Acura RL (1996-2004 year). Manual — part 648

Control Unit Input Test

NOTE:
• Before testing, go to the Troubleshooting Guide (see page

23-244

). Be sure to go through self-diagnosis function

modes 1 and 2 (see pages

23-248

and

23-252

).

• All connector views are from the wire side of female terminals unless otherwise noted.

Multiplex Control Unit (Passenger's):

1. Remove the right kick panel (see

section 20

).

2. Disconnect the 22P and 26P connectors, then remove the passenger's unit (see page

23-246

).

3. 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, make the following input tests at the connector.

If a test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, the power window master switch must be faulty; replace it.

Disconnect the connectors from the passenger's unit.

Cavity Wire Test condition Test: Desired result

Possible cause if result is not obtained

B10

B21

BLU/RED

LT

GRN/BLK

Turn the ceiling light
switch MIDDLE and all

doors closed

All doors closed

Connect to ground:
Ceiling light should come on.

Connect to ground:
Courtesy lights should come on.

• Blown No. 57 (20 A) fuse in the

under-hood fuse/relay box

• Faulty ceiling light
• An open in the wire

• Faulty courtesy light
• An open in the wire

Reconnect the connectors to the passenger's unit.

Cavity Wire

Test condition

Test: Desired result

Possible cause if result is not obtained

A23

B18

GRN/RED

GRN/ORN

Front passenger's door

opened

Front passenger's door
closed

Right rear door opened

Right rear door closed

Check for voltage to ground:

There should be less than 1 V.

Check for voltage to ground:
There should be 5 V or more.

Check for voltage to ground:
There should be less than 1 V.

Check for voltage to ground:
There should be 5 V or more.

• Faulty front passenger's door

switch

• Poor ground (G401, G402)
• An open in the wire

• Faulty right rear door switch
• Poor ground (G601)
• An open in the wire

Main Menu

Table of Contents

Entry Light Control System

Control Unit Input Test (cont'd)

NOTE:
• Before testing, go to the Troubleshooting Guide (see page

23-244

).

• All connector views are from the wire side of female terminals unless otherwise noted.

Multiplex Control Unit (Driver's):

1. Remove the under-dash fuse/relay box (see page

23-66

).

2. Remove the driver's unit from the under-dash fuse/relay box (see page

23-247

).

3. 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, make the following input tests at the connector and the fuse/relay box socket.

If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, the control unit must be faulty; replace it.

*2: Canada

Reconnect the connectors to the unit.

Cavity Wire

Test condition

Test: Desired result

Possible cause if result is not obtained

C9

C15

BLU/WHT

GRN/YEL

Ignition key out of the
ignition switch.

Ignition key insert the
ignition switch.

Left rear door opened

Left rear door closed

Check for voltage to ground:
There should be less than 1 V.

Check for voltage to ground:
There should be 5 V or more.

Check for voltage to ground:
There should be less than 1 V.

Check for voltage to ground:

There should be 5 V or more.

• Faulty ignition key switch
• Poor ground (G401, G402)
• An open in the wire

• Faulty left rear door switch
• Poor ground (G401, G402)
• An open in the wire

Main Menu

Table of Contents

NOTE:
• Before testing, go to the Troubleshooting Guide (see page

23-244

). Be sure to go through self-diagnosis function

modes 1 and 2 (see pages

23-248

and

23-252

).

• All connector views are from the wire side of female terminals unless otherwise noted.

Multiplex Control Unit (Door):

1. Remove the driver's door panel, and disconnect the 20P connector from the door unit (see page

23-245

).

2. 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, make the following input tests at the connector.

If a test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, the power window master switch must be faulty; replace it.

Reconnect the connector to the door unit.

Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained

Driver's door opened

Driver's door closed

GRN/BLU

5

Check for voltage to ground:

There should be 5 V or more.

Check for voltage to ground:
There should be less than 1 V.

• Faulty driver's door switch
• Poor ground (G401, G402)
• An open in the wire

Main Menu

Table of Contents

Entry Light Control System

Front Ceiling Light Test

1. Turn the light switch OFF.

2. Pry off the lens.

Rear Ceiling Light Test

1. Turn the light switch OFF.

2. Pry off the lens.

BULBS

(5 W x 3)

SCREW

HOUSING

LENS

3. Remove the two screws from the housing.

4. Disconnect the 4P connector, and remove the hous-

ing.

5. Check for continuity between the terminals in each

switch position according to the table.

3. Remove the two screws from the housing.

4. Disconnect the 4P connector, and remove the hous-

ing.

5. Check for continuity between the terminals in each

switch position according to the table.

HOUSING

SCREW

BULBS

(5 W x 3)

LENS

Main Menu

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