Content .. 617 618 619 620 ..

Acura RL. Manual - part 619

DTC B2181: DRIVER'S DOOR LOCK KNOB SWITCH LOCK/UNLOCK SIGNAL ERROR

1. Clear the DTCs with the HDS.

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

3. Lock and unlock the driver's door with the driver's door lock knob switch.

4. Check for DTCs with the HDS.

Is DTC B2181 indicated?

YES - Go to step 5.

NO - Intermittent failure, the driver's door lock knob switch system is OK at this time. Check for
loose or poor connections.

5. Select DOOR LOCK from the BODY ELECTRICAL SYSTEM SELECT menu, and enter the DATA

LIST.

6. Check the ON/OFF information of the Driver's Door Lock Knob Switch (LOCK) and Driver's Door

Lock Knob Switch (UNLOCK) in the DATA LIST.

Does the Driver's Door Lock Knob Switch (LOCK) information indicate ON and Driver's Door Lock
Knob Switch (UNLOCK) information indicate OFF with the door lock knob switch is in the LOCK
position, and does the Driver's Door Lock Knob Switch (LOCK) information indicate OFF and
Driver's Door Lock Knob Switch (UNLOCK) information indicate ON with the door lock knob switch
is in the UNLOCK position?

YES - Replace the driver's MPCS unit.

NO - Go to step 7.

7. Disconnect the driver's door lock actuator 10P connector.

8. Check the ON/OFF information of the Driver's Door Knob Switch (LOCK) and Driver's Door Lock

Knob Switch (UNLOCK) in the DATA LIST.

Are both information indicators OFF?

YES - Faulty driver's door lock knob switch; replace the driver's door lock actuator assembly.

NO - Go to step 9.

9. Turn the ignition switch OFF.

10. Disconnect driver's MPCS unit connector A (40P).

11. Check for continuity between body ground and the driver's door lock actuator 10P connector

terminals No. 6 and No. 7 individually.

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 Keyless/Power Door Locks/Security System - RL

Friday, June 05, 2009 3:51:13 PM

Page 13

Fig. 10: Checking Continuity Between Body Ground And Driver's Door Lock Actuator
Terminals No. 6 And No. 7
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Repair a short to ground in the wire.

NO - Replace the driver's MPCS unit.

DTC B2186: FRONT PASSENGER'S DOOR LOCK SWITCH LOCK/UNLOCK SIGNAL ERROR

1. Clear the DTCs with the HDS.

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

3. Lock and unlock the front passenger's door with the front passenger's door lock switch operation.

4. Check for DTCs with the HDS.

Is DTC B2186 indicated?

YES - Go to step 5.

NO - Intermittent failure, the front passenger's door lock switch system is OK at this time. Check for
loose or poor connections.

5. With the front passenger's door lock switch in the neutral position, select the DOOR LOCK from the

BODY ELECTRICAL SYSTEM SELECT menu, and enter the DATA LIST.

6. Check the ON/OFF information of the Front Passenger's Door Lock Switch (LOCK) and Front

Passenger's Door Lock Switch (UNLOCK).

Are both information indicators OFF?

YES - Go to step 7.

NO - Go to step 8.

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 Keyless/Power Door Locks/Security System - RL

Friday, June 05, 2009 3:51:13 PM

Page 14

7. Operate the front passenger's door lock switch in the LOCK and UNLOCK positions, and check the

ON/OFF information of the Front Passenger's Door Lock Switch (LOCK) and Front Passenger's Door
Lock Switch (UNLOCK).

Are both the Front Passenger's Door Lock Switch (LOCK) and Front passenger's Door Lock Switch
(UNLOCK) information indicators ON at the same time when the door lock switch is in the LOCK or
UNLOCK position?

YES - Repair short between the wires.

NO - Replace the front passenger's MPCS unit.

8. Disconnect the front passenger's door lock switch 4P connector.

9. Check the ON/OFF information of the Assistant Side Remote Door Lock Switch (LOCK) and

Assistant Side Remote Door Lock Switch (UNLOCK).

Are both information indicators OFF?

YES - Faulty front passenger's door lock switch; replace it.

NO - Go to step 10.

10. Turn the ignition switch OFF.

11. Disconnect front passenger's MPCS unit connector A(28P).

12. Check for continuity between body ground and the front passenger's door lock switch 4P connector

terminals No. 3 and No. 4 individually.

Fig. 11: Checking Continuity Between Body Ground And Front Passenger's Door Lock Switch
Terminals No. 3 And No. 4
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Repair a short to ground in the wire.

NO - Replace the front passenger's MPCS unit.

CONTROL UNIT INPUT TEST

2007 Acura RL

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

Friday, June 05, 2009 3:51:13 PM

Page 15

MICU

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.

*Connector view shown rotated 180 "from actual position in the under-dash fuse/relay box.

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.

NOTE:

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

NOTE:

All connector views are wire side of female terminals.

2007 Acura RL

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

Friday, June 05, 2009 3:51:13 PM

Page 16

Content .. 617 618 619 620 ..