Subaru IMPREZA GD 2007 Series Manual page 164

asieps_tobira_IM_US.book 55 ページ ２０１２年１月１７日 火曜日 午後３時４８分
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 the 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 the 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 for poor contact of the ECM connector.
5 CHECK HARNESS BETWEEN ECM AND
TEST MODE CONNECTOR.
Measure the resistance of harness between
ECM and test mode connector.
Connector & terminal
(B135) No. 19 — (B75) No. 1:
6 CHECK POOR CONTACT.
Check for poor contact of the 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? Go to step 4.
Is there poor contact in ECM
connector?
Is the resistance less than 1 Ω? Go to step 6.
Is there poor contact in ECM
connector?
EN(H4SO)(diag)-55
ENGINE (DIAGNOSTICS)
Yes No
Go to step 2. Repair the mal-
function indicator
light circuit.
<Ref. to
EN(H4SO)(diag)-
51, 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.
Repair the open
circuit of harness
between test mode
connector and
ECM.
Repair poor con- Go to step 5.
tact of the ECM
connector.
Repair the open
circuit of harness
between ECM and
test mode connec-
tor.
Repair poor con- Replace the ECM.
tact of the ECM <Ref. to
connector. FU(H4SO)-39,
Engine Control
Module (ECM).>