Acura RL. Manual - part 571

Fig. 62: Checking Continuity Between Terminals Of Climate Control Unit 40P Connector And 
Audio Unit Connector B (32P) 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Go to step 9. 

NO - Repair open in the wire(s) between the climate control unit and the audio unit. 

9. Check for continuity between body ground and the climate control unit 40P connector No. 29 and No. 

30 terminals individually. 

Fig. 63: Checking Continuity Between Body Ground And Climate Control Unit 40P Connector 
29 And 30 Terminals 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Repair short to body ground in the wire(s) between the climate control unit and the audio unit. 

NO - Go to step 10. 

10. Check for continuity between the climate control unit 40P connector No. 29 and No. 30 terminals. 

 

2007 Acura RL 

2005-08 HVAC HVAC - RL

  

me 

 

Friday, June 05, 2009 2:25:43 PM

Page 67 

© 2005 Mitchell Repair Information Company, LLC. 

Fig. 64: Checking Continuity Between Climate Control Unit 40P Connector 29 And 30 
Terminals 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Repair short in the wires between the climate control unit and the audio unit. 

NO - Check for loose wires or poor connections at the climate control unit 40P connector and at audio 
unit connector B (32P). If the connections are good, substitute a known-good climate control unit, and 
recheck. If the symptom/indication goes away, replace the original climate control unit. If the 
symptom/indication continues, substitute a known-good audio unit, and recheck. If the symptom/ 
indication goes away, replace the original audio unit. 

COMP Solenoid error is indicated: A Problem in the Variable Capacity Control Solenoid Valve Circuit 

1. Clear the DTC by turning the ignition switch OFF and then ON (II).  

2. Start the engine, and turn on the A/C.  

3. Measure the voltage of the battery. 

Is there 11.5 V or more?  

YES - Go to step 4. 

NO - Charge the battery or replace it. 

4. Turn off the A/C, and stop the engine.  

5. Clear the DTC by turning the ignition switch OFF and then ON (II).  

6. Operate the climate control system in several modes.  

7. Check for DTCs using the self-diagnostic. 

Is DTC COMP solenoid error indicated?  

YES - Go to step 8. 

NO - Intermittent failure, check for loose wires or poor connections on the variable capacity control 
solenoid valve circuit. 

 

2007 Acura RL 

2005-08 HVAC HVAC - RL

  

me 

 

Friday, June 05, 2009 2:25:43 PM

Page 68 

© 2005 Mitchell Repair Information Company, LLC. 

8. Turn the ignition switch OFF.  

9. Disconnect the climate control unit 40P connector.  

10. Measure the resistance between the climate control unit 40P connector No. 3 and No. 4 terminals. 

Fig. 65: Measuring Resistance Between Climate Control Unit 40P Connector No. 3 And No. 4 
Terminals 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

'05 models: Is there about 10.6 ohms ?, '06-08 models: Is there about 5.2 ohms ?  

YES - Go to step 11. 

NO - Go to step 14. 

11. Check for continuity between body ground and the climate control unit 40P connector No. 3 and No. 

4 terminals individually. 

Fig. 66: Checking Continuity Between Body Ground And Climate Control Unit 40P Connector 
No. 3 And No. 4 Terminals 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Go to step 12. 

NO - Substitute a known-good climate control unit, and recheck. If the symptom/indication goes 
away, replace the original climate control unit. 

12. Disconnect the A/C compressor clutch 3P connector. 

 

2007 Acura RL 

2005-08 HVAC HVAC - RL

  

me 

 

Friday, June 05, 2009 2:25:43 PM

Page 69 

© 2005 Mitchell Repair Information Company, LLC. 

13. Check for continuity between body ground and the climate control unit 40P connector No. 3 and No. 

4 terminals individually. 

Fig. 67: Checking Continuity Between Body Ground And Climate Control Unit 40P Connector 
3 And 4 Terminals 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Repair short to body ground in the wire(s) between the climate control unit and the variable 
capacity control solenoid valve. 

NO - The variable capacity control solenoid valve is faulty, replace the A/C compressor. 

14. Disconnect the A/C compressor clutch 3P connector.  

15. Check for continuity between the climate control unit 40P connector No. 3 and No. 4 terminals. 

Fig. 68: Checking Continuity Between Climate Control Unit 40P Connector 3 And 4 Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Is there continuity?  

YES - Repair short in the wires between the climate control unit and the variable capacity control 
solenoid valve. 

NO - Go to step 16. 

16. Check for continuity between the following terminals of the climate control unit 40P connector and 

the A/C compressor clutch 3P connector. 

 

2007 Acura RL 

2005-08 HVAC HVAC - RL

  

me 

 

Friday, June 05, 2009 2:25:43 PM

Page 70 

© 2005 Mitchell Repair Information Company, LLC.