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Subaru Legacy Service Manual: Dtc b2285 steering lock position signal correlation

DTC DETECTING CONDITION:

When the steering lock position signal transmitted from the steering lock CM via solid line and the steering lock position signal transmitted via LIN communication system do not match.

TROUBLE SYMPTOM:

There are conditions when the steering lock is not released.

Engine will not start.

CAUTION:

For replacement procedure of keyless access CM and steering lock CM, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

WIRING DIAGRAM:

NOTE:

For the coupling connector, refer to “WIRING SYSTEM”.

Keyless access with push button start system Keyless Access With Push Button Start System > WIRING DIAGRAM

STEPCHECKYESNO

1.CHECK LAN SYSTEM.

Inspect LAN system. Basic Diagnostic Procedure > PROCEDURE

Is LAN system normal-

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2285 STEERING LOCK POSITION SIGNAL CORRELATION

Perform the inspection according to the diagnosis for LAN system.

2.CHECK DTC.

Read DTC using the Subaru Select Monitor. Read Diagnostic Trouble Code (DTC)

Is DTC B2785 displayed-

Perform inspection according to DTC B2785. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2785 LIN COMMUNICATION

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2285 STEERING LOCK POSITION SIGNAL CORRELATION

3.CHECK CURRENT DATA.

Check the current data display of «Keyless access with push button start» using Subaru Select Monitor. Read Current Data

When locked:

Lock side sensor status: ON

Unlock side sensor status: OFF

Lock confirmation: Confirmed

Unlock confirmation: Not confirmed

When unlocked:

Lock side sensor status: OFF

Unlock side sensor status: ON

Lock confirmation: Not confirmed

Unlock confirmation: Confirmed

NOTE:

To lock the steering lock, turn off the power, and open > close, or close > open the driver’s door. To unlock the steering lock, turn the ignition switch to ACC ON or IGN ON.

Are the readings as shown on the left according to the steering lock status-

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2285 STEERING LOCK POSITION SIGNAL CORRELATION

Replace the steering lock CM. Steering Lock CM > REMOVAL

4.CHECK CURRENT DATA.

Check the current data display of «Keyless access with push button start» using Subaru Select Monitor. Read Current Data

When locked:

Steering unlock switch: OFF

When unlocked:

Steering unlock switch: ON

NOTE:

To lock the steering lock, turn off the power, and open > close, or close > open the driver’s door. To unlock the steering lock, turn the ignition switch to ACC ON or IGN ON.

Are the readings as shown on the left according to the steering lock status-

Replace the keyless access CM. Keyless Access CM > REMOVAL

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2285 STEERING LOCK POSITION SIGNAL CORRELATION

5.CHECK FUSE.

Check the fuse. Relay and Fuse > INSPECTION

Is the fuse OK-

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2285 STEERING LOCK POSITION SIGNAL CORRELATION

Replace the fuse. When the replaced fuse is blown immediately, check the power supply circuit for short-circuited.

6.CHECK HARNESS.

1) Disconnect the keyless access CM connector.

2) Using a tester, measure the voltage between keyless access CM connectors.

Connector & terminal

(i75) No. 24 (+) — Chassis ground (−):

(i241) No. 40 (+) — Chassis ground (−):

Is the voltage 9.5 — 16 V-

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2285 STEERING LOCK POSITION SIGNAL CORRELATION

Check the power supply circuit.

7.CHECK HARNESS.

Using a tester, measure the resistance between the keyless access CM connector and chassis ground.

Connector & terminal

(i241) No. 21 — Chassis ground:

(i75) No. 1 — Chassis ground:

Is the resistance less than 1 --

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2285 STEERING LOCK POSITION SIGNAL CORRELATION

Repair or replace the open circuit of harness.

8.CHECK HARNESS.

Using a tester, measure the resistance between the steering lock CM connector and chassis ground.

Connector & terminal

(i47) No. 4 — Chassis ground:

Does the following occur- Steering lock: 10 k- or more > Steering unlock: less than 1 -

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2285 STEERING LOCK POSITION SIGNAL CORRELATION

Replace the steering lock CM. Steering Lock CM > REMOVAL

9.CHECK HARNESS.

1) Disconnect the keyless access CM connector.

2) Disconnect the steering lock CM connector.

3) Using a tester, measure the resistance between the keyless access CM connector and steering lock CM.

Connector & terminal

(i75) No. 21 — (i47) No. 4:

Is the resistance less than 1 --

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2285 STEERING LOCK POSITION SIGNAL CORRELATION

Repair or replace the open circuit of harness.

10.CHECK HARNESS.

Using a tester, measure the resistance between the keyless access CM connector and chassis ground.

Connector & terminal

(i75) No. 21 — Chassis ground:

Is the resistance 10 k- or more-

Replace the keyless access CM. Keyless Access CM > REMOVAL

Repair or replace the short circuit of the harness.

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