Subaru LEGACY 2006 Manual page 150

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
7 CHECK HARNESS BETWEEN ECM AND
MANIFOLD ABSOLUTE PRESSURE SEN-
SOR CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM.
3) Measure the resistance of harness
between ECM and manifold absolute pressure
sensor connector.
Connector & terminal
(B134) No. 6 — (E21) No. 1:
8 CHECK HARNESS BETWEEN ECM AND
MANIFOLD ABSOLUTE PRESSURE SEN-
SOR CONNECTOR.
Measure the resistance of harness between
ECM and manifold absolute pressure sensor
connector.
Connector & terminal
(B134) No. 29 — (E21) No. 2:
9 CHECK POOR CONTACT.
Check poor contact of manifold absolute pres-
sure sensor connector.
10 CHECK HARNESS BETWEEN ECM AND
MANIFOLD ABSOLUTE PRESSURE SEN-
SOR CONNECTOR.
1) Turn the ignition switch to OFF and Subaru
Select Monitor or the general scan tool switch
to OFF.
2) Disconnect the connector from manifold
absolute pressure sensor.
3) Turn the ignition switch to ON, and the Sub-
aru Select Monitor or general scan tool power
switch to ON.
4) Read the data of intake manifold absolute
pressure signal using Subaru Select Monitor or
general scan tool.
NOTE:
• Subaru Select Monitor
For detailed operation procedure, refer to
"READ CURRENT DATA FOR ENGINE". <Ref.
to EN(H4SO)(diag)-26, Subaru Select Moni-
tor.>
• General scan tool
For detailed operation procedure, refer to the
general scan tool operation manual.
Check
Is the resistance less than 1
Ω?
Is the resistance less than 1
Ω?
Is there poor contact in mani-
fold absolute pressure sensor
connector?
Is the measured value more
than 119.5 kPa (896.5 mmHg,
35.29 inHg) ?
EN(H4SO)(diag)-113
ENGINE (DIAGNOSTICS)
Yes No
Go to step 8. Repair the open
circuit of harness
between ECM and
manifold absolute
pressure sensor
connector.
Go to step 9. Repair the open
circuit of harness
between ECM and
manifold absolute
pressure sensor
connector.
Repair the poor Replace the mani-
contact of manifold fold absolute pres-
absolute pressure sure sensor. <Ref.
sensor connector. to FU(H4SO)-24,
Manifold Absolute
Pressure Sensor.>
Repair the battery Replace the mani-
short circuit of har- fold absolute pres-
ness between sure sensor. <Ref.
ECM and mani- to FU(H4SO)-24,
fold absolute pres- Manifold Absolute
sure sensor Pressure Sensor.>
connector.