Acura RL. Manual - part 601

Fig. 11: Identifying Roof Console And 28P 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. With the connector 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. 

WIRE CAVITY REFERENCE CHART 

Cavity Wire

Test 

condition

Test: Desired result

Possible cause if desired 

result is not obtained

18

PNK

Under all 
conditions

Check for continuity between the No. 
18 terminal and driver's under-dash 
fuse/relay box connector W (5P) No. 4 
terminal: There should be continuity.

An open in the wire

 

2007 Acura RL 

2005-08 ACCESSORIES AND EQUIPMENT Interior Lights - RL

  

me 

 

Friday, June 05, 2009 3:31:24 PM

Page 11 

© 2005 Mitchell Repair Information Company, LLC. 

6. Reconnect the connector to the roof console, 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, the roof console must be faulty; replace it (see ROOF 
CONSOLE REPLACEMENT). 

WIRE CAVITY REFERENCE CHART 

26

GRY

Under all 
conditions

Check for continuity between the No. 
18 terminal and driver's under-dash 
fuse/relay box connector Q (14P) No. 
12 terminal: There should be continuity.

An open in the wire

20

YEL

Under all 
conditions

Attach to ground: The right rear map 
light should come on.



Blown No. 6 (7.5A) 
fuse in the driver's 
under-dash 
fuse/relay box  



Faulty rear map light 



Blown bulb  



An open in the wire  

25

WHT

Under all 
conditions

Attach to ground: The left rear map 
light should come on.



Blown No. 6 (7.5A) 
fuse in the driver's 
under-dash 
fuse/relay box  



Faulty rear map light 



Blown bulb  



An open in the wire  

Cavity Wire

Test condition

Test: Desired result

Possible cause if desired result is 

not obtained

12

BLK

Under all 
conditions

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



Poor ground (G601)  



An open in the wire  

13

BLK

Under all 
conditions

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



Poor ground (G601)  



An open in the wire  

28

WHT

Under all 
conditions

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



Blown No. 6 (7.5A) fuse in 
the driver's under-dash 
fuse/relay box  



An open in the wire  

17

LT 

BLU

Right rear map 
light switch ON

Measure the voltage to 
ground: There should be 
less than 1 V.



Poor ground(G601)  



Faulty rear map light  



An open in the wire  

Right rear map 

light switch OFF

Measure the voltage to 
ground: There should be 5 
V or more.



Faulty rear map light  



A short to ground in the 
wire  

Left rear map 

Measure the voltage to 



Poor ground(G601)  

 

2007 Acura RL 

2005-08 ACCESSORIES AND EQUIPMENT Interior Lights - RL

  

me 

 

Friday, June 05, 2009 3:31:24 PM

Page 12 

© 2005 Mitchell Repair Information Company, LLC. 

MICU INPUT TEST 

1. Turn the ignition switch OFF.  

2. Remove the left kick panel (see TRIM REMOVAL/INSTALLATION - DOOR AREAS ).  

3. Disconnect the driver's under-dash fuse/relay box connectors. 

Fig. 12: Identifying Driver's Under-Dash Fuse/Relay Box Connectors Terminals 
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. 

WIRE CAVITY REFERENCE CHART 

19

BLU

light switch ON

ground: There should be 
less than 1 V.



Faulty rear map light  



An open in the wire  

Left rear map 

light switch OFF

Measure the voltage to 
ground: There should be 5 
V or more.



Faulty rear map light  



A short to ground in the 
wire  

NOTE:

All connector views are wire side of female terminals.

Cavity Wire Test condition

Test: Desired result

Possible cause if desired 

result is not obtained

P8

PNK

Under all 
conditions

Attach to ground: The driver's 
and front passenger's foot 
lights should come on.



Blown No. 6 (7.5A) fuse 
in the driver's under-dash 
fuse/relay box  



Faulty foot light  



An open in the wire  

 

2007 Acura RL 

2005-08 ACCESSORIES AND EQUIPMENT Interior Lights - RL

  

me 

 

Friday, June 05, 2009 3:31:24 PM

Page 13 

© 2005 Mitchell Repair Information Company, LLC. 

6. Reconnect the connectors to the driver's under-dash fuse/relay box, and 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, the MICU must be faulty, replace the driver's under-dash 
fuse/relay box (see DRIVER'S UNDER-DASH FUSE/RELAY BOX (MICU) 
REMOVAL/INSTALLATION ). 

WIRE CAVITY REFERENCE CHART 

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 connector A (40P). 

H14 ORN

Under all 
conditions

Attach to ground: The ignition 
key light should come on.



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



Faulty ignition key light  



An open in the wire  

Q12 GRY

Interior lights 
switch in DOOR 
position

Attach to ground: The 
individual map lights should 
come on.



Blown No. 6 (7.5A) fuse 
in the driver's under-dash 
fuse/relay box  



Faulty map light  



Faulty roof console  



An open in the wire  

W4

PNK

Interior lights 
switch in DOOR 
position

Attach to ground: The 
individual map lights should 
come on.



Blown No. 6 (7.5A) fuse 
in the driver's under-dash 
fuse/relay box  



Faulty map light  



Faulty roof console  



An open in the wire  

Cavity Wire Test condition

Test: Desired result

Possible cause if desired 

result is not obtained

P1

BRN

Under all 
conditions

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



Poor ground (G502)  



An open in the wire  

E9

BLK Under all 

conditions

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



Poor ground (G601)  



An open in the wire  

H9

BLK

 

2007 Acura RL 

2005-08 ACCESSORIES AND EQUIPMENT Interior Lights - RL

  

me 

 

Friday, June 05, 2009 3:31:24 PM

Page 14 

© 2005 Mitchell Repair Information Company, LLC.