A/C - Decreased Vent Air Flow On Maximum Heat
T-SB-0072-09February 26, 2009
Decreased Air Volume from HVAC Vents
Service Category
Vehicle Interior
Section
Heating/Air Conditioning
Market
USA
Applicability
Introduction
Some customers may experience decreased air volume from the HVAC vents when the temperature is set to maximum heat. Use the following repair procedure to address the customer concerns.
Production Change Information
This TSB applies to vehicles produced BEFORE the Production Change Effective VINs shown.
Parts Information
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.
Required Tools & Equipment
NOTE
Additional SSTs may be ordered by calling 1-800-933-8335.
NOTE
Additional refrigerant service equipment may be ordered by calling Toyota Approved Equipment.
Repair Procedure
1. Remove the Air Conditioning unit.
Refer to the Technical Information System (TIS) model year repair manual:
2007 / 2008 Tacoma
Vehicle Interior - Heating/Air Conditioning - "Air Conditioning Unit: Removal"
2. Remove the 4 bolts and the lower defrost nozzle assembly.
3. Remove the 2 bolts and the heater to register duct.
4. Remove the No. 1 air duct.
A. Remove the bolt.
B. Disengage the 3 claws and remove the air duct.
5. Remove the air inlet assembly.
A. Remove the air filter.
B. Remove the 4 bolts and 1 clip that mount the air inlet assembly.
C. Remove the cooler thermistor clip from the air inlet case.
6. Remove the mode damper control assembly.
A. Remove the 3 bolts on the mode mounting plate.
B. Remove the mode damper control assembly including mode cam mode mounting plate and mode control servo.
7. Remove the temperature damper control assembly.
A. Remove the 3 bolts on the temperature control mounting plate.
B. Remove the temperature damper control assembly including temperature control cam mounting plate and servo.
8. Remove the bolt and the heater pivot.
9. Remove the mode case.
A. Remove the 11 bolts and 1 clip that mount the mode case.
10. Remove the evaporator core.
11. Remove the top half of the HVAC main case.
A. Remove the torx bolt and heater pipe clamp.
B. Remove the 2 clips and 15 bolts that mount the top half of the case.
12. Disengage and remove the heater air damper door from the HVAC main case.
13. Install the NEW heater air damper.
14. Install the top half of the HVAC main case with 15 bolts and 2 clips.
Torque: 2.0 N*m (20 kgf*cm, 18 ft*lbf)
A. Install the heater pipe clamp and TORX bolt.
15. Install the evaporator core.
16. Install the mode case.
A. Install the mode case assembly.
B. Install the clip and 11 bolts.
Torque: 2.0 N*m (20 kgf*cm, 18 ft*lbf)
17. Install the bolt and heater pivot.
18. Install the temperature damper control assembly.
A. Install the temperature damper control assembly.
B. Install the 3 bolts on the temperature mounting plate.
Torque: 2.0 N*m (20 kgf*cm, 18 ft*lbf)
19. Install the mode damper control assembly
A. Install the mode damper control assembly.
B. Install the 3 bolts on the mode mounting plate.
Torque: 2.0 N*m (20 kgf*cm, 18 ft*lbf)
20. Install the air inlet assembly
A. Install the air inlet assembly.
B. Install the 4 bolts and 1 clip.
C. Install the air filter.
D. Connect the cooler thermister clip to the air inlet case.
21. Install the No. 1 Air Duct
A. Engage the 3 claws and install the air duct.
B. Install the bolt.
Torque: 2.0 N*m (20 kgf*cm, 18 ft*lbf)
22. Install the heater to register duct center with the 2 bolts.
Torque: 2.0 N*m (20 kgf*cm, 18 ft*lbf)
23. Install the lower defroster nozzle assembly with 4 bolts.
Torque: 2.0 N*m (20 kgf*cm, 18 ft*lbf)
24. Install the air conditioning unit.
NOTE
If compressor oil is removed during A/C system evacuation or removal of the A/C unit, replace it with Delphi RL-897 part # 00289-AC897.
Refer to the TIS model year repair manual:
^ 2007 / 2008 Tacoma
Vehicle Interior - Heating/Air Conditioning - "Air Conditioning Unit: Installation"
25. Confirm operation with temperature setting at maximum heat.