Acura TSX / Honda Accord CL. Manual - part 661

goes away, replace the original audio-HVAC display panel. 

Fig. 64: Checking For Voltage Between Body Ground & Audio-HVAC Display Panel 
Connector A (22P) Terminals No. 2, 10, 15, 20 & 22 

DTC INDICATOR Q OR DTC B1238: A PROBLEM IN THE PASSENGER'S AIR MIX CONTROL 
LINKAGE, DOOR, OR MOTOR 

1. Clear the DTC.  

2. Turn the ignition switch OFF, and then ON.  

3. Operate the climate control system is several modes.  

4. Check the DTCs. 

Is DTC Q or B1238 indicated? 

YES: Go to step 5.  

NO: Intermittent failure.  

5. Test the passenger's air mix control motor (see PASSENGER'S AIR MIX CONTROL MOTOR 

TEST ). 

Is the passenger's air mix control motor OK? 

YES: Substitute a known-good audio-HVAC display panel, and recheck. If the 
symptom/indication goes away, replace the original audio-HVAC display panel.  

NO: Replace the passenger's air mix control motor, or repair the passenger's air mix control 

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX

  

 

linkage or door.  

DTC B1202: CLIMATE CONTROL UNIT INTERNAL ERROR 

1. Clear the DTCs using the HDS.  

2. Turn the ignition switch OFF then ON.  

3. Turn the climate control system on and operate several functions. (A/C on/off, air mix and blend door 

operations, temperature settings etc.)  

4. Check the DTCs by selecting the DTC MENU (DTCs) from the HDS. 

IS DTC B1202 indicated? 

YES: The audio-HVAC display panel is faulty, replace the audio-HVAC display panel.  

NO: Intermittent failure, the audio-HVAC display panel is OK at this time. Check for loose 
or poor connections at audio-HVAC display panel connector A (22P). If the connections are 
good, check the battery condition and the charging system (see GENERATORS & 
REGULATORS ).  

DTC B1205: CLIMATE CONTROL UNIT LOST COMMUNICATION WITH THE GAUGE 
CONTROL MODULE (VSP/NE MESSAGES); DTC B1206: CLIMATE CONTROL UNIT LOST 
COMMUNICATION WITH THE GAUGE CONTROL MODULE (ECT MESSAGES); DTC B1207: 
CLIMATE CONTROL UNIT LOST COMMUNICATION WITH THE GAUGE CONTROL MODULE 
(ILLUMI MESSAGES) 

1. Push the AUTO button. 

Does the climate control turn on? 

YES: Go to step 2.  

NO: Go to climate control power and ground circuits troubleshooting (see BODY 
ELECTRICAL CONNECTORS & HARNESSES ).  

2. Clear the DTCs using the HDS.  

3. Turn the ignition switch OFF then ON.  

4. Turn the climate control system on and operate several functions. (A/C on/off, air mix and blend door 

operations, temperature settings etc.)  

5. Check the DTCs by selecting the DTCs MENU (DTCs) from the HDS. 

Is DTC B1205, B1206 and/or B1207 indicated? 

YES: Go to step 6.  

NO: Intermittent failure, the gauge control module and audio-HVAC display panel are ok at 
this time.  

6. Check the DTCs by selecting the DTCs MENU (DTCs) from the HDS. 

Is DTC B1008, B1060 and/or B1061 indicated? 

YES: Perform the gauge control module self test procedure (see SELF-DIAGNOSTIC 
PROCEDURE ).  

NO: The climate control unit is faulty, replace the audio-HVAC display panel. 

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX

  

 

RECIRCULATION CONTROL MOTOR CIRCUIT TROUBLESHOOTING

1. Check the No. 30 (7.5A) fuse in the under-dash fuse/relay box. 

Is the fuse OK? 

YES: Go to step 2.  

NO: Replace the fuse, and recheck.  

2. Disconnect the recirculation control motor 7P connector.  

3. Turn the ignition switch ON (II).  

4. Measure the voltage between the No. 1 terminal of the recirculation control motor 7P connector and body 

ground. 

Is there battery voltage? 

YES: Go to step 5.  

NO: Repair open in the wire between the No. 30 fuse in the under-dash fuse/relay box and 
the recirculation control motor. 

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX

  

 

Fig. 65: Measuring The Voltage Between The No. 1 Terminal Of The Recirculation Control 
Motor 7P Connector & Body Ground 

5. Turn the ignition switch OFF.  

6. Test the recirculation control motor (see RECIRCULATION CONTROL MOTOR TEST ). 

Is the recirculation control motor OK? 

YES: Go to step 7.  

NO: Replace the recirculation control motor, or repair the recirculation control linkage or 
doors.  

7. Disconnect audio-HVAC display panel connector B (16P).  

8. Check for continuity between the No. 10 and No. 11 terminals of audio-HVAC display panel connector B 

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX