A/C - Odors From Dash Vents With A/C On

L-SB-0129-11

October 10, 2011

HVAC Odor

Service
Category
Vehicle Interior

Section
Heating/Air Conditioning

Market
USA





Applicability

Introduction

Under certain temperature conditions, some vehicles may exhibit an unpleasant odor coming from the face level HVAC vents during the initial 10-30 seconds of HVAC system operation. An HVAC Amplifier is now available with updated logic that will direct air away from the face level vents under certain temperature conditions during the first 10-30 seconds of HVAC operation.

This TSIB does NOT apply if the vehicle exhibits the following conditions:

^ The unpleasant odor continues after the initial 10-30 seconds of HVAC system operation.

^ The unpleasant odor does not begin immediately after the HVAC system is turned ON.

^ The unpleasant odor is present with the HVAC system OFF.

NOTE

If these conditions exist, continue to diagnose the source of the odor using the applicable Repair Manual.

Production Change Information





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





Parts Information





Warranty Information

Repair Procedure

1. Duplicate the condition by performing the following:

A. Park the vehicle outside.

B. Set the HVAC system to Low Fan Speed and Face Mode.

C. Turn the HVAC system OFF.

D. Turn the vehicle OFF.

E. Let the vehicle sit for at least 2 hours.

F. Turn vehicle ON.

G. Turn ON the HVAC system.

NOTE

If the unpleasant odor does not start immediately after the HVAC system is turned ON or continues for more than 30 seconds this TSIB does NOT apply.

2. Remove the NC Amplifier. Refer to the Technical Information System (TIS), applicable model and model year Repair Manual:

2010 / 2011 ES 350:

Vehicle Interior - Heating/Air Conditioning - Air Conditioning - 'Air Conditioning Amplifier: Removal"

3. Install the updated A/C amplifier. Refer to TIS, applicable model and model year Repair Manual:

2010 / 2011 ES 350:

Vehicle Interior - Heating/Air Conditioning - Air Conditioning - "Air Conditioning Amplifier: Installation"

4. Verify Proper HVAC System Operation.