Subaru IMPREZA 2002 Service Manual page 430

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Step
5 CHECK HARNESS BETWEEN ECM AND IN-
TAKE AIR TEMPERATURE 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 air temperature and pressure
sensor connector.
Connector & terminal
(8136) NO. 16
-
(E20) NO. 1:
B
CHECK HARNESS BETWEEN ECM AND IN-
TAKE AIR TEMPERATURE AND PRESSURE
SENSORCONNECTOR.
Measure the resistance of harness between
intake air temperature and pressure sensor
connector and engine ground.
Connector & terminal
(E20) No. 4
-
Engine ground:
IO CHECK POOR CONTACT.
Check poor contact in intake manifold pressure
sensor connector.
Check
I s
the resistance less than 1
Q?
I s
the resistance more than
500 kQ?
Is there poor contact in intake
manifold pressure sensor con-
nector?
Yes
20 to step 9.
30 to step 10.
qepair poor con-
act in intake air
emperature and
wessure sensor
:onnector.
No
Repair open circuit
in harness
between ECM and
intake air tempera-
ture and pressure
sensor connector.
Repair ground
short circuit in har-
ness between
ECM and intake
air temperature
and pressure sen-
sor connector.
Replace the intake
air temperature
and pressure sen-
sor. <Ref. to
Intake Air Temper-
ature and Pres-
sure Sensor.>
FU(S0HC)-34,
EN(S0HC)-106