2004 SUBARU FORESTER Service Repair Manual

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Page 1153 of 2870

SUBARU FORESTER 2004 Service Repair Manual EN(H4SO)-55
ENGINE (DIAGNOSTIC)
Malfunction Indicator Light
F: MALFUNCTION INDICATOR LIGHT REMAINS BLINKING.
DIAGNOSIS:
Test mode connector circuit is shorted.
TROUBLE SYMPTOM:
Malfunction indicator l

Page 1154 of 2870

SUBARU FORESTER 2004 Service Repair Manual EN(H4SO)-56
ENGINE (DIAGNOSTIC)
Malfunction Indicator Light
Step Check Yes No
1 CHECK TEST MODE CONNECTOR.
1) Disconnect the test mode connectors
2) Turn the ignition switch to ON.Does the malfunction

Page 1155 of 2870

SUBARU FORESTER 2004 Service Repair Manual EN(H4SO)-57
ENGINE (DIAGNOSTIC)
Diagnostics for Engine Starting Failure
17.Diagnostics for Engine Starting Failure
A: PROCEDURE
1. Check for fuel amount.
↓
2. Inspection of starter motor circuit. <R

Page 1156 of 2870

SUBARU FORESTER 2004 Service Repair Manual EN(H4SO)-58
ENGINE (DIAGNOSTIC)
Diagnostics for Engine Starting Failure
B: STARTER MOTOR CIRCUIT
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO)-44, O

Page 1157 of 2870

SUBARU FORESTER 2004 Service Repair Manual EN(H4SO)-59
ENGINE (DIAGNOSTIC)
Diagnostics for Engine Starting Failure
Step Check Yes No
1 CHECK BATTERY.
Check the battery voltage.Is the voltage more than 12 V? Go to step 2.Charge or replace
the

EN(H4SO)-59
ENGINE (DIAGNOSTIC)
Diagnostics for Engine Starting Failure
Step Check Yes No
1 CHECK BATTERY.
Check the battery voltage.Is the voltage more than 12 V? Go to step 2.Charge or replace
the battery.
2 CHECK INPUT SIGNAL FOR STARTER MO-
TOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from starter
motor.
3) Turn the ignition switch to START.
4) Measure the power supply voltage between
starter motor connector terminal and engine
ground.
Connector & terminal
(B14) No. 1 (+) — Engine ground (
−):
N
OTE:
For AT model, shift the select lever to “P” or
“N” range.
For MT model, depress the clutch pedal.Is the voltage more than 10 V? Go to step 3.Go to step 4.
3 CHECK GROUND CIRCUIT OF STARTER
MOTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the ground cable terminal from
starter motor.
3) Measure the resistance of ground cable
between ground cable terminal and engine
ground.Is the resistance less than 5
Ω?Check the starter
motor. SC(H4SO)-6,
Starter.>Repair open circuit
of ground cable.
4 CHECK HARNESS BETWEEN BATTERY
AND IGNITION SWITCH CONNECTOR.
1) Disconnect the connector from ignition
switch.
2) Measure the power supply voltage between
ignition switch connector and chassis ground.
Connector & terminal
(B72) No. 1 (+) — Chassis ground (
−):Is the voltage more than 10 V? Go to step 5.Repair open circuit
in harness
between ignition
switch and bat-
tery, and check
fuse SBF No. 4
and SBF No. 1.
5 CHECK IGNITION SWITCH.
1) Disconnect the connector from ignition
switch.
2) Measure the resistance between ignition
switch terminals while turning the ignition
switch to START position.
Te r m i n a l s
No. 1 — No. 3:Is the resistance less than 5
Ω?Go to step 6.Replace the igni-
tion switch.
6 CHECK TRANSMISSION TYPE.Is the transmission type AT? Go to step 7.Temporary poor
contact occurs.
Check poor con-
tact in each con-
nectors.
7 CHECK INHIBITOR SWITCH INPUT VOLT-
AGE.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from inhibitor
switch.
3) Connect the connector to ignition switch.
4) Measure the input voltage between inhibitor
switch connector terminal and engine ground
while turning the ignition switch to START posi-
tion.
Connector & terminal
(B12) No. 12 (+) — Engine ground (
−):Is the voltage more than 10 V? Go to step 8.Repair open or
ground short cir-
cuit in harness
between inhibitor
switch and ignition
switch.
N
OTE:
Check security sys-
tem (if equipped).

Page 1158 of 2870

SUBARU FORESTER 2004 Service Repair Manual EN(H4SO)-60
ENGINE (DIAGNOSTIC)
Diagnostics for Engine Starting Failure
8 CHECK INHIBITOR SWITCH.
1) Shift the select lever in the “P” or “N” range.
2) Measure the resistance between inhibitor

Page 1159 of 2870

SUBARU FORESTER 2004 Service Repair Manual EN(H4SO)-61
ENGINE (DIAGNOSTIC)
Diagnostics for Engine Starting Failure
C: CHECK POWER SUPPLY AND GROUND LINE OF ENGINE CONTROL MOD-
ULE (ECM)
CAUTION:
After repair or replacement of faulty parts, con

Page 1160 of 2870

SUBARU FORESTER 2004 Service Repair Manual EN(H4SO)-62
ENGINE (DIAGNOSTIC)
Diagnostics for Engine Starting Failure
Step Check Yes No
1 CHECK MAIN RELAY.
1) Turn the ignition switch to OFF.
2) Remove the main relay.
3) Connect the battery to ma

EN(H4SO)-62
ENGINE (DIAGNOSTIC)
Diagnostics for Engine Starting Failure
Step Check Yes No
1 CHECK MAIN RELAY.
1) Turn the ignition switch to OFF.
2) Remove the main relay.
3) Connect the battery to main relay terminals
No. 1 and No. 2.
4) Measure the resistance between main relay
terminals.
Te r m i n a l s
No. 3 — No. 5:
No. 4 — No. 6:Is the resistance less than 10
Ω?Go to step 2.Replace the main
relay.
2 CHECK GROUND CIRCUIT FOR ECM.
1) Disconnect the connector from ECM.
2) Measure the resistance of harness
between ECM and chassis ground.
Connector & terminal
(B134) No. 7 — Chassis ground:
(B134) No. 35 — Chassis ground:
(B135) No. 21 — Chassis ground:
(B136) No. 5 — Chassis ground:
(B136) No. 16 — Chassis ground:
(B136) No. 19 — Chassis ground: (MT
model)
(B136) No. 26 — Chassis ground:
(B137) No. 14 — Chassis ground:Is the resistance less than 5
Ω?Go to step 3.Repair open circuit
in harness
between ECM
connector and
engine ground ter-
minal.
3 CHECK INPUT VOLTAGE OF ECM.
Measure the voltage between ECM connector
and chassis ground.
Connector & terminal
(B135) No. 9 (+) — Chassis ground (
−):Is the voltage more than 10 V? Go to step 4.Repair open or
ground short cir-
cuit of power sup-
ply circuit.
4 CHECK INPUT VOLTAGE OF ECM.
1) Turn the ignition switch to ON.
2) Measure the voltage between ECM con-
nector and chassis ground.
Connector & terminal
(B136) No. 10 (+) — Chassis ground (
−):Is the voltage more than 10 V? Go to step 5.Repair open or
ground short cir-
cuit of power sup-
ply circuit.
5 CHECK HARNESS BETWEEN ECM AND
MAIN RELAY CONNECTOR.
1) Turn the ignition switch to OFF.
2) Measure the resistance between ECM and
chassis ground.
Connector & terminal
(B136) No. 12 — Chassis ground:Is the resistance more than 1
MΩ?Go to step 6.Repair ground
short circuit in har-
ness between
ECM connector
and main relay
connector, then
replace the ECM.
6 CHECK OUTPUT VOLTAGE FROM ECM.
1) Connect the connector to ECM.
2) Turn the ignition switch to ON.
3) Measure the voltage between ECM con-
nector and chassis ground.
Connector & terminal
(B136) No. 12 (+) — Chassis ground (
−):Is the voltage more than 10 V? Go to step 7.Replace the ECM.
FU(H4SO)-44,
Engine Control
Module (ECM).>
7 CHECK INPUT VOLTAGE OF MAIN RELAY.
Measure the voltage between main relay con-
nector and chassis ground.
Connector & terminal
(B47) No. 2 (+) — Chassis ground (
−):Is the voltage more than 10 V? Go to step 8.Repair open circuit
in harness
between ECM
connector and
main relay connec-
tor.

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