Acura TSX / Honda Accord CL. Manual - part 672

Fig. 101: Supplying 12 Volts To The No. 1 Cavity With A Jumper Wire 

4. Reconnect the 4P connector to the power transistor.  

5. Supply 12 volts to the No. 1 cavity with a jumper wire.  

6. Turn the ignition switch ON (II), and check that the blower motor runs. 

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If the blower motor does not run, replace the power transistor.  

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If the blower motor runs, the power transistor is OK.  

DRIVER'S AIR MIX CONTROL MOTOR TEST 

1. Disconnect the 7P connector from the driver's air mix control motor. 

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX

  

 

2.  

Connect battery power to the No. 1 terminal of the driver's air mix control motor, and ground the No. 2 
terminal; the driver's air mix control motor should run, Cool side. If it doesn't, reverse the connections; 
the driver's air mix control motor should run, Hot side.  

3. If the driver's air mix control motor did not run in step 2, remove it, then check the driver's air mix control 

linkage and door for smooth movement. 

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If the linkage and door move smoothly, replace the driver's air mix control motor.  

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If the linkage or door sticks or binds, repair them as needed.  

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If the driver's air mix control motor runs smoothly, go to step 4. 

Fig. 102: Identifying Driver'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 k ohm. 

NOTE:

Incorrectly applying power and ground to the driver's air mix control 
motor will damage it. Follow the instructions carefully.

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX

  

 

5. Reconnect the driver'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 0.5 V  

Max Hot: About 4.5 V  

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

DRIVER'S AIR MIX CONTROL MOTOR REPLACEMENT 

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

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

Fig. 103: Removing Driver'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 

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX

  

 

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

PASSENGER'S AIR MIX CONTROL MOTOR TEST 

1. Disconnect the 7P connector from the passenger's air mix control motor. 

2.  

Connect battery power to the No. 1 terminal of the passenger's air mix control motor, and ground the No. 
2 terminal; the passenger's air mix control motor should run, Cool side. If it doesn't, reverse the 
connections; the passenger's air mix control motor should run Hot side.  

3. If the passenger's air mix control motor did not run in step 2, remove it, then check the passenger's air mix 

control linkage and door for smooth movement. 

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If the linkage and door move smoothly, replace the passenger's air mix control motor.  

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If the linkage or door sticks or binds, repair them as needed.  

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If the passenger's air mix control motor runs smoothly, go to step 4. 

NOTE:

Incorrectly applying power and ground to the passenger's air mix control 
motor will damage it. Follow the instructions carefully.

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX