Subaru Legacy 2004 Service Manual page 4060

Diagnostics Chart for Immobilizer Indicator Light
IMMOBILIZER (DIAGNOSTICS)
Step
1 CHECK IMMOBILIZER WARNING LIGHT.
1) Turn the ignition switch to OFF.
2) Disconnect the harness connector from
body integrated unit.
3) Connect the resistor (100 ") between body
integrated unit harness connector terminal
(i84) No. 33 and chassis ground.
2 CHECK BODY INTEGRATED UNIT GROUND
CIRCUIT.
Measure the resistance between body inte-
grated unit harness connector terminal and
chassis ground.
Connector & terminal
(B280) No. 22 — Chassis ground:
(B281) No. 8, No. 9 — Chassis ground:
3 CHECK BODY INTEGRATED UNIT IGNITION
CIRCUIT.
1) Turn the ignition switch to ON. (engine
OFF)
2) Measure the voltage between body inte-
grated unit harness connector terminal and
chassis ground.
Connector & terminal
(i84) No. 1 (+) — Chassis ground (
4 CHECK BODY INTEGRATED UNIT POWER
SUPPLY CIRCUIT.
1) Turn the ignition switch to OFF.
2) Measure the voltage between body inte-
grated unit harness connector terminal and
chassis ground.
Connector & terminal
(B280) No. 7 (+) — Chassis ground (
(B281) No. 2 (+) — Chassis ground (
5 CHECK COMBINATION METER CIRCUIT.
1) Remove the combination meter. <Ref. to
IDI-16, Combination Meter Assembly.>
2) Measure the voltage between the combina-
tion meter harness connector terminal and
chassis ground.
Connector & terminal
(i10) No. 1, No. 2 (+) — Chassis ground (
6 CHECK COMBINATION METER CIRCUIT.
Measure the resistance between body inte-
grated unit harness connector terminal and
combination meter harness connector termi-
nal.
Connector & terminal
(i84) No. 33 — (i10) No. 17:
Check
Does the immobilizer indicator
light illuminate?
Is the resistance less than 10
"?
Is the voltage more than 10 V? Go to step 4.
#
):
Is the voltage more than 10 V? Replace the body
#
):
#
):
Is the voltage more than 10 V? Go to step 6.
#
):
Is the resistance less than 10
"?
IM(diag)-12
Yes
Go to step 2. Go to step 5.
Go to step 3. Repair the open
circuit of body inte-
grated unit ground
circuit.
Check the harness
for open or short
circuit between
body integrated
unit and ignition
switch.
Check the harness
integrated unit for open or short
<Ref. to SL-46, circuit between
Body Integrated body integrated
Unit.> and replace unit and fuse.
the all ignition keys
(including tran-
sponder). Execute
the registration
procedure next.
Refer to "REGIS-
TRATION MAN-
UAL FOR
IMMOBILIZER".
Check the harness
for open or short
circuit between
combination meter
and fuse.
LED bulb malfunc- Repair the har-
tion. Replace the ness/connector.
combination meter
case assembly.
<Ref. to IDI-17,
DISASSEMBLY,
Combination
Meter Assembly.>
No