Acura TSX / Honda Accord CL. Manual - part 660

Fig. 61: Checking For Continuity Between The No. 3 Terminal Of The Blower Motor Relay 
4P Socket & Body Ground 

DTC INDICATOR O OR DTC B1236: AN OPEN IN THE PASSENGER'S AIR MIX CONTROL 
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. 

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX

  

 

Is DTC O or B1236 indicated? 

YES: Go to step 5.  

NO: Intermittent failure, check for loose wires or poor connections on the passenger's air mix 
control motor circuit.  

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: Go to step 6.  

NO: Replace the passenger's air mix control motor.  

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

7. Disconnect audio-HVAC display panel connector A (22P).  

8. Check for continuity between following terminals of audio-HVAC display panel connector A (22P) and 

the passenger's air mix 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 passenger's air mix 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 
passenger's air mix control motor.  

CONNECTOR CONTINUITY TESTING 

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

Driver's Air Mix Control Motor 7P Conn

Termin

2
10
15
20
22

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX

  

 

Fig. 62: Checking For Continuity Between Terminals Of Audio-HVAC Display Panel 
Connector A (22P) & The Passenger's Air Mix Control Motor 7P Connector 

DTC INDICATOR P OR DTC B1237: A SHORT IN THE PASSENGER'S AIR MIX CONTROL 
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 P or B1237 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: Go to step 6.  

NO: Replace the passenger's air mix control motor.  

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

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX

  

 

7. Disconnect audio-HVAC display panel connector A (22P).  

8. Check for continuity between body ground and audio-HVAC display panel connector A (22P) terminals 

No. 2, 10, 15, 20 and 22 individually. 

Is there continuity? 

YES: Repair any short to body ground in the wire(s) between the audio-HVAC display panel 
and the passenger's air mix control motor.  

NO: Go to step 9.  

Fig. 63: Checking For Continuity Between Body Ground & Audio-HVAC Display Panel 
Connector A (22P) Terminals No. 2, 10, 15, 20 & 22 

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 passenger's air mix control motor. This short also may damage the audio-HVAC display 
panel. Repair the short to power before replacing the audio-HVAC display panel.  

NO: Check for loose wire or poor connection at audio-HVAC display panel connector A 
(22P) and at the evaporator temperature sensor 2P connector. If the connections are good, 
substitute a known-good audio-HVAC display panel, and recheck. If the symptom/indication 

 

2004 Acura TSX 

2004 AUTOMATIC A/C SYSTEMS Climate Control System - TSX