Canada - Electrical - Intermittent Horn Operation

Bulletin
TSB3531

Issue Date
December 2, 2010

Market
Canada

Title
INTERMITTENT HORN OPERATION

Component
STEERING

Models
'05-'09 Avalon

TSB SUPERSESSION NOTICE
The information contained in this TSB supersedes TSB No. 2613.
- Applicability has been updated to include 2007 - 2009 model year Avalon vehicles.
- Repair Procedure section has been updated.

TSB No. 2613 is Obsolete and any printed versions should be discarded. Be sure to review the entire content of this service bulletin before proceeding.

INTRODUCTION:
Some 2005 - 2009 model year Avalon vehicles may exhibit an intermittent horn operation. In order to improve the horn ground circuit performance between the steering column and the vehicle chassis, an improved steering column assembly has been made available.

NOTE:
If the steering column is being replaced for ticking noise, please refer to TSB No. 2441.






APPLICABILITY:

PRODUCTION CHANGE INFORMATION:







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






WARRANTY INFORMATION:






PARTS INFORMATION:

REPAIR PROCEDURE:
1. Disconnect the negative (-) battery terminal.

CAUTION:
Wait for at least 90 seconds after disconnecting the battery cable to prevent possible airbag deployment.







2. Remove the front door scuff plate LH.
3. Remove the cowl side trim sub-assembly LH.
4. Remove the instrument panel finish lower panel LH.
5. Remove the instrument panel airbag assembly lower No. 1.







6. Remove the steering wheel cover lower No. 2.
7. Remove the steering wheel cover lower No. 3.







8. Remove the steering column cover LWR.
A. Remove the 2 screws. Turn the steering from right to left to access the 2 screws.
B. Disengage the 2 claws to remove the steering column cover LWR.







9. Disengage the claw and remove the steering column cover.
10. Place front wheels facing straight ahead.
11. As a confirmation test, run a temporary jumper wire from the top steering column bracket to a known good body ground that is NOT on the steering column.
12. Reconnect the negative (-) battery terminal.







NOTE:
Be sure to remove the temporary jumper wire after testing is complete.

13. Verify that the horn does work.
A. If the horn does work, go to step 14.
B. If the horn does NOT work, perform normal system diagnosis for other related ground issues and/or functional electrical checks.

14. Replace the steering column.
Refer to the Repair Manual within E-TAS / TIS library:
- Division: Toyota
- Model: Avalon
- Year: 2005
- Service Category: Steering
- Section: Steering Column
- Keyword: Steering Column: Assembly

- Division: Toyota
- Model: Avalon
- Year: 2006 / 2007 / 2008 / 2009
- Service Category: Steering
- Section: Steering Column
- Keyword: Steering Column Assembly: Removal

15. Confirm proper operation of horn.

NOTE:
If vehicle is equipped with SMART key be sure to perform the ECU code registration procedure "F"

Refer to the Repair Manual within E-TAS / TIS library:
- Division: Toyota
- Model: Avalon
- Year: 2005
- Service Category: Vehicle Interior
- Section: Theft Deterrent/Keyless Entry
- Keyword: Smart Key System: Registration

- Division: Toyota
- Model: Avalon
- Year: 2006 / 2007 / 2008 / 2009
- Service Category: Vehicle Interior
- Section: Door Lock
- Keyword: Smart Key System: Registration

16. Re-initialize any affected power systems.


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.