Acura RL. Manual - part 722

Fig. 3: Moonroof Component - Circuit Diagram (2 Of 2) 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

MOONROOF CONTROL UNIT INPUT TEST 

Before troubleshooting the moonroof circuit, troubleshoot the multiplex integrated control system using B-
CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS 
TEST MODE A ). 

If the moonroof works OK manually, but will not work in AUTO, or reverses frequently (pinch detection), 
do the moonroof calibration (see RESETTING THE MOONROOF CONTROL UNIT ) before 
proceeding with the input test. 

1. Turn the ignition switch OFF.  

2. Remove the headliner (see HEADLINER REMOVAL/INSTALLATION ).  

 

2007 Acura RL 

2005-08 ACCESSORIES AND EQUIPMENT Moonroof (Body Electrical) - RL

  

me 

 

Friday, June 05, 2009 3:24:12 PM

Page 3 

© 2005 Mitchell Repair Information Company, LLC. 

3. Disconnect the 10P connector (A) from the moonroof control unit (B). 

Fig. 4: Identifying Moonroof Control Unit And 10P Connector 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

4. Inspect the connector and socket terminals to be sure they are all making good contact. 



If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.  



If the terminals look OK, go to step 5.  

5. Reconnect the connector to the control unit, and make these input tests at the connector. 



If any test indicates a problem, find and correct the cause, then recheck the system.  



If all the input tests prove OK, go to step 6. 

WIRE CAVITY REFERENCE CHART 

Cavity Wire

Test condition

Test: Desired 

result

Possible cause if desired result 

is not obtained

10

BLK Under all conditions

Measure the 
voltage to 
ground: 
There should be 
less then 0.5 V.



Poor ground (G601)  



An open in the wire  

1

GRIM Under all conditions

Measure the 
voltage to 
ground: 
There should be 
battery voltage.



Blown No. 28 (20 A) fuse 
in the driver's under-dash 
fuse/relay box  



An open in the wire  

Moonroof switch in OPEN 

Measure the 
voltage to 



Blown No. 15 (40 A) fuse 
in the under-hood fuse/relay 
box  



Blown No. 7 (10 A) fuse in 

 

2007 Acura RL 

2005-08 ACCESSORIES AND EQUIPMENT Moonroof (Body Electrical) - RL

  

me 

 

Friday, June 05, 2009 3:24:12 PM

Page 4 

© 2005 Mitchell Repair Information Company, LLC. 

6. Disconnect the 10P connector from the control unit, and make these input tests at the connector. 



If any test indicates a problem, find and correct the cause, then recheck the system.  



If all the input tests prove OK, go to step 7. 

WIRE CAVITY REFERENCE CHART 

6

LT 

GRN

(AUTO) or CLOSE 
(AUTO) position

ground: 
There should be 
battery voltage.

the driver's under-dash 
fuse/relay box  



Faulty moonroof switch  



Faulty roof console  



An open in the wire  

7

ORN

Moonroof switch in TILT 
position

Measure the 
voltage to 
ground: 
There should be 
battery voltage.



Blown No. 15 (40 A) fuse 
in the under-hood fuse/relay 
box  



Blown No. 7 (10 A) fuse in 
the driver's under-dash 
fuse/relay box  



Faulty moonroof switch  



Faulty roof console  



An open in the wire  

8

PNK

Moonroof switch in 
CLOSE position

Measure the 
voltage to 
ground: 
There should be 
battery voltage.



Blown No. 15(40 A) fuse in 
the under-hood fuse/relay 
box  



Blown No. 7 (10 A) fuse in 
the driver's under-dash 
fuse/relay box  



Faulty moonroof switch  



Faulty roof console  



An open in the wire  

9

LT 

BLU

Moonroof switch in OPEN 
position

Measure the 
voltage to 
ground: 
There should be 
battery voltage.



Blown No. 15 (40 A) fuse 
in the under-hood fuse/relay 
box  



Blown No. 7 (10 A) fuse in 
the driver's under-dash 
fuse/relay box  



Faulty moonroof switch  



Faulty roof console  



An open in the wire  

Cavity Wire

Test 

condition

Test: Desired result

Possible cause if 

desired result is not 

obtained

Under all 
conditions

Check for continuity between the No. 4 
terminal and driver's MPCS unit connector A 
(40P) No. 8 terminal: 

An open in the wire

 

2007 Acura RL 

2005-08 ACCESSORIES AND EQUIPMENT Moonroof (Body Electrical) - RL

  

me 

 

Friday, June 05, 2009 3:24:12 PM

Page 5 

© 2005 Mitchell Repair Information Company, LLC. 

7. If all the input tests are OK and multiple failures are found, replace the moonroof motor assembly. If 

the problem is related to the key-off operation, go to the driver's MPCS unit input test (see 
CONTROL UNIT INPUT TEST ), and front passenger's MPCS unit input test (see CONTROL 
UNIT INPUT TEST ).  

MOONROOF SWITCH TEST/REPLACEMENT 

1. Remove the roof console (see ROOF CONSOLE REPLACEMENT ).  

2. Remove the HomeLink unit from the top of the roof console.  

3. Remove the five screws from the roof console (A) and remove the rear cover (B). 

Fig. 5: Identifying Rear Cover And Roof Console 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

4. Disconnect the 7P connector (A) from the moonroof switch (B), then remove the two screws and 

switch. 

4

GRY

There should be continuity.

Under all 

conditions

Check for continuity between the No. 4 
terminal and front passenger's MPCS unit 
connector A (28P) No. 4 terminal: 
There should be continuity.

An open in the wire

 

2007 Acura RL 

2005-08 ACCESSORIES AND EQUIPMENT Moonroof (Body Electrical) - RL

  

me 

 

Friday, June 05, 2009 3:24:12 PM

Page 6 

© 2005 Mitchell Repair Information Company, LLC.