Honda Civic manuals

Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc b28b6 pre-collision off switch

Subaru Legacy BN/BS (2015-2019) Service Manual / Eyesight (diagnostics) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc b28b6 pre-collision off switch

Detected when pre-collision brake OFF switch circuit is not installed, open-circuited or is stuck to ON.

DTC DETECTING CONDITION:

• Wiring of pre-collision brake OFF switch is not connected.

• Pre-collision brake OFF switch circuit is open.

• Pre-collision brake OFF switch circuit stays ON for 45 seconds or more.

TROUBLE SYMPTOM:

All functions of EyeSight system do not operate.

WIRING DIAGRAM:

EyeSight System EyeSight System > WIRING DIAGRAM

STEPCHECKYESNO

1.CHECK CURRENT DATA.

Confirm the current data «Pre-Collision Brake OFF SW Status (BIU)» of EyeSight using Subaru Select Monitor. Read Current Data

Does the display change according to ON/OFF operation of the pre-collision brake OFF switch-

Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

NOTE:

In this case, temporary poor contact of connector, or temporary open or short circuit of harness may be the cause.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B28B6 PRE-COLLISION OFF SWITCH

2.CHECK HARNESS.

1) Disconnect the stereo camera connector and the pre-collision brake OFF switch connector.

2) Using the tester, measure the resistance between the stereo camera connector and pre-collision brake OFF switch connector as well as chassis ground.

Connector & terminal

(i104) No. 6 — (i81) No. 30:

(i104) No. 8 — Chassis ground:

Is the resistance less than 1 --

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B28B6 PRE-COLLISION OFF SWITCH

Repair or replace an open circuit in harness between the stereo camera connector and pre-collision brake OFF switch connector.

3.CHECK HARNESS.

Using the tester, measure the resistance between the pre-collision brake OFF switch connector and chassis ground.

Connector & terminal

(i104) No. 6 — Chassis ground:

Is the resistance 1 M- or more-

Check the pre-collision brake OFF switch. Switches and Harness > INSPECTION

Repair or replace the short circuit to ground in harness between the stereo camera connector and pre-collision brake OFF switch connector.

Dtc b28b7 ldp off switch
Detected when lane departure warning OFF switch circuit is not installed, open-circuited, or is stuck to ON.DTC DETECTING CONDITION:• Wiring of lane departure warning OFF switch is not connected ...

Dtc b28b5 +b circuit open
Detected when there is an open circuit in power supply line.NOTE:Refer to DTC B2814 for diagnostic procedure. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2814 POWER SUPPLY LOW VOLT ...

Other materials:

Head restraint adjustment
Both the rear window side seats and the rear center seat are equipped with head restraints WARNING  Never drive the vehicle with the head restraints removed because they are designed to reduce the risk of serious neck injury in the event that the vehicle is struck ...

© 2017-2026 Copyright www.sulegacy.com