Body - Back Door Open/Key Detected in Vehicle Message

L-SB-0019-13

April 12, 2013

Warning Message Displayed While Driving

Service Category
Vehicle Exterior

Section
Door/Hatch

Market
USA





Applicability

Introduction

Some 2012-2013 model year RX350 or RX450h vehicles may display a "Back Door Open" or "Key Detected in Vehicle" warning message intermittently on the combination meter while the vehicle is in motion. This message may be triggered if the courtesy switch in the back door lock assembly intermittently changes to the door open position while the hatch is in the closed position. A new back door lock assembly is available to address this condition.

NOTE

This repair procedure applies ONLY to vehicles with an intermittent and difficult-to-reproduce condition. If the condition can be easily reproduced, the back door lock assembly may not be the root cause. Per the Repair Manual, two other vehicle subsystems may cause this condition or a condition similar to it: the combination meter or the main body ECU. Follow the appropriate Repair Manual procedures to diagnose those systems.





Warranty Information

Production Change Information





This bulletin applies to vehicles produced BEFORE the Production Change Effective VINs shown.





Parts Information





Required Tools & Equipment

Repair Procedure

1. Verify the concern as described in the Introduction. Is the condition easily reproduced?

^ YES - This bulletin does NOT apply. Two other vehicle subsystems may be the cause: combination meter or main body ECU. Continue diagnosis using the applicable Repair Manual.

^ NO - Continue to step 2.

2. Attempt to reproduce the condition ("Back Door Open" or "Key Detected in Vehicle" displays on the combination meter while vehicle is in motion). Open and close the rear hatch then test drive the vehicle.

NOTE

Verify that the rear hatch is fully closed before driving the vehicle.

3. Replace the back door lock assembly.





Refer to the Technical Information System (TIS) applicable model and model year Repair Manual:

4. Verify correct operation of the back door lock assembly.

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