ECU SUBARU FORESTER 1999 Service Owner's Manual

5. DIAGNOSTICS ITEM 4
5F51 : CHECK INPUT SIGNAL FOR
STARTER MOTOR.
1) Disconnect connector from starter motor.
2) Turn ignition switch to START.
3) Measure voltage between starter motor con-
nector (B14) and engine ground.
Connector & terminal
(B14) No. 1 (+) Ð Engine ground (þ):
OBD0100A
NOTE:
IOn AT vehicles, place the select lever in the P
or N position.
IOn MT vehicles, depress the clutch pedal.
:Is the voltage more than 10 V?
: Go to step5F52.
: Go to step5F53.
5F52 : CHECK GROUND CIRCUIT OF
STARTER MOTOR.
1) Turn ignition switch to OFF.
2) Disconnect terminal from starter motor.
3) Measure resistance between ground cable ter-
minal and engine ground.
:Is the resistance less than 5W?
: Check starter motor. [W100].>
: Repair or replace ground cable.
5F53 : CHECK FUSE.
Remove and visually check the fuse SBF-1 (in
main fuse box).
:Is fuse SBF-1 blown?
: Replace SBF fuse (80 A).
: Go to step5F54.5F54 : CHECK FUSE.
Remove and visually check the fuse SBF-4 (in
main fuse box).
:Is fuse SBF-4 blown?
: Replace SBF fuse (50 A).
: Go to step5F55.
5F55 : CHECK INTERRUPT RELAY.
1) Turn ignition switch to OFF.
2) Remove interrupt relay (behind the fuse box).
S6M0469
3) Check continuity between interrupt relay termi-
nals.
Terminals
No. 1 Ð No. 4:
B6M0992
:Does continuity exist?
: Go to step5F56.
: Replace interrupt relay.
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5. Security System

5F56 : CHECK INTERRUPT RELAY.
Check continuity between interrupt relay terminals.
Terminals
No. 2 Ð No. 6:
B6M0993
:Does continuity exist?
: Go to step5F57.
: Replace interrupt relay.
5F57 : CHECK INTERRUPT RELAY.
1) Connect the battery to interrupt relay terminals
No. 1 and No. 4.
2) Check continuity between interrupt relay termi-
nals.
Terminals
No. 2 Ð No. 6:
B6M0994
:Does continuity exist?
: Replace interrupt relay.
: Go to step5F58.5F58 : CHECK HARNESS CONNECTOR
BETWEEN BATTERY AND SECU-
RITY CONTROL MODULE.
1) Install the SBF-4 to main fuse box.
2) Install the interrupt relay.
3) Disconnect connector from security control
module.
4) Turn ignition switch to START.
5) Measure voltage between security control mod-
ule connector (B93) and chassis ground.
Connector & terminal
(B93) No. 15 (+) Ð Chassis ground (þ):
B6M0995A
:Is the voltage more than 10 V?
: Go to step5F59.
: Repair wiring harness between security
control module and battery.
5F59 : CHECK TRANSMISSION TYPE.
:Is the transmission type AT?
: Go to step5F510.
: Go to step5F513.
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5. Security System

5F510 : CHECK HARNESS CONNECTOR
BETWEEN INTERRUPT RELAY
AND INHIBITOR SWITCH.
1) Turn ignition switch to OFF.
2) Disconnect connector from inhibitor switch.
3) Turn ignition switch to START.
4) Measure voltage between inhibitor switch con-
nector (T7) and chassis ground.
Connector & terminal
(T7) No. 12 (+) Ð Chassis ground (þ):
B6M1425A
:Is the voltage more than 10 V?
: Go to step5F511.
: Repair wiring harness between interrupt
relay and inhibitor switch.
5F511 : CHECK INHIBITOR SWITCH.
1) Place the select lever in the P or N position.
2) Measure resistance between inhibitor switch
terminals.
Terminals
No. 7 Ð No. 12:
B6M1426
:Is the resistance less than 1W?
: Go to step5F512.
: Replace inhibitor switch. [W200].>5F512 : CHECK HARNESS BETWEEN
INHIBITOR SWITCH AND STARTER
MOTOR.
Measure resistance between inhibitor switch con-
nector (T7) and starter motor connector (B14).
Connector & terminal
(T7) No. 7 Ð (B14) No. 1:
B6M1427A
:Is the resistance less than 10W?
: Replace security control module. to 6-2 [W14A1].>
: Repair wiring harness between inhibitor
switch and starter motor.
5F513 : CHECK STARTER INTERLOCK
RELAY.
1) Turn ignition switch to OFF.
2) Remove starter interlock relay.
3) Check continuity between starter interlock relay
terminals.
Terminals
No. 3 Ð No. 2:
B6M1377
:Does continuity exist?
: Go to step5F514.
: Replace starter interlock relay.
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5. Security System

5F514 : CHECK STARTER INTERLOCK
RELAY.
Check continuity between starter interlock relay
terminals.
Terminals
No. 1 Ð No. 4:
B6M1378
:Does continuity exist?
: Replace starter interlock relay.
: Go to step5F515.
5F515 : CHECK STARTER INTERLOCK
RELAY.
1) Connect the battery to starter interlock relay ter-
minals No. 3 and No. 2.
2) Check continuity between starter interlock relay
terminals.
Terminals
No. 1 Ð No. 4:
B6M1379
:Does continuity exist?
: Go to step5F516.
: Replace starter interlock relay.5F516 : CHECK CLUTCH SWITCH.
1) Install starter interlock relay.
2) Measure resistance between clutch switch con-
nector (B106) and (B107) terminals while depress-
ing the clutch pedal.
Connector & terminal
With cruise control
(B107) No. 1 Ð No. 2:
Without cruise control
(B106) No. 1 Ð No. 2:
B2M0518A
:Is the resistance less than 10W?
: Go to step5F517.
: Replace clutch switch.
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5. Security System

5F517 : CHECK HARNESS BETWEEN
INTERRUPT RELAY AND STARTER
MOTOR.
1) Disconnect connector from starter motor.
2) Turn ignition switch to START.
3) Measure voltage between starter motor con-
nector (B14) and chassis ground while depressing
the clutch pedal.
Connector & terminal
(B14) No. 1 (+) Ð Chassis ground (þ):
B6M1002A
:Is the voltage more than 10 V?
: Replace security control module. to 6-2 [W14A1].>
: Repair wiring harness between interrupt
relay and starter motor.
6. DIAGNOSTICS ITEM 5
5F61 : CHECK HARNESS CONNECTOR
BETWEEN SECURITY CONTROL
MODULE AND COMBINATION
METER.
1) Disconnect connector from security control
module and combination meter.
2) Measure resistance between security control
module connector (B93) and combination meter
connector (i10).
Connector & terminal
(B93) No. 5 Ð (i10) No. 11:
S6M0465A
:Is the resistance less than 10W?
: Go to step5F62.
: Repair wiring harness between security
control module and combination meter.
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5. Security System

5F62 : CHECK HARNESS CONNECTOR
BETWEEN FRONT DOOR SWITCH
RH AND COMBINATION METER.
1) Disconnect connector from front door switch
RH.
2) Measure resistance between front door switch
RH connector (R12) and combination meter con-
nector (i10).
Connector & terminal
(R12) No. 1 Ð (i10) No. 11:
S6M0470A
:Is the resistance less than 10W?
: Go to step5F63.
: Repair wiring harness between front
door switch RH and combination meter.5F63 : CHECK COMBINATION METER CIR-
CUIT.
1) Remove combination meter.

2) Measure resistance between combination
meter terminals.
Terminals
No. 11 Ð No. 12:
S6M0468
:Is the resistance less than 10W?
: Replace security control module. to 6-2 [W14A1].>
: Repair or replace combination meter.

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5. Security System

7. DIAGNOSTIC ITEM 6
5F71 : CHECK HARNESS CONNECTOR
BETWEEN SECURITY CONTROL
MODULE AND COMBINATION
METER.
1) Disconnect connector from security control
module and combination meter.
2) Measure resistance between security control
module connector (B93) and combination meter
connector (i10).
Connector & terminal
(B93) No. 5 Ð (i10) No. 11:
S6M0465A
:Is the resistance less than 10W?
: Go to step5F72.
: Repair wiring harness between security
control module and combination meter.5F72 : CHECK HARNESS CONNECTOR
BETWEEN REAR DOOR SWITCH LH
AND COMBINATION METER.
1) Disconnect connector from rear door switch LH.
2) Measure resistance between rear door switch
LH connector (R22) and combination meter con-
nector (i10).
Connector & terminal
(R22) No. 1 Ð (i10) No. 11:
S6M0471A
:Is the resistance less than 10W?
: Go to step5F73.
: Repair wiring harness between rear
door switch LH and combination meter.
5F73 : CHECK COMBINATION METER CIR-
CUIT.
1) Remove combination meter. [W8A0].>
2) Measure resistance between combination
meter terminals.
Terminals
No. 11 Ð No. 12:
S6M0468
:Is the resistance less than 10W?
: Replace security control module. to 6-2 [W14A1].>
: Repair or replace combination meter.

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5. Security System

8. DIAGNOSTIC ITEM 7
5F81 : CHECK HARNESS CONNECTOR
BETWEEN SECURITY CONTROL
MODULE AND COMBINATION
METER.
1) Disconnect connector from security control
module and combination meter.
2) Measure resistance between security control
module connector (B93) and combination meter
connector (i10).
Connector & terminal
(B93) No. 5 Ð (i10) No. 11:
S6M0465A
:Is the resistance less than 10W?
: Go to step5F82.
: Repair wiring harness between security
control module and combination meter.5F82 : CHECK HARNESS CONNECTOR
BETWEEN REAR DOOR SWITCH RH
AND COMBINATION METER.
1) Disconnect connector from rear door switch
RH.
2) Measure resistance between rear door switch
RH connector (R16) and combination meter con-
nector (i10).
Connector & terminal
(R16) No. 1 Ð (i10) No. 11:
S6M0472A
:Is the resistance less than 10W?
: Go to step5F83.
: Repair wiring harness between rear
door switch RH and combination meter.
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5. Security System

5F83 : CHECK COMBINATION METER CIR-
CUIT.
1) Remove combination meter. [W8A0].>
2) Measure resistance between combination
meter terminals.
Terminals
No. 11 Ð No. 12:
S6M0468
:Is the resistance less than 10W?
: Replace security control module. to 6-2 [W14A1].>
: Repair or replace combination meter.

9. DIAGNOSTIC ITEM 8
5F91 : CHECK HARNESS CONNECTOR
BETWEEN REAR GATE LATCH
SWITCH AND SECURITY CONTROL
MODULE.
1) Disconnect connector from rear gate latch
switch and security control module.
2) Measure resistance between rear gate latch
switch connector (D46) and security control mod-
ule connector (B93).
Connector & terminal
(D46) No. 1 Ð (B93) No. 5:
S6M0473A
:Is the resistance less than 10W?
: Go to step5F92.
: Repair wiring harness between rear
gate latch switch and security control
module.
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5. Security System

5F92 : CHECK HARNESS CONNECTOR
BETWEEN REAR GATE LATCH
SWITCH AND CHASSIS GROUND.
Measure resistance between rear gate latch switch
connector (D46) and chassis ground.
Connector & terminal
(D46) No. 2 (+) Ð Chassis ground (þ):
B6M1010A
:Is the resistance less than 10W?
: Go to step5F93.
: Repair wiring harness between rear
gate latch switch and chassis ground.
5F93 : CHECK REAR GATE LATCH
SWITCH.
Measure resistance between rear gate latch switch
terminals.
Terminals
No. 1 Ð No. 2:
B6M1386
:Is the resistance less than 10W?
: Go to step5F94.
: Replace rear gate latch switch.5F94 : CHECK REAR GATE LATCH
SWITCH.
Measure resistance between rear gate latch switch
terminals while pushing the switch.
Terminals
No. 1 Ð No. 2:
B6M1386
:Is the resistance less than 10W?
: Replace rear gate latch switch.
: Replace security control module. to 6-2 [W14A1].>
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5. Security System