Keyless Systems - Smart Key(R) Inoperative From Front Doors

L-TCI-3161

July 30 2012

SMART ACCESS INOPERATIVE FROM FRONT DOOR

Service Category
Vehicle Interior

Section
Theft Deterrent/Keyless Entry

Market
Canada





APPLICABILITY:

INTRODUCTION:

Some 2007 - 2010 ES350 vehicles may exhibit a condition where the Smart Key system is inoperative when attempting to access the vehicle from either the driver or passenger front door. The door handle inner plastic frame has been improved to prevent Smart Key system malfunction. This bulletin provides diagnostic and repair information to address this condition.

PRODUCTION CHANGE INFORMATION:





This TSB applies to vehicles produced BEFORE the Production Change Effective VIN shown.





WARRANTY INFORMATION:






PARTS INFORMATION:






REQUIRED TOOLS & EQUIPMENT:

INSPECTION PROCEDURE:

NOTE:

This Inspection Procedure will help identify a potential cause of a given Smart Key system malfunction. If the Smart Key system Data List cannot be accessed, the Certification ECU may be inoperative due to a door handle wire harness condition. Disconnecting a given handle to remove a potential short circuit may be necessary to determine the health of the Certification ECU.

1. Check Smart key operation from both front doors to confirm the following:

A. Unlock function from touch sensor inside pull handle.

B. Lock function when pushing black button on outside of handle.





2. Once the specific malfunction is confirmed, use Techstream Smart Key Data List to review the corresponding signa from the left or right door as illustrated in Figure 1.

^ Door Touch Sensor Door Trigger Switch














3. If the Data List illustrates no change at all in "D-Door Touch Sensor" when touching inside pad of handle and/or "D-Door Trigger Switch" when pushing the lock button, use the Communication Check utility to check oscillator operation (see screen transition examples below for left front door)

REPAIR PROCEDURE:

1. Replace front door handle frame and outside handle in affected door Refer to the ETAS/TIS library, applicable model and model year Repair Manual:


2007-2010 ES 350:

Vehicle Exterior - Door/Hatch - "Engine Hood / Door: Front Door: Disassembly / Reassembly"


NOTE

Before reassembling the plastic liner and trim panel(s), inspect the window travel and make sure there is no contact between the glass bottom edge and the back of the door handle frame If there is contact DO NOT modify handle frame Replace window (equipped with bonded rear plastic mounting bracket) if needed to achieve clearance between components.


2 Confirm normal Smart Key operation after repairs are completed as per previous listed inspections


3 Verify there are no abnormal sounds when running window up and down in both front doors

NOTE:

Issue of this Technical Service Bulletin is to ensure that proper repair information is available. IT DOES NOT CONSTITUTE AN AUTHORIZATION FOR REPAIR. Normal provisions of the formal warranty policy, as applicable, will apply.

© 2012 Lexus, a division of Toyota Motor Sales, Canada