Acura TSX / Honda Accord CL. Manual - part 646

Fig. 7: Replacing A/C Refrigerant Oil 

GENERAL TROUBLESHOOTING INFORMATION 

HOW TO CHECK FOR DTCS WITH THE HDS 

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX

  

 

1. Make sure the ignition switch is OFF.  

2. Connect the HDS to the Data Link Connector (DLC) located under the driver's side of the dashboard. 

Fig. 8: Connecting The HDS To The Data Link Connector (DLC) Located Under The Driver's Side 
Of The Dashboard 

3. Turn the ignition switch ON (II).  

4. Select DTCs in the body electrical/climate control mode MENU of the HDS.  

5. Check for DTCs. If a DTCs indicated, go to the next step. If no DTC(s) indicated, refer to symptom 

troubleshooting.  

6. Turn the ignition switch OFF.  

7. Disconnect the HDS from the DLC.  

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX

  

 

8. Do the troubleshooting procedure for the DTC indicated.  

HOW TO RETRIEVE A DTC (WITHOUT HDS) 

The audio-HVAC display module has a self-diagnosis function for climate control. To run the self-diagnosis 
function, do the following: 

1. Turn the ignition switch ON (II).  

2. Press the AUTO button, and set the temperature to Lo.  

3. Press and hold the OFF button. While holding the OFF button, press the rear window defogger button 

five times within 10 seconds. The self-diagnosis will begin. 

Fig. 9: Retrieving a DTC Without Navigation System

NOTE:

Before troubleshooting the climate control system, refer to the multiplex 
integrated control system test mode A (see TROUBLESHOOTING ).

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX

  

 

Fig. 10: Retrieving a DTC With Navigation System 

If there is any problem in the system, the temperature indicator will light up the segment (A through Q) 
corresponding to the error. The temperature indicator will then alternate every second between displaying 
"88" (all segments lit) and the error code segment (A through Q). To determine the meaning of the DTC, 
refer to the DTC Troubleshooting Index. 

If there are no problems detected, the screen will go blank in about 10 seconds. 

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX