Acura TSX / Honda Accord CL. Manual - part 673

Fig. 104: Identifying Passenger's Air Mix Control Motor Connector Terminals 

4. Measure the resistance between the No. 5 and No. 7 terminals. It should be between 4.2 k to 7.8 kohm.  

5. Reconnect the passenger's air mix control motor 7P connector, then turn the ignition switch ON (II).  

6. Measure the voltage between the No. 3 and No. 5 terminals. 

Max Cool: About 1.5 V  

Max Hot: About 4.5 V  

7. If either the resistance or voltage readings are not as specified, replace the passenger's air mix control 

motor.  

PASSENGER'S AIR MIX CONTROL MOTOR REPLACEMENT 

1. Disconnect the 7P connector (A) from the passenger's air mix control motor (B). Remove the self-tapping 

screws and the passenger's air mix control motor from the heater unit. 

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX

  

 

Fig. 105: Removing Passenger's Air Mix Control Motor 

2. Install the motor in the reverse order of removal. Make sure the pin on the motor is properly engaged with 

the linkage. After installation, make sure the motor runs smoothly.  

MODE CONTROL MOTOR TEST 

1. Disconnect the 7P connector from the mode control motor. 

2.  

Connect battery power to the No. 2 terminal of the mode control motor, and ground the No. 1 terminal; 
the mode control motor should run smoothly, Vent side. If it doesn't, reverse the connections; the mode 
control motor should run smoothly, Defrost side. When the mode control motor stops running, disconnect 
battery power immediately. 

NOTE:

Incorrectly applying power and ground to the mode control motor will 
damage it. Follow the instructions carefully.

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX

  

 

Fig. 106: Identifying Mode Control Motor Connector Terminals 

3. If the mode control motor did not run in step 2, remove it, then check the mode control linkage and doors 

for smooth movement. 

z

If the linkage and doors move smoothly, replace the mode control motor.  

z

If the linkage or doors stick or bind, repair them as needed.  

z

If the mode control runs smoothly, go to step 4.  

4. Use a digital multimeter with an output of 1 mA or less at the 20 kohm range. With the mode control 

motor running as in step 2, check for continuity between the No. 3, 4, 5 and 6 terminals and the No. 7 
terminal individually. There should be continuity for a moment at each terminal as the motor moves past 
the switch's terminal.  

5. If there is no continuity for a moment at each terminal, replace the mode control motor.  

MODE CONTROL MOTOR REPLACEMENT 

1. Open the glove box. Remove the damper from the glove box, then let the glove box hang down (see 

GLOVE BOX REMOVAL/INSTALLATION ) 

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX

  

 

2. Remove the relays from the bracket. 

Fig. 107: Removing The Relays From The Bracket 

3. Disconnect the 7P connector (A) from the mode control motor (B). Remove the self-tapping screws and 

the mode control from the heater unit. 

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX