Subaru Outback (BR): Immobilizer (Diagnostics)

Basic Diagnostic Procedure

A: PROCEDURE

General Description

A: CAUTION

CAUTION:

• Do not use electrical test devices on any airbag system wiring harnesses and connector circuits.
• Be careful not to damage the airbag system wiring harness.
• While diagnostic items are being checked, do not operate radios, portable telephones, etc. which emit electromagnetic waves near or inside the vehicle.

• When turning the ignition switch to ON or OFF while diagnostic items are being checked, do not allow keys with different ID codes close to the ignition switch. If the ignition key is on a key holder, remove it from the key holder before performing diagnoses.

• When repeatedly turning the ignition switch to ON or OFF while diagnostic items are being checked, it should be switched in cycles of "ON" for at least 5 seconds → "OFF" for at least 8 seconds.

1. Ignition switch position
2. Sec.

• If the engine fails to start with a registered ignition key, detach the ignition key from ignition switch and wait for approx. 1 second until security indicator light begins to flash. And then start the engine again.
• Before performing the diagnostics, obtain all keys for the vehicle from the owner.
• Do not install or register a body integrated unit already registered to another vehicle to diagnose failures or inspect functions.

B: PREPARATION TOOL

1. SPECIAL TOOL

2. GENERAL TOOL

Electrical Component Location

A: LOCATION

1. Antenna
2. Security indicator light (LED bulb)
3. Body integrated unit
4. Transponder
5. Security control module (only for Canada models)

Immobilizer Control Module I/ O Signal

A: WIRING DIAGRAM

1. IMMOBILIZER

<Ref. to WI-176, WIRING DIAGRAM, Immobilizer System.>

Subaru Select Monitor

A: OPERATION

1. HOW TO USE THE SUBARU SELECT MONITOR

For the operation procedure, refer to the "PC application help for Subaru Select Monitor".

2. READ DIAGNOSTIC TROUBLE CODE (DTC) FOR ENGINE AND BODY INTEGRATED UNIT

Refer to "Read Diagnostic Trouble Code" for information about how to indicate DTC. <Ref. to IM(diag)- 9, Read Diagnostic Trouble Code (DTC).>

3. COMMUNICATION LINE CHECK

The communication line between ECM and body integrated unit can be checked in "System Operation Check Mode". This is referred to as "Communication line check".

For the operation procedure, refer to the "PC application help for Subaru Select Monitor".

NOTE: If a problem is detected, repair the trouble cause.

<Ref. to IM(diag)-20, DTC P1572 IMM CIRCUIT FAILURE (EXCEPT ANTENNA CIRCUIT), Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

Read Diagnostic Trouble Code (DTC)

A: OPERATION

1. ECM

For the operation procedure, refer to the "PC application help for Subaru Select Monitor".

NOTE: For detailed concerning DTC, refer to the List of Diagnostic Trouble Codes (DTC). <Ref. to IM(diag)- 14, LIST, List of Diagnostic Trouble Code (DTC).>

2. BODY INTEGRATED UNIT

For the operation procedure, refer to the "PC application help for Subaru Select Monitor".

NOTE: For detailed concerning DTC, refer to the List of Diagnostic Trouble Codes (DTC). <Ref. to IM(diag)- 14, LIST, List of Diagnostic Trouble Code (DTC).>

Clear Memory Mode

A: OPERATION

1. ECM

For the operation procedure, refer to the "PC application help for Subaru Select Monitor".

NOTE: Initial diagnosis of electronic throttle control is performed after memory clearance. Wait for 10 seconds or more after turning the ignition switch to ON, and then start the engine.

2. BODY INTEGRATED UNIT

For the operation procedure, refer to the "PC application help for Subaru Select Monitor".

Diagnostics Chart for Security Indicator Light

A: INSPECTION

1. CHECK SECURITY INDICATOR LIGHT CIRCUIT

WIRING DIAGRAM:

2. CHECK KEY SWITCH CIRCUIT

WIRING DIAGRAM:

List of Diagnostic Trouble Code (DTC)

A: LIST

1. ECM

NOTE: Perform diagnosis of engine DTC when a DTC other than an immobilizer DTC is detected. <Ref. to EN(H4SO)(diag)-78, List of Diagnostic Trouble Code (DTC).> <Ref. to EN(H4DOTC)(diag)-75, List of Diagnostic Trouble Code (DTC).> <Ref. to EN(H6DO)(diag)-85, List of Diagnostic Trouble Code (DTC).>

2. BODY INTEGRATED UNIT

NOTE: The starter relay control is performed in immobilizer system. When the body integrated unit detects a nonconformity of reference code, it immediately outputs a starter relay cut signal to ECM, and then ECM stops the starter relay operation. In this case, engine does not start, and DTC is not recorded in ECM. Check that the engine does not start on the DTC of body integrated unit.

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

A: DTC P0513 INCORRECT IMMOBILIZER KEY

DTC DETECTING CONDITION:

Incorrect immobilizer key (Use of unregistered key in body integrated unit)

B: DTC P1570 ANTENNA

DTC DETECTING CONDITION:

Faulty antenna

WIRING DIAGRAM:

C: DTC P1571 REFERENCE CODE INCOMPATIBILITY

DTC DETECTING CONDITION:

Reference code incompatibility between body integrated unit and ECM

D: DTC P1572 IMM CIRCUIT FAILURE (EXCEPT ANTENNA CIRCUIT)

DTC DETECTING CONDITION:

Communication failure between body integrated unit and ECM

WIRING DIAGRAM:

NOTE: Refer to the following inspection when DTC is detected after inspection above. <Ref. to IM(diag)-24, DTC P1578 METER FAILURE, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

E: DTC P1574 KEY COMMUNICATION FAILURE

DTC DETECTING CONDITION:

Communication failure between key and body integrated unit

F: DTC P1576 EGI CONTROL MODULE EEPROM

DTC DETECTING CONDITION:

• ECM malfunctioning
• Inaccessible ROM in ECM during key registration.

G: DTC P1577 IMM CONTROL MODULE EEPROM

DTC DETECTING CONDITION:

• Body integrated unit malfunctioning
• Failed to access ROM inside the body integrated unit.

H: DTC P1578 METER FAILURE

DTC DETECTING CONDITION:

• Except Canada models

Reference code incompatibility between combination meter and body integrated unit or communication failure between body integrated unit and ECM

• Canada models

Reference code incompatibility between security control module and body integrated unit or communication failure between body integrated unit and ECM

NOTE: When the combination meter and body integrated unit are replaced at a time, the immobilizer can not be registered.

In this case, it is necessary to rewrite the ID into the body integrated unit.

I: DTC B1401 M COLLATION NG

NOTE: Refer to DTC P1578 "Meter Failure" for diagnostic procedure. <Ref. to IM(diag)-24, DTC P1578 METER FAILURE, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

J: DTC B1402 IMMOBILIZER KEY COLLATION NG

NOTE: Refer to the following inspections for diagnostic procedure.

• DTC P0513 "Incorrect Immobilizer Key"<Ref. to IM(diag)-16, DTC P0513 INCORRECT IMMOBILIZER KEY, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
• DTC P1570 "Antenna"<Ref. to IM(diag)-17, DTC P1570 ANTENNA, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
• DTC P1574 "Key Communication Failure"<Ref. to IM(diag)-22, DTC P1574 KEY COMMUNICATION FAILURE, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

K: DTC B1403 E/G REQUEST NG

NOTE: Refer to DTC P1572 "IMM Circuit Failure (Except Antenna Circuit)" for diagnostic procedure. <Ref. to IM(diag)- 20, DTC P1572 IMM CIRCUIT FAILURE (EXCEPT ANTENNA CIRCUIT), Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

L: DTC B1405 SCU COLLATION NG

DTC DETECTING CONDITION:

Reference code incompatibility between security control module and body integrated unit

M: DTC B1406 SCU_EEPROM_NG

DTC DETECTING CONDITION:

• Defective security control module
• ROM of security control module cannot be accessed

NOTE: When the security control module and body integrated unit are replaced at a time, the immobilizer can not be registered. In this case, it is necessary to rewrite the ID into the body integrated unit.

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