Subaru Legacy 2003 Service Manual page 1925

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
7 CHECK HARNESS BETWEEN ECM AND
PRESSURE SENSOR CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM.
3) Measure the resistance of harness
between ECM and intake manifold pres-
sure sensor connector.
Connector & terminal
(B135) No. 19 — (E21) No. 2:
Is the measured value less than the speci-
fied value?
8 CHECK HARNESS BETWEEN ECM AND
PRESSURE SENSOR CONNECTOR.
Measure the resistance of harness between
intake manifold pressure sensor connector and
engine ground.
Connector & terminal
(E21) No. 1 — Engine ground:
Does the measured value exceed the specified
value?
9 CHECK POOR CONTACT.
Check poor contact in pressure sensor con-
nector.
Is there poor contact in pressure sensor con-
nector?
Step
EN(H4DOSTC)-86
Value
1 Ω
1 MΩ
There is poor contact.
Yes
Go to step 8. Repair the open
circuit in harness
between ECM and
intake manifold
pressure sensor
connector.
Go to step 9. Repair the ground
short circuit in har-
ness between
ECM and intake
manifold pressure
sensor connector.
Repair the poor Replace the pres-
contact in pres- sure sensor. <Ref.
sure sensor con- to FU(H4DOSTC)-
nector. 34, Pressure Sen-
sor.>
No