Subaru B9 TRIBECA WX 2007 Manual page 555

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
IMMOBILIZER (DIAGNOSTICS)
E: DTC P1574 KEY COMMUNICATION FAILURE
DTC DETECTING CONDITION:
Failure of body integrated unit to verify key (transponder) ID code or transponder key failure
Step
1 CHECK BODY INTEGRATED UNIT FUNC-
TION.
Insert the key to ignition switch (LOCK position),
and measure the changes in voltage between
antenna connectors.
Connector & terminal
(B351) No. 1 (+) — Chassis ground (–):
2 CHECK IGNITION KEY (TRANSPONDER).
1) Remove the key from ignition switch.
2) Start the engine using other key which is
already registered.
F: DTC P1576 EGI CONTROL MODULE EEPROM
DTC DETECTING CONDITION:
• ECM malfunctioning
• Failed to access ROM inside ECM, while performing teaching operation on the keys.
Step
1 PERFORM TEACHING OPERATION OF IG-
NITION KEY.
Perform teaching operation on all keys of the
vehicle. Refer to the "REGISTRATION MAN-
UAL FOR IMMOBILIZER".
2 PERFORM TEACHING OPERATION OF IG-
NITION KEY.
Perform teaching operation on all keys of the
vehicle. Refer to the "REGISTRATION MAN-
UAL FOR IMMOBILIZER".
3 PERFORM TEACHING OPERATION OF IG-
NITION KEY.
Perform teaching operation on all keys of the
vehicle. Refer to the "REGISTRATION MAN-
UAL FOR IMMOBILIZER".
Check
Is the voltage –30 to 30 V?
(Approx. 0.1 second after
inserting the key) Is the voltage
0 V? (Approx. 1 second after
inserting the key)
Does the engine start?
Check
Is the teaching operation for all
keys completed?
Is the teaching operation for all
keys completed?
Is the teaching operation for all
keys completed?
IM(diag)-22
Yes No
Go to step 2.
Replace the body
integrated unit
<Ref. to SL-51,
Body Integrated
Unit.> and replace
all the ignition keys
(including tran-
sponder). Execute
the registration
procedure next.
Refer to the "REG-
ISTRATION MAN-
UAL FOR
IMMOBILIZER".
Replace all the Replace the body
ignition keys integrated unit
(including tran- <Ref. to SL-51,
sponder). Execute Body Integrated
the registration Unit.> and replace
procedure next. all the ignition keys
Refer to the "REG- (including tran-
ISTRATION MAN- sponder). Execute
UAL FOR the registration
IMMOBILIZER". procedure next.
Refer to the "REG-
ISTRATION MAN-
UAL FOR
IMMOBILIZER".
Yes No
Go to step 2.
Make sure it is pos-
sible to start the
engine with all keys
that have been
taught. This com-
pletes the work.
Make sure it is pos- Go to step 3.
sible to start the
engine with all keys
that have been
taught. This com-
pletes the work.
Make sure it is pos- Replace the ECM.
sible to start the <Ref. to
engine with all keys FU(H6DO)-33,
that have been Engine Control
taught. This com- Module (ECM).>
pletes the work.