Acura RL. Manual - part 591

2005-08 ACCESSORIES AND EQUIPMENT

Automatic Dimming Inside Mirror - RL 

CIRCUIT DIAGRAM 

Fig. 1: Automatic Dimming Inside Mirror - Circuit Diagram 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

SYSTEM DESCRIPTION 

 

2007 Acura RL 

2005-08 ACCESSORIES AND EQUIPMENT Automatic Dimming Inside Mirror - RL

  

 

2007 Acura RL 

2005-08 ACCESSORIES AND EQUIPMENT Automatic Dimming Inside Mirror - RL

  

me 

 

Friday, June 05, 2009 3:30:38 PM

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© 2005 Mitchell Repair Information Company, LLC. 

me 

 

Friday, June 05, 2009 3:30:41 PM

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The automatic dimming inside mirror has a front-facing lux level sensor (A), a rear-facing lux level sensor 
(B), and a control unit. The control unit receives signals from each sensor. Based on the difference between 
the two lux levels (the light outside the vehicle and the light from the headlights of the other vehicle, etc.), 
the control unit controls the electro-chromic gel to reduce the glare. This dimming function is canceled 
when the transmission is in reverse, or when the automatic dimming off switch (C) is turned OFF. 

Fig. 2: Identifying Rear-Facing Lux Level Sensor And Front-Facing Lux Level Sensor 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

TEST/REPLACEMENT 

1. Remove the roof console front cover.  

2. Disconnect the 6P connector (A) from the automatic dimming inside mirror (B). 

Fig. 3: Identifying Automatic Dimming Inside Mirror And 6P Connector 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

3. Check for continuity between No. 6 terminal and body ground. 

 

2007 Acura RL 

2005-08 ACCESSORIES AND EQUIPMENT Automatic Dimming Inside Mirror - RL

  

me 

 

Friday, June 05, 2009 3:30:38 PM

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© 2005 Mitchell Repair Information Company, LLC. 



If there is continuity, go to step 4.  



If there is no continuity, check for: 



An open in the wire.  



Poor ground (G 601).  

4. Measure the voltage between No. 4 terminal and body ground with the ignition switch ON (II). 



If there is battery voltage, go to step 5.  



If there is no voltage, check for: 



Blown No. 21 (10A) fuse in the driver's under-dash fuse/relay box.  



An open in the wire.  

5. Measure the voltage between No. 5 terminal and body ground with the ignition switch ON (II) and the 

transmission range switch in R position. 



If there is battery voltage, replace the mirror assembly.  



If there is no voltage, check for: 



An open in the wire.  



Faulty driver's under-dash fuse/relay box.  



Faulty transmission range switch. 

 

2007 Acura RL 

2005-08 ACCESSORIES AND EQUIPMENT Automatic Dimming Inside Mirror - RL

  

me 

 

Friday, June 05, 2009 3:30:38 PM

Page 3 

© 2005 Mitchell Repair Information Company, LLC. 

2005-08 ENGINE PERFORMANCE

Intake Air System - RL 

COMPONENT LOCATION INDEX 

Fig. 1: Identifying Intake Air System Component Location 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

DTC TROUBLESHOOTING 

DTC P1077: IMT VALVE STUCK IN HIGH RPM POSITION 

1. Turn the ignition switch ON (II).  

2. Clear the DTC with the HDS.  

3. Start the engine, and let it idle.  

NOTE:

Before you troubleshoot, record all freeze data and any on-board snapshot, 
and review the general troubleshooting information (see GENERAL 
TROUBLESHOOTING INFORMATION ).

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE Intake Air System - RL

  

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE Intake Air System - RL

  

me 

 

Friday, June 05, 2009 2:36:38 PM

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© 2005 Mitchell Repair Information Company, LLC. 

me 

 

Friday, June 05, 2009 2:36:43 PM

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© 2005 Mitchell Repair Information Company, LLC.