A/C - Rear Vents Blow Hot Air With A/C On
T-SB-0143-08July 30, 2008
Rear HVAC Vents Blow Hot Air with A/C "ON"
Service Category
Vehicle Interior
Section
Heating/Air Conditioning
Market
USA
Applicability
TSB SUPERSESSION NOTICE
The information contained in this TSB supersedes TSB No. AC002-08.
^ Step 5 of the Repair Procedure has been updated with additional views and procedures.
TSB No. AC002-08 is Obsolete and any printed versions should be discarded. Be sure to review the entire content of this service bulletin before proceeding.
Introduction
Some customers may experience a condition where the rear center vents blow warmer air than the front center vents. A new HVAC servo motor has been designed to correct this concern. Follow the procedures listed in this bulletin to remove and replace the HVAC servo motor.
Production Change Information
This TSB applies to vehicles produced BEFORE the Production Change Effective VIN shown.
Warranty Information
APPLICABLE WARRANTY
^ This repair is covered under the Toyota Comprehensive Warranty. This warranty is in effect for 36 months or 36,000 miles, whichever occurs first, from the vehicle's in-service date.
^ Warranty application is limited to correction of a problem based upon a customer's specific complaint.
Parts Information
Required Tools & Equipment
Additional refrigerant service equipment may be ordered by calling Toyota Approved Dealer Equipment (ADE).
Repair Procedure
1. Remove the air conditioning unit.
Refer to the Technical Information System (TIS) applicable model and model year Repair Manual:
^ 2005 model year Avalon Repair Manual Vehicle Interior - Heating/Air Conditioning - "Blower Assy: Overhaul"
^ 2006 or 2007 model year Avalon Repair Manual Vehicle Interior - Heating/Air Conditioning - "Air Conditioning: Air Conditioning Unit: Removal"
2. Remove the No. 2 air duct sub-assembly by releasing the 2 claws as shown in Figure 1.
3. Remove the blower assembly.
A. Remove the connector and clamp and disconnect the wire harness.
B. Remove the 6 screws and then the blower assembly with the cooler-evaporator sub-assembly.
4. Remove the air outlet control servo motor.
A. Disconnect the 2 connectors and remove the air conditioner harness.
B. Remove the 3 screws and then remove the air outlet control servo motor.
5. Install the NEW air outlet control servo motor.
A. Align the air conditioning unit servo arms and gears. Refer to Figure 6 and sub-steps (1)-(6).
(1) Rotate arm "A" clockwise until the end of travel.
(2) Rotate arm "B" counter-clockwise until the end of travel.
(3) Rotate arm "C" counter-clockwise until the end of travel.
(4) Rotate cam "D" clockwise until the end of travel.
(5) Rotate arm "E" counter-clockwise until the end of travel.
(6) Align the leading edge of "Cam F" with the line casting in the case.
B. Install the air outlet control servo motor with the 3 screws.
C. Install the air conditioner harness and connect the 2 connectors.
6. Install the blower assembly.
A. Install the blower assembly with the 6 screws.
B. Connect the wire harness and install the connector and clamp.
7. Install the No. 2 air duct sub-assembly by engaging the 2 claws.
8. Install the air conditioning unit.
Refer to the TIS applicable model and model year Repair Manual:
^ 2005 model year Avalon Repair Manual Vehicle Interior - Heating/Air Conditioning - "Blower Assy: Overhaul"
^ 2006 or 2007model year Avalon Repair Manual Vehicle Interior - Heating/Air Conditioning - Air Conditioning: Air Conditioning Unit: Installation"
9. Verify the heater and air conditioner operate correctly in all modes.