Content .. 633 634 635 636 ..

Acura RL (1996-2004 year). Manual - part 635

Steering Column Control Unit:

Cavity Wire Test condition

Test: Desired result

Possible cause if result is not obtained

A12

BLK/YEL

WHT/YEL

RED/YEL

BLK

LT GRN/RED

BLK/WHT

Ignition switch ON (II)

Under all conditions

Ignition switch ON (II),
and do not operate DPMS

Check for voltage to ground:
There should be battery voltage.

Check for continuity to ground:
There should be continuity.

Check for voltage to ground:
There should be no voltage.

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

• Blown No. 20 (20 A) fuse in the under-

dash fuse/relay box

• An open in the wire

• Blown No. 56 (7.5 A) fuse in the under-

hood fuse/relay box

• An open in the wire

• Blown No. 54 (20 A) fuse in the under-

hood fuse/relay box

• An open in the wire

• Poor ground (G401, G402 or G251)
• An open in the wire

• An open or short in the wire

Power Seat Control Unit:

Cavity Wire Test condition

Test: Desired result

Possible cause if result is not obtained

C12

A12

BLK/YEL

WHT/YEL

RED/WHT

WHT/RED

BLK

LT GRN/RED

BLK/WHT

Ignition switch ON (II)

Under all conditions

Ignition switch ON (II),
and do not operate DPMS

Check for voltage to ground:
There should be battery voltage.

Check for continuity to ground:
There should be continuity.

Check for voltage to ground:
There should be no voltage.

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

• Blown No. 20 (20 A) fuse in the under-

dash fuse/relay box

• An open in the wire

• Blown No. 56 (7.5 A) fuse in the under-

hood fuse/relay box

• An open in the wire

• Blown No. 11 (20 A) fuse in the under-

dash fuse/relay box

• An open in the wire

• Blown No. 8 (20 A) fuse in the under-

dash fuse/relay box

• An open in the wire

• Poor ground (G401, G402 or G251)
• An open in the wire

• Poor ground (G651, G681)
• An open in the wire

• An open or short in the wire

Power Mirror Control Unit:

Cavity Wire Test condition

Test: Desired result

Possible cause if result is not obtained

A11

A12

RED/YEL

(WHT/YEL)

WHT/YEL

YEL/BLK

BLK

LT GRN/RED

BLK/WHT

Under all conditions

Ignition switch ON (II)

Under all conditions

Ignition switch ON (II),
and do not operate DPMS

Check for voltage to ground:
There should be battery voltage.

Check for continuity to ground:
There should be continuity.

Check for voltage to ground:
There should be no voltage.

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

• Blown No. 54 (20 A) or No. 56 (7.5 A)

fuse in the under-dash fuse/relay box

• An open in the wire

• Blown No. 56 (7.5 A) fuse in the under-

hood fuse/relay box

• An open in the wire

• Blown No. 19 (7.5 A) fuse in the under-

dash fuse/relay box

• An open in the wire

• Poor ground (G401, G402 or G251)
• An open in the wire

• An open or short in the wire

Main Menu

Table of Contents

To page

23-207

Driving Position Memory System (DPMS)

Troubleshooting

Flowchart No. 1

Ignition Key Switch:
Check for voltage between the col-
umn control unit 12P connector A4
terminal and body ground. There
should be 1 V or less with the igni-
tion key inserted and 4 V or more
with the ignition key removed.

• Open or short in the BLU/WHT

wire

- Faulty ignition key switch

Are voltages as specified?

YES

Transmission Range Switch:
Check for voltage between the col-

umn control unit 12P connector

A10 terminal and body ground.
There should be 1 V or less with
the shift lever in or

more with the shift lever in any
other position than

• Open or short in the BLK/BLU

wire

- Faulty transmission range switch

Are voltages as specified?

YES

Steering Column Auto Switch:
Check for voltage between the
column control unit 16P connec-
tor B4 terminal and body ground.
There should be 1 V or less with
the AUTO switch ON and 4 V or

more with the AUTO switch OFF.

Are voltages as specified?

• Open or short in the LT BLU wire
- Faulty AUTO switch

YES

Vehicle Speed Sensor (VSS):

1. Raise the front of the vehicle,

support it with the safety
stands, put it in neutral, and
slowly rotate one wheel with
other wheel blocked.

2. Check for voltage between the

column control unit 12P con-

nector A11 terminal and body

ground.

Does voltage pulse from O to

about 5 V or more?

• Open or short in the BLU/WHT

wire

- Faulty VSS (see page

23-86

)

YES

Steering Column Position Sensor:
Check for voltage between the
column control unit 16P connec-
tor B2 and B10 terminals.

NOTE: All column control unit

connectors must be connected.

Is there 5 V?

NO • Open or short in the GRY or BRN

wires

• Faulty steering position sensors

YES

COLUMN CONTROL UNIT

16P CONNECTOR "B"

COLUMN CONTROL UNIT

12P CONNECTOR "A"

COLUMN CONTROL UNIT

16P CONNECTOR "B"

NOTE: All connector views are from wire
side of female terminals.

COLUMN CONTROL UNIT

12P CONNECTOR "A"

Main Menu

Table of Contents

From page

23-206

Steering Column Position Sensor

(Extend-retract):

Check for voltage between the col-
umn control unit 16P connector B9
and B10 terminals. There should

be 2.5 V or more with the steering
column in fully-extended position
and 2.5 V or less with the steering

column in fully-retracted position.

NOTE: All column control unit con-
nectors must be connected.

NOTE: If necessary, apply power and
ground to the extend-retract motor to
move the steering column to the fully-
extended and fully-retracted positions
(see page

23-226

Are voltages as specified?

• Open or short in the PNK or BRN

wires

• Faulty extend-retract position

sensor

YES

NOTE: If necessary, apply power and
ground to the tilt motor to move the
steering column to the fully-up and
fully-down positions (see page

23-226

Steering Column Position Sensor
(Tilt):
Check for voltage between the col-

umn control unit 16P connector B1
and B10 terminals. There should
be 2.5 V or more with the steering

column in fully-up position and
2.5 V or less with the steering
column in fully-down position.

NOTE: All column control unit con-
nectors must be connected.

Are voltages as specified?

• Open or short in the BLU or BRN

wires

• Faulty tilt position sensor

Extend-retract Motor (Extend):
Check for voltage between the
extend-retract motor 2P connec-
tor No. 2 terminal and body
ground. There should be 12 V
with the extend switch pushed
and no voltage with the extend
switch released.

Are voltages as specified?

• Open or short in the PNK/BLK

wire

• Faulty extend switch

YES

Extend-retract Motor (Retract):
Check for voltage between the
extend-retract motor 2P connec-
tor No. 1 terminal and body
ground. There should be 12 V
with the retract switch pushed

and no voltage with the retract
switch released.

Are voltages as specified?

• Open or short in the GRY/RED

wire

• Faulty retract switch

To page

23-208

YES

(cont'd)

NOTE: All connector views are from wire
side of female terminals.

COLUMN CONTROL UNIT

16P CONNECTOR "B"

EXTEND-RETRACT MOTOR
2P CONNECTOR

Main Menu

Table of Contents

Driving Position Memory System (DPMS)

Troubleshooting (cont'd)

From page

23-207

Tilt Motor (Up):
Check for voltage between the tilt

motor 3P connector No. 3 terminal
and body ground. There should be
12V with the tilt-up switch pushed
and no voltage with the tilt-up
switch released.

• Open or short in the BRN wire
• Faulty tilt switch

Are voltages as specified?

YES

Tilt Motor (Down):

Check for voltage between the tilt
motor 3P connector No. 1 terminal
and body ground. There should be
12 V with the tilt-down switch
pushed and no voltage with the
tilt-down switch released.

• Open or short in the LT GRN

wire

• Faulty tilt switch

Are voltages as specified?

YES

Test the extend-retract motor (see

page

23-226

Does the motor run smoothly
and without noise?

Replace the extend-retract motor.

YES

Test the tilt motor (see page

23-226

Does the motor run smoothly
and without noise?

Replace the tilt motor.

YES

Substitute a known-good column
control unit, and recheck. If the
systems now work OK, replace
the original column control unit.

TILT MOTOR 3P CONNECTOR

Wire side of
female terminals

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Content .. 633 634 635 636 ..