A/C Performance Improvement (AC002-03)

A/C PERFORMANCE IMPROVEMENT

TECHNICAL SERVICE BULLETIN

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

MODEL	PRODUCTION CHANGE EFFECTIVE VIN
RX 330 2WD	JTJGA31U640020593
RX 330 4WD	JTJHA31U940039322

Parts Information

PREVIOUS PART NUMBER	CURRENT PART NUMBER	PART NAME	QTY
N/A	88648-33120	Wire, Air Conditioner	1

WARRANTY INFORMATION

OP CODE	DESCRIPTION	TIME	OFP	T1	T2
AC3002	Install A/C Wire	1	88501-07020	87	99

* 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. 
   1. Using a screwdriver, disengage the 7 retaining tabs and 3 clips, to remove the scuff plate.

      HINT: Tape the screwdriver tip before use. 

   Fig 1: Locating Scuff Plate Retaining Tabs

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Remove Instrument Panel Finish Panel Sub-Assembly Lower. 
   1. Remove the bolt <B> and the screw <D>.
   2. Disconnect the hood lock control cable assembly.
   3. Disengage the 5 retaining tabs and 4 clips to remove the instrument panel finish panel sub-assembly lower.
   Fig 2: Removing Instrument Panel Finish Panel Lower

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Remove Floor Carpet Cover Center LH. 
   1. Remove the 2 clips from the floor carpet cover center LH.
   2. Depress the edge of the floor carpet cover center to disengage the 2 retaining tabs.
   3. Slide the floor carpet cover toward the front of the vehicle, disengage the 2 retaining tabs from the lower instrument finish panel.
      Fig 3: Removing Floor Carpet Cover Center

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Remove the floor carpet cover center LH.
4. Remove Front Door Scuff Plate RH. 
   1. 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. 
   1. Remove the 2 bolts <B> and the 2 screws <D>.
   2. Pull the glove compartment door assembly to the rear to remove it.
   3. Disconnect the connector.
   Fig 4: Removing Glove Compartment Door Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. Remove Floor Carpet Cover Center RH. 
7. Remove Shift Lever Knob Sub-Assembly. 
   1. Turn the shift lever knob counterclockwise and remove the shift lever knob sub-assembly.
   Fig 5: Direction Of Rotation To Remove Shift Lever Knob

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
8. Remove Console Panel Upper Front. 
   1. Disengage the 4 clips and remove the console panel upper front.
   Fig 6: Locating Console Panel Upper Front Clip

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
9. Remove Instrument Panel Finish Panel Lower. 
   1. Disengage the 2 clips and remove the instrument panel finish panel lower, then disconnect the connectors.
   Fig 7: Locating Instrument Panel Finish Panel Lower Center

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
10. Remove Instrument Panel Finish Panel Lower Center. 
    1. Remove the 7 screws <D>.
    2. Disengage the 2 clips and remove the instrument panel finish panel lower center.
    Fig 8: Removing Instrument Panel Finish Panel Lower Center

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
11. Disconnect Cooler Thermistor No. 1. 
    1. Release the clamp and connector.
    Fig 9: Locating Cooler Thermistor Tab And Clamp

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
12. Install the Resistor Harness. 
    1. Connect the resistor harness between the cooler thermistor No. 1 connector and instrument panel wire harness.
    Fig 10: Resistor Harness

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
13. Secure the Resistor Harness. 
    1. Using the supplied zip tie, fasten the resistor harness to the adjacent wire harness as shown in Fig 11.
    Fig 11: Securing The Resistor Harness With Zip Tie

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
14. Verify Operation of the A/C System. 
15. Reinstall the Removed Parts.