Acura RL. Manual - part 620



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

WIRE CAVITY REFERENCE CHART 

6. Reconnect the connectors to the driver's under-dash fuse/relay box, turn the ignition switch ON (II), 

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, go to step 7.  

WIRE CAVITY REFERENCE CHART 

Cavity Wire

Test condition

Test: Desired result

Possible cause if 

desired result is not 

obtained

F5

YEL

Connect battery power to F5 
terminal momentarily.

Check the trunk lid opener 
solenoid operation: 
The trunk lid should open.



Faulty trunk lid 
opener solenoid  



An open in the 
wire  

P29 GRIM

Connect battery power to P29 
terminal momentarily.

Check the keyless buzzer 
operation: 
The buzzer should sound.



Faulty keyless 
buzzer  



An open in the 
wire  

K2

YEL Connect battery power to K2 

(K12) terminal, and K12 (K2) 
terminal to P1 terminal.

Check the door lock actuator 
operation. 
The driver's door lock 
actuator should UNLOCK 
(LOCK).



Faulty driver's 
door lock actuator 



An open in the 
wire  

K12

BLU

E2

BLU Connect battery power to E2

(E8) terminal, and E8 (E2) 
terminal to P1 terminal.

Check the door lock actuator 
operation. 
The left rear door lock 
actuator should LOCK 
(UNLOCK).



Faulty left rear 
door lock actuator 



An open in the 
wire  

E8

YEL

N7

BLU

Connect battery power to N7 
(N9) terminal, and N9 (N7) 
terminal to P1 terminal.

Check the door lock actuator 
operation. 
The front passenger's and 
right rear door lock actuators 
should LOCK (UNLOCK).



Faulty front 
passenger's door 
lock actuator  



Faulty right rear 
door lock actuator 



An open in the 
wire  

N9

YEL

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 



Poor ground (G601)  

 

2007 Acura RL 

2005-08 ACCESSORIES AND EQUIPMENT Keyless/Power Door Locks/Security System - RL

  

me 

 

Friday, June 05, 2009 3:51:13 PM

Page 17 

© 2005 Mitchell Repair Information Company, LLC. 

Driver's MPCS Unit  

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

8. Disconnect driver's MPCS unit connector A(40P) and B(14P). 

less than 0.5 V.



An open in the wire  

P16

RN

Transmission range switch in P 
position.

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



Poor ground(G101)  



Faulty transmission range 
switch  



An open in the wire  

Transmission range switch in 

any other position than P.

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



Faulty transmission range 
switch  



A short to ground in the 
wire  

Q4

BLU

Trunk lid open 

NOTE:

Trunk light bulb removed.

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



Poor ground(G701)  



Faulty trunk lid latch 
switch  



An open in the wire  

Trunk lid closed 

NOTE:

Trunk light bulb removed.

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



Faulty trunk lid latch 
switch  



A short to ground in the 
wire  

Q8

LT 

BLU

Trunk lid outer handle pulled

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



Poor ground(G701)  



Faulty trunk lid outer 
handle switch  



An open in the wire  

Trunk lid outer handle released

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



Faulty trunk lid outer 
handle switch  



A short to ground in the 
wire  

 

2007 Acura RL 

2005-08 ACCESSORIES AND EQUIPMENT Keyless/Power Door Locks/Security System - RL

  

me 

 

Friday, June 05, 2009 3:51:13 PM

Page 18 

© 2005 Mitchell Repair Information Company, LLC. 

Fig. 13: Identifying Driver's MPCS Unit 40P And 14P Connector 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

9. 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 10.  

10. 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 11.  

WIRE CAVITY REFERENCE CHART 

Cavity Wire

Test condition

Test: Desired result

Possible cause if desired 

result is not obtained

A23

PNK

Driver's door lock switch in 
LOCK

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



Faulty driver's door 
lock switch  



An open in the wire  

A27

LT 

BLU

A23

PNK

Driver's door lock switch in 
neutral or UNLOCK

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



Faulty driver's door 
lock switch  



A short to ground in the 
wire  

A27

LT 

BLU

A24

ORN

Driver's door lock switch in 
UNLOCK

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



Faulty driver's door 
lock switch  



An open in the wire  

A27

LT 

BLU

A24

ORN

Driver's door lock switch in 
neutral or LOCK

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



Faulty driver's door 
lock switch  



A short to ground in the 
wire  

A27

LT 

BLU

 

2007 Acura RL 

2005-08 ACCESSORIES AND EQUIPMENT Keyless/Power Door Locks/Security System - RL

  

me 

 

Friday, June 05, 2009 3:51:13 PM

Page 19 

© 2005 Mitchell Repair Information Company, LLC. 

11. Reconnect the connectors to the driver's MPCS unit, turn the ignition switch ON (II), 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, go to step 12.  

WIRE CAVITY REFERENCE CHART 

A4

RED

Under all conditions

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



Faulty driver's door 
lock switch  



Blown bulb  



An open in the wire  

A27

LT 

BLU

Cavity Wire

Test condition

Test: Desired 

result

Possible cause if desired result is not 

obtained

A5

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  

BH

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  

A7

WHT Under all conditions

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



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



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



An open in the wire  

A25

YEL Ignition switch ON (II)

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



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



An open in the wire  

A1

WHT

Driver's door lock knob 
switch in UNLOCK

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



Poor ground (G601)  



Faulty driver's door lock knob 
switch  



An open in the wire  

Driver's door lock knob 

switch in LOCK

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



Faulty driver's door lock knob 
switch  



A short to around in the wire  

A2

PUR

Driver's door lock knob 
switch in LOCK

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



Poor ground (G601)  



Faulty driver's door lock knob 
switch  



An open in the wire  

Driver's door lock knob 

switch in UNLOCK

Measure the 
voltage to ground:
There should be 



Faulty driver's door lock knob 
switch  



A short to ground in the wire  

 

2007 Acura RL 

2005-08 ACCESSORIES AND EQUIPMENT Keyless/Power Door Locks/Security System - RL

  

me 

 

Friday, June 05, 2009 3:51:13 PM

Page 20 

© 2005 Mitchell Repair Information Company, LLC.