Subaru Legacy 2002 Service Manual page 3365

DIAGNOSTICS CHART WITH TROUBLE CODE (DTC)
Immobilizer (Diagnostics)
D: DTC P0153 INCORRECT IMMOBILIZER KEY (USE OF UNREGISTERED
KEY)
S009811H48
DIAGNOSIS:
¼ Use of unregistered key in IMM ECM
No.
1 PERFORM TEACHING OPERATION ON
IGNITION KEY.
Perform teaching operation on all keys of the
vehicle. Refer to teaching operation manual
(Pub. No. S0820GZ).
2 PERFORM TEACHING OPERATION ON
IGNITION KEY.
Perform teaching operation on all keys with
vehicle. Refer to teaching operation manual
(Pub. No. S0820GZ).
E: DTC P1576 EGI CONTROL MODULE EEPROM
DIAGNOSIS:
¼ ECM malfunctioning
1. REPLACE ECM.
Replace ECM.
<Ref. to FU-51, Engine Control Module.>
<Ref. to FU(w/oOBD)-45, Engine Control Module.>
<Ref. to FU(H6)-47, Engine Control Module.>
Then perform teaching operation. Refer to teaching operation manual (Pub. No. S0820GZ).
F: DTC P1577 IMM CONTROL MODULE EEPROM
DIAGNOSIS:
¼ IMM ECM malfunctioning
1. REPLACE IMM ECM.
Replace IMM ECM <Ref. to SL-35, Immobilizer Control Module.> and then replace all ignition keys (includ-
ing the transponder). Then perform teaching operation. Refer to teaching operation manual (Pub. No.
S0820GZ).
Step
S009811H4901
S009811H5001
Check
Is teaching operation for all
keys completed?
Is teaching operation for all
keys completed?
S009811H49
S009811H50
IM-20
Yes
END Replace all igni-
tion keys (includ-
ing the transpon-
der). Go to step 2.
END Replace IMM
ECM <Ref. to
SL-35, Immobi-
lizer Control Mod-
ule.> and then
replace all ignition
keys (including
the transponder).
Then perform
teaching opera-
tion. Refer to
teaching operation
manual (Pub. No.
S0820GZ).
No