 125 kPa (938
mmHg, 36.9 inHg) 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
LEAK CHECK VALVE ASSEMBLY CONNEC-
TOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM and
the leak check valve assembly.
3) Measure the resistance of harness between
ECM connector and the leak check valve
assembly connector.
Connector & terminal
(B136) No. 21 — (R400) No. 7:
(B135) No. 30 — (R400) No. 8:
Is the resistance less than 1 Ω? Go to step
3.
Repair the harness
and connector.
NOTE:
In this case, repair
the following item:
• Open circuit in
harness between
ECM
connector
and the leak check
valve
assembly
connector
• Poor contact of
coupling connector
• Poor contact of
joint connector
3
CHECK FOR POOR CONTACT.
Check for poor contact of ECM and the leak
check valve assembly connector.
Is there poor contact in ECM
and the leak check valve
assembly connector?
Repair the poor
contact of ECM
and the leak check
valve assembly
connector.
Go to step
4.
4
CHECK LEAK CHECK VALVE ASSEMBLY.
Check the pressure sensor of the leak check
valve assembly. <Ref. to EC(STI)-21, CHECK
PRESSURE SENSOR, INSPECTION, Leak
Check Valve Assembly.> <Ref. to EC(w/o STI)-
22, CHECK PRESSURE SENSOR, INSPEC-
TION, Leak Check Valve Assembly.>
Is the pressure sensor of the
leak check valve assembly
OK?
Repair the short
circuit to power in
harness between
ECM connector
and leak check
valve assembly
connector.
Replace the leak
check valve
assembly. <Ref. to
EC(STI)-19, Leak
Check Valve
Assembly.> <Ref.
to EC(w/o STI)-20,
Leak Check Valve
Assembly.>