Acura RL. Manual - part 735

Is DTC B2189 indicated?  

YES - Replace the driver's power window motor. 

NO - Replace the driver's MPCS unit. 

DTC B2190: FRONT PASSENGER'S POWER WINDOW POSITION DETECT CIRCUIT ERROR 

1. Clear the DTCs with the HDS.  

2. Turn the ignition switch OFF, and then back ON (II).  

3. Open and close the front passenger's window by using the front passenger's power window switch 

manually.  

4. Check for DTCs with the HDS. 

Is DTC B2177 or B2178 also indicated?  

YES - Troubleshoot the indicated DTC(s) first. 

NO - Go to step 5. 

5. Reset the power window control unit (see RESETTING THE POWER WINDOW CONTROL 

UNIT ).  

6. Clear the DTCs with the HDS.  

7. Turn the ignition switch OFF, and then back ON (II).  

8. Open and close the front passenger's power window by using the front passenger's power window 

switch manually.  

9. Check for DTCs with the HDS. 

Is DTC B2190 indicated?  

YES - Go to step 10. 

NO - The system is OK at this time. 

10. Turn the ignition switch OFF.  

11. Substitute a known-good passenger's MPCS unit.  

12. Clear the DTCs with the HDS.  

13. Turn the ignition switch OFF, and then back ON (II).  

14. Open and close the front passenger's power window by using the front passenger's power window 

switch manually.  

15. Check for DTCs with the HDS. 

Is DTC B2190 indicated?  

NOTE:

If you are troubleshooting multiple DTCs, be sure to follow the instructions 
in B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN 
SYSTEM DIAGNOSIS TEST MODE A ).

 

2007 Acura RL 

2005-08 ACCESSORIES AND EQUIPMENT Power Windows - RL

  

me 

 

Friday, June 05, 2009 3:20:28 PM

Page 44 

© 2005 Mitchell Repair Information Company, LLC. 

YES - Replace the front passenger's window motor.

NO - Replace the passenger's MPCS unit. 

DTC B2191: FRONT PASSENGER'S MPCS UNIT INTERNAL (EEPROM) ERROR 

1. Clear the DTCs with the HDS.  

2. Turn the ignition switch OFF, and then back ON (II).  

3. Check for DTCs with the HDS. 

Is DTC B2191 indicated?  

YES - Replace the front passenger's MPCS unit. 

NO - Intermittent failure, the system is OK at this time. 

DRIVER'S MPCS UNIT INPUT TEST 

1. Turn the ignition switch OFF.  

2. Remove the driver's door panel (see FRONT DOOR PANEL REMOVAL/INSTALLATION ).  

3. Disconnect driver's MPCS unit (A) connectors A (40P) and B (14P). 

NOTE:

If you are troubleshooting multiple DTCs, be sure to follow the instructions 
in B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN 
SYSTEM DIAGNOSIS TEST MODE A ).

 

2007 Acura RL 

2005-08 ACCESSORIES AND EQUIPMENT Power Windows - RL

  

me 

 

Friday, June 05, 2009 3:20:28 PM

Page 45 

© 2005 Mitchell Repair Information Company, LLC. 

Fig. 48: Identifying MPCS Unit Connectors (40P) And (14P) 
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. With the connectors still disconnected, make these input tests at the connectors. 



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.  

TEST CONDITION AND POSSIBLE CAUSE REFERENCE CHART 

Cavity Wire

Test condition

Test: Desired result

Possible cause if 

desired result is not 

 

2007 Acura RL 

2005-08 ACCESSORIES AND EQUIPMENT Power Windows - RL

  

me 

 

Friday, June 05, 2009 3:20:28 PM

Page 46 

© 2005 Mitchell Repair Information Company, LLC. 

obtained

A8

GRY

Driver's under-dash 
fuse/relay box connector 
H (14P) and power 
window master switch 6P 
connector disconnected

Check for continuity between the 
A8 terminal and driver's under-
dash fuse/relay box connector H 
(14P) No. 4 terminal, and A8 
terminal and power window 
master switch 6P connector No. 6 
terminal: 
There should be continuity.

An open in the wire

Check for continuity to ground: 

There should be no continuity.

A short to ground in 
the wire

B10

PUR

Driver's power window 
switch in DOWN 
position

Check for continuity between the 
terminals: 
There should be no continuity.



Faulty power 
window master 
switch  



A short to 
ground in the 
wire  

B12

ORN

B10

PUR

Driver's power window 
switch released

Check for continuity between the 
terminals: 
There should be continuity.



Faulty power 
window master 
switch  



An open in the 
wire  

B12

ORN

B10

PUR

Driver's power window 
switch in DOWN 
position

Check for continuity between the 
terminals: 
There should be continuity.



Faulty power 
window master 
switch  



An open in the 
wire  

B13

PNK

B10

PUR

Driver's power window 
switch released

Check for continuity between the 
terminals: 
There should be no continuity.



Faulty power 
window master 
switch  



A short to 
ground in the 
wire  

B13

PNK

B9

LTGRN

Driver's power window 
switch in UP position

Check for continuity between the 
terminals: 
There should be continuity.



Faulty power 
window master 
switch  



An open in the 
wire  

B2

LTBLU

B9

LTGRN

Driver's power window 
switch released

Check for continuity between the 
terminals: 
There should be no continuity.



Faulty power 
window master 
switch  



A short to 
ground in the 
wire  

B2

LTBLU



Blown No. 27 
(30A) fuse in the 

 

2007 Acura RL 

2005-08 ACCESSORIES AND EQUIPMENT Power Windows - RL

  

me 

 

Friday, June 05, 2009 3:20:28 PM

Page 47 

© 2005 Mitchell Repair Information Company, LLC.