Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.

PERFORM ACTUATOR CHECK
1. Remove the glove box to see and check the recirculation damper operation.
2. Set to the actuator check mode (see PRE-CHECK ).
3. Press the DEF switch and change it to step operation.
4. Press the DEF switch in order and check the operation of recirculation damper.
  
  Fig 1: Recirculation Damper Position Check Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE(SEE PROBLEM SYMPTOMS TABLE )

NG: Go to next step.
INSPECT RECIRCULATION DAMPER SERVO SUB-ASSY
1. Remove the recirculation damper servo sub-assy.
2. Connect the positive (+) lead to from the battery to terminal 5 and negative (-) lead to terminal 4, then check that the lever turns to "FRS" side smoothly.
3. Connect the positive (+) lead to from the battery to terminal 4 and negative (-) lead to terminal 5, then check that the lever turns to "REC" side smoothly.
  
  Fig 2: Identifying Recirculation Damper Servo Sub-Assy Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 3: Identifying Position Of Air Mix Damper Servo Sub-Assy
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPLACE RECIRCULATION DAMPER SERVO SUB-ASSY

OK: Go to next step.
CHECK HARNESS AND CONNECTOR(BETWEEN RECIRCULATION DAMPER SERVOMOTOR AND HEATER CONTROL HOUSING SUB-ASSY)
1. Remove A/C amplifier with connectors still connected.
2. Measure voltage between terminal AIF of A/C amplifier and body ground when recirculation switch is operated, as shown in the chart.
  
  Fig 4: Measuring Voltage Between Terminal Air Of A/C Amplifier And Body Ground
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 5: Identifying Voltage Measurement Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Voltage
  
  Fig 6: Identifying Voltage Measurement Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  HINT: When you out voltage measurement, please measure, while a servomotor operates.
3. Measure voltage between terminal AIR of A/C amplifier and body ground when recirculation switch is operated, as shown in the chart.
HINT: When you out voltage measurement, please measure, while a servomotor operates.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: CHECK AND REPLACE HEATER CONTROL HOUSING SUB-ASSY