Acura RL (1996-2004 year). Manual — part 636
Flowchart No. 2
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.
Are voltages as specified?
• Open or short in the BLU/WHT
wire
• Faulty ignition key switch
NO
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
Are voltages as specified?
• Open or short in the BLK/BLU
wire
• Faulty transmission range switch
NO
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.
• Open or short in the BLU/WHT
wire
Does voltage pulse from O to
about 5 V or more?
NO
YES
Position Button 1:
Check for continuity between the
column control unit 16P connector
B7 and B16 terminals. There
should be continuity with the posi-
tion button 1 pushed and no conti-
nuity with the position button 1
released.
Is continuity as specified?
• Open or short in the BLU/WHT or
YEL/BLU wires
• Faulty driving position memory
switch
NO
YES
Position Button 2:
Check for continuity between the
column control unit 16P connector
B15 and B16 terminals. There
should be continuity with the posi-
tion button 2 pushed and no conti-
nuity with the position button 2
released.
Is continuity as specified?
NO
• Open or short in the BLU/YEL or
YEL/BLU wires
• Faulty driving position memory
switch
YES
NOTE: All connector views are from wire
side of female terminals.
COLUMN CONTROL UNIT
12P CONNECTOR "A"
COLUMN CONTROL UNIT
16P CONNECTOR "B"
(cont'd)
Main Menu
Table of Contents
Driving Position Memory System (DPMS)
Troubleshooting (cont'd)
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 are must be connected.
Are voltages as specified?
• Open or short in the GRY or BRN
wires
• Faulty steering column position
sensors
NO
YES
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
).
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.
• Open or short in the PNK or BRN
wires
• Faulty extend-retract position
sensor
NO
Are voltages as specified?
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
).
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 col-
umn in fully-down position.
NOTE: All column control unit con-
nectors must be connected.
Are voltages as specified?
NO
• Open or short in the BLU or BRN
wires
• Faulty tilt position sensor
YES
NOTE: All connector views are from wire
side of female terminals.
COLUMN CONTROL UNIT
16P CONNECTOR "B"
Main Menu
Table of Contents
CAUTION: Check the sensor carefully
because the motor will run and the
seat will move.
Slide Position Sensor:
Check for voltage between the
seat control unit 12P connector A4
terminal and 16P connector B2
Terminal.
NOTE: Both connectors must be
connected.
NOTE: All connector views are from wire
side of female terminals.
SEAT CONTROL UNIT
12P CONNECTOR "A"
Does voltage pulse between 1 V
or less and 4 V or more with the
slide motor running?
• Open or short in the YEL/GRN or
GRN/BLK wires
• Faulty slide position sensor
NO
YES
Recline Position Sensor:
Check for voltage between the
seat control unit 12P connector A4
terminal and 16P connector B10
terminal.
NOTE: Both connectors must be
connected.
CAUTION: Check the sensor carefully
because the motor will run and the
seat will move.
• Open or short in the WHT/RED or
GRN/BLK wires
• Faulty recline position sensor
NO
Does voltage pulse between 1 V
or less and 4 V or more with the
recline motor running?
Front Up-down Position Sensor:
Check for voltage between the
seat control unit 12P connector A4
terminal and 16P connector B1
terminal.
NOTE: Both connectors must be
connected.
YES
CAUTION: Check the sensor carefully
because the motor will run and the
seat will move.
Does voltage pulse between 1 V or
less and 4 V or more with the front
up-down motor running?
NO
• Open or short in the YEL/BLK or
GRN/BLK wires
• Faulty front up-down position
sensor
YES
CAUTION: Check the sensor carefully
because the motor will run and the
seat will move.
Rear Up-down Position Sensor:
Check for voltage between the
seat control unit 12P connector A4
terminal and 16P connector B9
terminal.
NOTE: Both connectors must be
connected.
• Open or short in the WHT or
GRN/BLK wires
• Faulty rear up-down position
sensor
NO
Does voltage pulse between 1 V
or less and 4 V or more with the
rear up-down motor running?
YES
(cont'd)
SEAT CONTROL UNIT
16P CONNECTOR "B"
Main Menu
Table of Contents
Driving Position Memory System (DPMS)
Troubleshooting (cont'd)
Power Mirror Position Sensor
(Common):
1. Connect the all mirror control
unit connectors.
2. Turn the ignition switch ON (II).
3. Check for voltage between the
mirror control unit 16P connec-
tor B8 and B16 terminals.
Is there 5 V?
NO
• Open or short in the RED/BLK or
BRN/WHT wire
• Faulty power mirror position
sensor
YES
Right Power Mirror Position Sen-
sor (Horizontal):
Check for voltage between the
mirror control unit 16P connector
B7 and B8 terminals. As the mir-
ror tilts from side to side, voltage
changes from about 1 V to 3 V.
• Open or short in the RED/BLK or
GRN wire
• Faulty right power mirror posi-
tion sensor
Are voltages as specified?
NO
YES
Right Power Mirror Position Sen-
sor (Vertical):
Check for voltage between the mir-
ror control unit 16P connector B8
and B15 terminals. As the mirror
swings from up to down, voltage
changes from about 3 V to 1 V.
Are voltages as specified?
• Open or short in the RED/BLK or
GRY wire
- Faulty left power mirror posi-
tion sensor
NO
YES
Left Power Mirror Position Sen-
sor (Horizontal):
Check for voltage between the
mirror control unit 16P connector
B6 and B8 terminals. As the mir-
ror tilts from up to down, voltage
changes from about 1 V to 3 V.
Are voltages as specified?
NO
• Open or short in the RED/BLK or
GRN/WHT wire
• Faulty left power mirror posi-
tion sensor
YES
NOTE: All connector views are from wire
side of female terminals.
MIRROR CONTROL UNIT
16P CONNECTOR "B"
Main Menu
Table of Contents
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