Subaru Crosstrek Service Manual: 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.

• Lane departure warning OFF switch circuit is open.

• Lane departure warning OFF switch circuit stays ON for 45 seconds or more.

1.CHECK CURRENT DATA.

Confirm the current data «Lane Departure OFF SW (BIU)» of EyeSight using Subaru Select Monitor. Read Current Data">

Does the display change according to the lane departure warning OFF switch ON/OFF operation?

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 B28B7 LDP OFF SWITCH">Go to Step 2.

2.CHECK HARNESS.

1) Disconnect the stereo camera connector and the lane departure warning OFF switch connector.

2) Using the tester, measure the resistance between the stereo camera connector and lane departure warning OFF switch connector as well as chassis ground.

Connector & terminal

(R406) No. 4 — (R137) No. 13:

(R406) No. 5 — Chassis ground:

Is the resistance less than 1 ??

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B28B7 LDP OFF SWITCH">Go to Step 3.

Repair or replace an open circuit in harness between the stereo camera connector and lane departure warning OFF switch connector.

3.CHECK HARNESS.

Using the tester, measure the resistance between the lane departure warning OFF switch connector and chassis ground.

Connector & terminal

(R406) No. 4 — Chassis ground:

Is the resistance 1 M? or more?

Check the lane departure warning OFF switch. Switches and Harness > INSPECTION">

Repair or replace the short circuit to ground in harness between the stereo camera connector and lane departure warning OFF switch connector.

Dtc b28b6 pre-collision off switch

Dtc b28b8 eyesight steering switch 1

Other materials:

Assembly
CONTROL SYSTEMS > Select LeverASSEMBLY1. Clean all the parts before assembly.2. Apply Multemp D or equivalent to the sliding portion of each part.3. Assemble in the reverse order of disassembly.NOTE:Insert the solenoid unit terminals to the harness connector.(A)Solenoid unit (color code: blue)(B) ...

Inspection
SECURITY AND LOCKS > Access KeyINSPECTION1. ACCESS KEY BATTERYCheck the access key battery voltage.Preparation tool:Circuit testerNOTE:Complete the measurement within 5 seconds because the battery discharges during measurement.Battery terminalInspection conditionsStandard(+) — (−)Connect ...

Select lever/gear position indicator (CVT models)
Type A Upshift indicator Downshift indicator Select lever/gear position indicator Type B Upshift indicator Downshift indicator Select lever/gear position indicator This indicator shows the position of the select lever. When the manual mode is selected, the gear pos ...