Subaru Legacy 2002 Service Manual page 1327

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
Engine (DIAGNOSTICS)
No.
8 CHECK HARNESS BETWEEN ECM AND
INTAKE MANIFOLD PRESSURE SENSOR
CONNECTOR.
1) Turn ignition switch to OFF.
2) Disconnect connector from ECM.
3) Measure resistance of harness between
ECM and intake manifold pressure sensor
connector.
Connector & terminal
(B135) No. 19 — (E21) No. 2:
9 CHECK HARNESS BETWEEN ECM AND
INTAKE MANIFOLD PRESSURE SENSOR
CONNECTOR.
Measure resistance of harness between
intake manifold pressure sensor connector
and engine ground.
Connector & terminal
(E21) No. 1 — Engine ground:
10 CHECK POOR CONTACT.
Check poor contact in intake manifold pres-
sure sensor connector.
Step
Is the resistance less than
1 Ω?
Is the resistance more than
500 kΩ?
Is there poor contact in
intake manifold pressure
sensor connector?
EN(H6)-120
Check Yes
Go to step 9.
Go to step 10.
Repair poor con-
tact in intake
manifold pressure
sensor connector.
No
Repair open cir-
cuit in harness
between ECM
and intake mani-
fold pressure sen-
sor connector.
Repair ground
short circuit in
harness between
ECM and intake
manifold pressure
sensor connector.
Replace intake
manifold pressure
sensor. <Ref. to
FU(H6)-34, Intake
Manifold Pressure
Sensor.>