A/C - Blower Speed/Volume Gradually Dminishes
HEATING & AIR CONDITIONINGAC002-03
December 4, 2003
Title
A/C PERFORMANCE IMPROVEMENT
Models
'04 RX 330
Introduction
Some 2004 model year RX 330 owners may experience a condition where the blower volume gradually decreases after about 1-1/2 hours of driving. It has been determined that, in hot, high humidity conditions, the A/C system evaporator is freezing over, blocking the airflow path. An in-line thermistor resistor harness is now available to correct this concern.
Applicable Vehicles
^ 2004 model year RX 330 vehicles produced BEFORE the Production Change Effective VINs shown below.
Production Change Information
Parts Information
Warranty Information
Applicable Warranty:
This repair is covered under the Lexus Comprehensive Warranty. This warranty is in effect for 48 months or 50,000 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.
Repair Procedure
1. Remove Front Door Scuff Plate LH.
A. Using a screwdriver, disengage the 7 retaining tabs and 3 clips, to remove the scuff plate.
HINT:
Tape the screwdriver tip before use.
2. Remove Instrument Panel Finish Panel Sub-Assembly Lower.
A. Remove the bolt and the screw
B. Disconnect the hood lock control cable assembly.
C. Disengage the 5 retaining tabs and 4 clips to remove the instrument panel finish panel sub-assembly lower.
3. Remove Floor Carpet Cover Center LH.
A. Remove the 2 clips from the floor carpet cover center LH.
B. Depress the edge of the floor carpet cover center to disengage the 2 retaining tabs.
C. Slide the floor carpet cover toward the front of the vehicle, disengage the 2 retaining tabs from the lower instrument finish panel.
D. Remove the floor carpet cover center LH.
4. Remove Front Door Scuff Plate RH.
A. Using a screwdriver, disengage the 7 retaining tabs and 3 clips, and remove the scuff plate.
HINT:
Tape the screwdriver tip before use.
5. Remove Glove Compartment Door Assembly.
A. Remove the 2 bolts and the 2 screws
B. Pull the glove compartment door assembly to the rear to remove it.
C. Disconnect the connector.
6. Remove Floor Carpet Cover Center RH.
7. Remove Shift Lever Knob Sub-Assembly.
A. Turn the shift lever knob counterclockwise and remove the shift lever knob sub-assembly.
8. Remove Console Panel Upper Front.
A. Disengage the 4 clips and remove the console panel upper front.
9. Remove Instrument Panel Finish Panel Lower.
A. Disengage the 2 clips and remove the instrument panel finish panel lower, then disconnect the connectors.
10. Remove Instrument Panel Finish Panel Lower Center.
A. Remove the 7 screws
B. Disengage the 2 clips and remove the instrument panel finish panel lower center.
11. Disconnect Cooler Thermistor No. 1.
A. Release the clamp and connector.
12. Install the Resistor Harness.
A. Connect the resistor harness between the cooler thermistor No. 1 connector and instrument panel wire harness.
13. Secure the Resistor Harness.
A. Using the supplied zip tie, fasten the resistor harness to the adjacent wire harness as shown in the illustration.
14. Verify Operation of the A/C System.
15. Reinstall the Removed Parts.