Subaru Legacy (2005 year). Manual - part 1030

 

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Subaru Legacy (2005 year). Manual - part 1030

 

 

IM(diag)-25

IMMOBILIZER (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

F: DTC P1576 EGI CONTROL MODULE EEPROM

DTC DETECTING CONDITION:
ECM malfunctioning

1. REPLACE ECM.

Replace the ECM. <Ref. to FU(H4SO 2.0)-34, Engine Control Module (ECM).> <Ref. to FU(H4SO 2.5)-37,
Engine Control Module (ECM).> <Ref. to FU(H4DOTC)-34, Engine Control Module (ECM).> <Ref. to
FU(H6DO)-34, Engine Control Module (ECM).>
Perform the registration procedure next. Refer to “IMMOBILIZER TEACHING OPERATION MANUAL”.

G: DTC P1577 IMM CONTROL MODULE EEPROM

DTC DETECTING CONDITION:
Body integrated module malfunctioning

1. REPLACE BODY INTEGRATED MODULE

Replace the body integrated module <Ref. to SL-44, Body Integrated Module.> and replace all the ignition
keys (including transponder). Execute the registration procedure next. Refer to “IMMOBILIZER TEACHING
OPERATION MANUAL”.

H: DTC P1578 METER FAILURE

DTC DETECTING CONDITION:
Reference code incompatibility between body integrated module and combination meter

1. CHECK LAN COMMUNICATION SYSTEM

Inspect LAN communication system in the following situation. <Ref. to LAN(diag)-2, Basic Diagnostic Proce-
dure.>
• DTC of body integrated module B0300, B0301, B0302, B0111 or B0321 is displayed.
• “Er IU” or “Er LC” is displayed in odo/trip meter on combination meter.

2. REPLACE COMBINATION METER.

Perform the registration of immobilizer, (refer to “IMMOBILIZER TEACHING OPERATION MANUAL”.) and
the registration is completed normally, then if the engine does not start, replace the combination meter. <Ref.
to IDI-15, REMOVAL, Combination Meter.> Execute the re
gistration procedure of all immobilizer part (com-
bination meter and etc.) next. Refer to “IMMOBILIZER TEACHING OPERATION MANUAL”.

NOTE:
• When the combination meter has been replaced, be sure to perform the registration procedure of immo-
bilizer.
• Engine may not start when the combination meter which removed from the model with immobilizer to the
model without immobilizer. When installed wrong one, correct with the following procedure.

(1) Turn the ignition switch to OFF.
(2) Put back the combination meter. (Install the combination meter for the model without immobilizer.)
(3) Disconnect the ground cable from battery, and reconnect one minute later.
(4) Turn the ignition switch to START, and check that the engine starts.

• When the combination meter and body integrated module are replaced at a time, the registration proce-
dure cannot be performed. In this case, it is necessary to write an ID newly to body integrated module.

IM(diag)-26

IMMOBILIZER (DIAGNOSTICS)

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

LAN(diag)-2

LAN SYSTEM (DIAGNOSTICS)

Basic Diagnostic Procedure

1. Basic Diagnostic Procedure

A: PROCEDURE

1. WITH SUBARU SELECT MONITOR

CAUTION:
• Subaru Select Monitor is required for reading DTC, performing diagnosis and reading current data.
• Remove foreign matters (dust, water, oil, etc.) from the body integrated module connector during
removal and installation.
• For the model with immobilizer, registration of immobilizer may be needed after the replacement of
controller, etc. For detailed procedure, refer to “IMMOBILIZER TEACHING OPERATION MANUAL”.

NOTE:
• To check harness for broken wires or short circuits, shake trouble spot or connector.
• Check List for Interview <Ref. to LAN(diag)-3, Check List for Interview.>

Step

Check

Yes

No

1

CHECK PRE-INSPECTION.
1) Ask the customer when and how the trou-
ble occurred using interview check list. <Ref. to 
LAN(diag)-3, Check List for Interview.>
2) Check the display of communication error. 
(Combination meter, odo/trip meter)

Is communication error dis-
played?

Go to step 3.

Go to step 2.

2

BASIC INSPECTION
Check the components which might affect 
body control. <Ref. to LAN(diag)-5, INSPEC-
TION, General Description.>

Is the component that might 
influence the body control 
problem normal?

Go to step 3.

Repair or replace 
each component.

3

CHECK DTC.
1) Read the DTC. <Ref. to LAN(diag)-14, 
READ DIAGNOSTIC TROUBLE CODE (DTC), 
OPERATION, Subaru Select Monitor.>

NOTE:

If the communication function of the Subaru Se-
lect Monitor cannot be executed normally,
check the communication circuit. <Ref. to
LAN(diag)-30, COMMUNICATION FOR INI-
TIALIZING IMPOSSIBLE, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>

2) Record all DTCs and freeze frame data.

Is DTC displayed on Subaru 
Select Monitor?

Go to step 5.

Go to step 4.

4

PERFORM GENERAL DIAGNOSTICS.
Inspect using “General Diagnostics Table”. 
<Ref. to LAN(diag)-83, General Diagnostic 
Table.>

Is result of inspection OK?

LAN system is nor-
mal.

Go to step 5.

5

PERFORM DIAGNOSIS.
1) Correct the cause of trouble.
2) Perform clear memory mode. <Ref. to 
LAN(diag)-20, CLEAR MEMORY MODE, 
OPERATION, Subaru Select Monitor.>
3) Read the DTC. <Ref. to LAN(diag)-14, 
READ DIAGNOSTIC TROUBLE CODE (DTC), 
OPERATION, Subaru Select Monitor.>

Is DTC displayed on Subaru 
Select Monitor?

Repeat step 5 until 
DTC is not shown.

Finish the diagno-
sis.

 

 

 

 

 

 

 

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