Canada - Suspension - Air Spring Rattle Noise

Bulletin
L-TCI-3091

Issue Date
December 22, 2011

Market
Canada

Title
AIR SPRING RATTLE NOISE

Service Category
Suspension

Section
Front Suspension







APPLICABILITY:

INTRODUCTION:
Some 2007 - 2011 LS460/460L and 2008 - 2011 LS600hl model year vehicles may exhibit a knocking type noise when going over bumps. This may be accompanied by a rough ride condition. Follow the Repair Procedure in this bulletin to address this condition.

PRODUCTION CHANGE INFORMATION:








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







WARRANTY INFORMATION:







PARTS INFORMATION:







REQUIRED TOOLS & EQUIPMENT:

REPAIR PROCEDURE:
1. Conduct a road test over bumps and rough road surfaces, such as Bott's Dots or other raised pavement markers or speed bumps to verify the noise.

HINT
Use chassis ears to help in verifying condition.

NOTE:
Vehicle may have both conditions.

2. Replace the affected Front Shock Absorber with updated actuator.














NOTE
The installation instructions for attaching the air suspension actuator have changed, the updated bracket changes are shown.

Refer to the Repair Manual within ETAS / TIS library:

Front Shock Absorber
- 2007 - 2011 LS460:
Suspension - Front Suspension - "Front Shock Absorber (w/ Air Suspension): Removal"
- 2007 - 2011 LS460:
Suspension - Front Suspension - "Front Shock Absorber (w/ Air Suspension): Installation"
- 2008 - 2011 LS600hL:
Suspension - Front Suspension - "Front Shock Absorber (w/ Air Suspension): Removal"
- 2008 - 2011 LS600hL:
Suspension - Front Suspension - "Front Shock Absorber (w/ Air Suspension): Installation"

Rear Shock Absorber
- 2007 - 2011 LS460:
Suspension - Rear Suspension - "Rear Shock Absorber (w/ Air Suspension): Removal"
- 2007 - 2011 LS460:
Suspension - Rear Suspension - "Rear Shock Absorber (w/ Air Suspension): Installation"
- 2008 - 2011 LS600hL:
Suspension - Rear Suspension - "Rear Shock Absorber (w/ Air Suspension): Removal"
- 2008 - 2011 LS600hL:
Suspension - Rear Suspension - "Rear Shock Absorber (w/ Air Suspension): Installation"

3. Verify condition has been resolved.

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.