Subaru Forester 2004 Service Manual page 52

Step
1 CHECK STATUS OF MALFUNCTION INDI-
CATOR LIGHT.
1) Turn the ignition switch to OFF.
2) Disconnect the test mode connectors.
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 connector from ECM.
3) Turn the ignition switch to ON.
3 CHECK HARNESS BETWEEN TEST MODE
CONNECTOR AND CHASSIS GROUND.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM.
3) Measure the resistance of harness
between test mode connector and chassis
ground.
Connector & terminal
(B76) No. 1 — Chassis ground:
4 CHECK POOR CONTACT.
Check poor contact in 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 chassis ground.
Connector & terminal
(B137) No. 15 — Chassis ground:
6 CHECK POOR CONTACT.
Check poor contact in ECM connector.
Malfunction Indicator Light
Does malfunction indicator
light illuminate?
Does 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(H4DOTC 2.5)-51
Check
Go to step 2.
Repair ground
short circuit in har-
ness between com-
bination meter and
ECM connector.
Go to step 4.
Repair the poor
contact in ECM
connector.
Go to step 6.
Repair the poor
contact in ECM
connector.
ENGINE (DIAGNOSTIC)
Yes No
Repair the malfunc-
tion indictor light cir-
cuit. <Ref. to
EN(H4DOTC 2.5)-
47, MALFUNC-
TION INDICA-
TOR LIGHT
DOES NOT
COME ON, Mal-
function Indicator
Light.>
Go to step 3.
Repair the harness
and connector.
NOTE:
In this case repair
the following:
• Open circuit in
harness between
test mode connec-
tor and chassis
ground
Go to step 5.
Repair open circuit
in harness between
ECM and test
mode connector.
Replace the ECM.
<Ref. to
FU(H4DOTC 2.5)-
41, Engine Con-
trol Module
(ECM).>