Subaru LEGACY 2006 Manual page 378

asieps_tobira.book 52 ページ ２００９年１０月２６日 月曜日 午前９時１６分
ENGINE (DIAGNOSTICS)
Step
1 CHECK STATUS OF MALFUNCTION INDI-
CATOR LIGHT.
1) Turn the ignition switch to OFF.
2) Disconnect the test mode connector.
3) Turn the ignition switch to ON. (engine
OFF)
2 CHECK HARNESS BETWEEN COMBINA-
TION METER AND ECM CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM.
3) Turn the ignition switch to ON.
3 CHECK HARNESS BETWEEN TEST MODE
CONNECTOR AND ECM.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM.
3) Measure the resistance of harness
between test mode connector and ECM.
Connector & terminal
(B76) No. 1 — (B136) No. 6:
4 CHECK POOR CONTACT.
Check poor contact of ECM connector.
5 CHECK HARNESS BETWEEN ECM AND
TEST MODE CONNECTOR.
1) Connect the test mode connector.
2) Measure the resistance of harness
between ECM and test mode connector.
Connector & terminal
(B135) No. 27 — (B136) No. 6:
6 CHECK POOR CONTACT.
Check poor contact of ECM connector.
Malfunction Indicator Light
Check
Does the malfunction indicator
light illuminate?
Does the malfunction indicator
light illuminate?
Is the resistance less than 1
Ω?
Is there poor contact in ECM
connector?
Is the resistance less than 1
Ω?
Is there poor contact in ECM
connector?
EN(H4SO)(diag)-52
Yes No
Go to step 2. Repair the mal-
function indicator
light circuit. <Ref.
to
EN(H4SO)(diag)-
48, MALFUNC-
TION INDICATOR
LIGHT DOES NOT
COME ON, Mal-
function Indicator
Light.>
Go to step 3.
Repair the short
circuit of harness
between combina-
tion meter and
ECM connector.
Go to step 4. Repair the har-
ness and connec-
tor.
NOTE:
In this case, repair
the following item:
• Open circuit of
harness between
test mode connec-
tor and chassis
ground
Go to step 5.
Repair the poor
contact of ECM
connector.
Go to step 6.
Repair the open
circuit of harness
between ECM and
test mode connec-
tor.
Repair the poor Replace the ECM.
contact of ECM <Ref. to
connector. FU(H4SO)-36,
Engine Control
Module (ECM).>