Acura TSX / Honda Accord CL. Manual - part 657

Fig. 50: Checking For Continuity Between Body Ground & Audio-HVAC Display Panel 
Connector A (22P) Terminals No. 6, 7, 15, 16, 17, 18 & 19 

9. Turn the ignition switch ON (II), and check the same terminals for voltage. 

Is there any voltage? 

YES: Repair any short to power in the wire(s) between the audio-HVAC display panel and 
the mode control motor. This short may also damage the audio-HVAC display panel. Repair 
the short to power before replacing the audio-HVAC display panel.  

NO: Go to step 10.  

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX

  

 

Fig. 51: Checking For Voltage Between Body Ground & Audio-HVAC Display Panel 
Connector A (22P) Terminals No. 6, 7, 15, 16, 17, 18 & 19 

10. Turn the ignition switch OFF, and check for continuity between following terminals of audio-HVAC 

display panel connector A (22P) and the mode control motor 7P connector. 

Is there continuity? 

YES: Check for loose wire or poor connections at audio-HVAC display panel connector A 
(22P) and at the mode control motor 7P connector. If the connections are good, substitute a 
known-good audio-HVAC display panel, and recheck. If the symptom/indication goes away, 
replace the original audio-HVAC display panel.  

NO: Repair any open in the wire(s) between the audio-HVAC display panel and the mode 
control motor.  

CONNECTOR CONTINUITY TESTING 

Audio-HVAC Display Panel Connector A (22P) 
Terminal No.

Driver's Air Mix Control Motor 7P Conn

Termin

6
7
15
16
17

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX

  

 

Fig. 52: Checking For Continuity Between Terminals Of Audio-HVAC Display Panel 
Connector A (22P) & The Mode Control Motor 7P Connector 

DTC INDICATOR M OR DTC B1240: A PROBLEM IN THE MODE CONTROL LINKAGE, DOORS, 
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 M or B1240 indicated?

18
19

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX

  

 

YES: Go to step 5.  

NO: Intermittent failure.  

5. Test the mode control motor (see MODE CONTROL MOTOR TEST ). 

Is the mode control motor and linkage 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 mode control motor, or repair the mode control linkage or doors.  

DTC INDICATOR N OR DTC B1241: A PROBLEM IN THE BLOWER MOTOR CIRCUIT 

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 N or B1241 indicated? 

YES: Go to step 5.  

NO: Intermittent failure, check for loose wires or poor connections on the blower motor 
circuit.  

5. Check the No. 21 (40A) fuse in the under-hood fuse/relay box, and the No. 30 (7.5A) fuse in the under-

dash fuse/relay box. 

Are the fuses OK? 

YES: Go to step 6.  

NO: Replace the fuse(s), and recheck.  

6. Connect the No. 2 terminal of the blower motor 2P connector to body ground with a jumper wire. 

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX