sensor ACURA CSX 2006 Service Repair Manual

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Yaw Rate Tuning
Car Status
23-315
Return
Set
Reset CCW CW Tuning
0.0%
ANG- Disp 0°
ReturnCar Status
0
VSP ILL
BACK ILL CANCEL0
0 0
This diagnostic allows you to graphically display
problems with the yaw rate sensor.
 The ANG-Disp value accumulates any differences between the offset and sensor voltages (see Yaw
Rate diagnostic). When the sensor functions properly,
the random changes in these two voltages generally
cancels out, so the value is 0. However if one voltage
is consistently higher than the other, then the ANG-
Disp value accumulates the constant change.
 The Reset button temporarily clears the angular accumulation (ANG-Disp), and clears the display dots.
 Do not touch the CCW, CW, or Set buttons. These are used for factory setup only.
Two tests are explained below. For large problems with
the sensor values, the stationary test usually confirms
whether the sensor is defective. For yaw rate issues
related to driving, do the road test described below. 1. Stationary test: If the VP icon spins in place and the ANG-Disp value slowly increases or decreases in
value, the yaw rate sensor is defective. Replace the
navigation unit.
2. Road test: Drive the vehicle on a very straight road. Enter the diagnostic mode, select Yaw rate, and
touch the Tuning button. While driving down a
straight road, the white dots should trace a straight
line across the screen. However, if you are driving
on a straight road, and you notice the dots
constantly dropping down or heading up as you
drive, the navigation unit’s yaw sensor is defective.
You can touch Reset to clear ANG-Disp, and dotted
lines.
If either test above fails, please enter Yaw rate
sensor defective for the problem description, on
the Navigation core return form.
NOTE: The CCW, CW and Set buttons are disabled,
and cannot be activated. Use this screen to confirm that the navigation unit is
properly receiving input signals. Signals equal to (0) are
OFF, and signals equal to (1) are ON. If the value on the
display does not match the actual vehicle status, then
check the wire carrying the signal.
 VSP-Vehicle Speed Pulse from ECM/PCM (Connector A (24P) terminal No. 15)
a) OFF (0) when vehicle is not moving
b) ON (1) when vehicle is moving
The VSP comes from the ECM/PCM as a dedicated
signal. Internally, the navigation unit compares the
actual VP on the map against street data to adjust the
pulse to speed scaling factor. As this scaling factor
becomes more accurate, the Level gradually increases
from 0 to 10 (see the Tire Calibrate diagnostic screen).  BACK-Reverse indication from taillight relay (Connector C (8P) terminal No. 7)
a) OFF (0) when the shift lever is in any position other
than reverse
b) ON (1) when the shift lever is in reverse
The Back signal is used by the navigation unit to allow
the map screen to show the VP moving backwards
when in reverse. This signal is needed because the
Speed Pulse has no direction indication.
(cont’d)
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µ
µ µ
µ
µ
µ
Vehicle position icon constantly leaves road,
moves erratically, or is displayed very far
from actual vehicle position
YES
NO YES
NO
YES
NO
23-344Navigation System
Symptom Troubleshooting (cont’d)
NOTE:
 Check the vehicle battery condition first.
 Check that the GPS antenna is plugged in.
 This is not the same condition as when driving off- road (or on a fire or logging road). This condition is
caused by a loss of map matching from a bad sensor
input. Check for after market window tinting or other
objects that can block the GPS signal. Always do the
Map matching (see page 23-269) before proceeding
with the troubleshooting.
 Make sure that the correct DVD color and version are installed.
 Inspect the DVD for dirt or damage.
 Check any official Honda service website for more service information about the navigation system.
 Check the GPS signal reception in an open area.
1. Check the GPS icon on the navigation screen.
Do the troubleshooting for GPS icon is white
or not shown (see page 23-341).
Go to step 2. 2. Go into the Self-Diagnosis Mode, and use the Yaw
Rate test (see page 23-314) to check the yaw rate
sensor.
3. Go into the Self-Diagnosis Mode, and use the Car Status test (see page 23-315) to check the vehicle
speed pulse.
The condition may be normal. Check to see if
the condition occurs in the same place in a known-
good vehicle. If it does, the problem could be in the
database.Gotostep4.
If the problem is the yaw rate sensor, replace
the navigation unit (see page 23-355). If the
problem is the vehicle speed pulse, check for an
open in the wire between the navigation unit and
the ECM/PCM (VSP signal). If the wire is OK,
substitute a known-good navigation unit, and retest.
If the problem goes away, replace the original
navigation unit. If the problem is still present,
replace the ECM/PCM.
4. Substitute a known-good navigation unit, and check to see if the problem occurs in the same
place.
The problem is in the database. Report the
problem according to the Navigation System
Manual under Reporting Errors.
Replace the original navigation unit (see page
23-355).
Is the GPS icon white? Ar e t he y aw r at e sensor and v ehi cl e speed pul se
OK ?
Does t he pr obl em occur i n t he same pl ace?
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µ
µ
µ
µ µ
µ
µ
µ
Vehicle icon wanders across the map when
driving (does not follow a displayed road) or
map or vehicle ICON spins
YES
NO
YES
NO YES
NO
YES
NO
23-345
NOTE:
 Check the vehicle battery condition first.
 This is not the same condition as when driving off-road (or on a fire or logging road).
 This condition is caused by a loss of map matching from a bad sensor input. Check for aftermarket or
other objects that can block the GPS signal. Always
perform Map matching (see page 23-269) before
proceeding with the troubleshooting.
 Always check for and resolve all CAN DTCs before troubleshooting the navigation system.
 Verify that the correct navigation unit is installed for this model. Go into the Diagnostic mode, and use
Version (see page 23-316).
 Make sure that the correct DVD color and version are installed.
 Check for aftermarket metallic window tinting.
 Inspect the DVD for dirt or damage.
 Check any official Honda service website for more service information about the navigation system.
 Before troubleshooting, make sure you have anti- theft codes for the navigation system.
 After troubleshooting, enter the anti-theft codes for the navigation system.
 Check the DVD for damage or scratches.
 Check for connectors for poor connections or loose terminals.
1. Check the GPS icon on the navigation screen.
Do the troubleshooting for GPS icon is white
or not shown (see page 23-341).
Go to step 2.
2. Go into the Self-Diagnostic mode, and use the Yaw Rate diagnosis (see page 23- 314) to check the yaw
rate sensor.
Go to step 3.
Replace the navigation unit (see page 23-355). 3. Go into the Diagnostic mode, and use the Car
Status diagnosis (see page 23-315) to check the
vehicle speed pulse (VSP) and the BACK signals.
The problem may be a characteristic of the
system. Check to see if the problem occurs in the
same place in a known-good vehicle. If it does, the
problem could be in the database. Go to step 4.
 If the problem is the vehicle speed pulse, troubleshoot the vehicle speed signal circuit. BLU
wire for open or short. If OK, good ECM/PCM. If
the problem or symptom goes Update the ECM/
PCM (see page 11-227) if it does not have the
latest software or substitute a known-good ECM/
PCM (see page 11-228).
 If the BACK signal is indicated ON (I), when in any shift lever position other than reverse,
troubleshoot the back-up light switch circuit or
MICU (A/T).
4. Substitute a known-good navigation unit (see page 23-355), and check to see if the problem occurs in
thesameplace.
The problem is in the database and should
be considered a characteristic of the system.
Report the problem according to the Navigation
System Owner’s Manual under Reporting Errors
and look for improvements in future databases.
Replace the navigation unit (see page 23-355).
Is the GPS icon white or missing?
I s t he y aw r at e sensor OK ? Ar e t he v ehi cl e speed pul se and t he BACK si gnal s
OK ?
Does t he pr obl em occur i n t he same pl ace?
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Restraints
Restraints
Seat Belts
SRS (Supplemental Restraint System)
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Special Tools . 24-2
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Component Location Index . 24-3
Front Seat Belt Replacement . 24-4
Rear Seat Belt Replacement . 24-7
Inspection . 24-9
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Component Location Index . 24-11
Precautions and Procedures . 24-13
General Troubleshooting Information . 24-22
ODS Unit Initialization . 24-26
ODS Unit Calibration . 24-27
ODS Unit Operation Check . 24-28
Driver’s Seat Position Sensor Operation Check . 24-29
DTC Troubleshooting Index . 24-30
Symptom Troubleshooting Index . 24-34
System Description . 24-35
Circuit Diagram . 24-40
DTC Troubleshooting . 24-48
Symptom Troubleshooting . 24-181
Component Replacement/Inspection After
Deployment . 24-185
Driver’s Airbag Replacement . 24-188
Front Passenger’s Airbag Replacement . 24-189
Side Airbag Replacement . 24-191
Side Curtain Airbag Replacement . 24-192
Airbag and Tensioner Disposal . 24-196
Cable Reel Replacement . 24-200
SRS Unit Replacement . 24-203
Side Impact Sensor (First) Replacement . 24-204
Side Impact Sensor (Second) Replacement . 24-205
Rear Safing Sensor Replacement . 24-206
Front Passenger’s Weight Sensor Replacement . 24-207
ODS Unit Replacement . 24-209
Front Impact Sensor Replacement . 24-210
Driver’s Seat Position Sensor Replacement . 24-211
Passenger’s Airbag Cutoff Indicator Illumination Bulb Test/Replacement . 24-212
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24-11
SRS
Component Location Index
SRS INDICATOR
SIDE AIRBAG
CUTOFF INDICATOR
CABLE REEL
DRIVER’S AIRBAG
FRONT PASSENGER’S AIRBAG
PASSENGER’S AIRBAG CUTOFF INDICATOR
SRS UNIT OPDS SENSOR/SEAT-BACK
FRONT PASSENGER’S
SIDE AIRBAG
FRONT PASSENGER’S
SEAT BELT TENSIONER RIGHT SIDE
IMPACT SENSOR
(FIRST)
ODS UNIT
FRONT PASSENGER’S WEIGHT SENSORS
DRIVER’S SEAT BELT TENSIONER
LEFT SIDE IMPACT SENSOR (FIRST)
DRIVER’S SEAT POSITION SENSOR
DRIVER’S SIDE AIRBAG
DATA LINK
CONNECTOR (DLC) MEMORY ERASE
SIGNAL (MES)
CONNECTOR (2P)
(YELLOW)
FRONT PASSENGER’S SEAT BELT
BUCKLE TENSIONER
DRIVER’S SEAT BELT BUCKLE TENSIONER
(cont’d)
Troubleshooting, page 24-181
Troubleshooting, page 24-183
Replacement, page 24-200
Replacement, page 24-188
Disposal, page 24-196
Replacement, page 24-189
Disposal, page 24-196
Troubleshooting, page 24-184
Bulb Test/Replacement, page 24-212
Replacement, page 24-203 Replacement, page 20-122
Replacement,page 24-191
Disposal, page 24-196
Replacement, page 24-4
Disposal,
page 24-196 Replacement,
page 24-204
Initialization, page 24-26
Calibration, page 24-27
Operation Check, page 24-28
Replacement, page 24-209
Replacement, page 24-207
Replacement, page 24-4
Disposal, page 24-196
Replacement, page 24-204
Operation Check, page 24-29
Replacement, page 24-211
Replacement, page 24-188
Disposal, page 24-196Replacement, page 24-6
Replacement, page 24-6
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24-12SRS
Component Location Index (cont’d)
RIGHT FRONT IMPACT SENSOR
LEFT SIDE CURTAIN AIRBAG
RIGHT SIDE CURTAIN AIRBAG
REAR SAFING SENSOR RIGHT SIDE IMPACT SENSOR (SECOND)
LEFT SIDE IMPACT SENSOR (SECOND)
LEFT FRONT IMPACT SENSOR Replacement, page 24-210
Replacement, page 24-192
Disposal, page 24-196Replacement, page 24-192
Disposal, page 24-196
Replacement, page 24-206 Replacement, page 24-205
Replacement, page 24-205
Replacement, page 24-210
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SRS Unit, Front and Side Impact Sensors,
Driver’s Seat Position Sensor, Front
Passenger’s Weight Sensors and, Rear
Safing Sensor
24-15
NOTE: Some systems store data in memory that is lost
when the battery is disconnected. Before disconnecting
the battery, refer to Battery Terminal Disconnection and
Reconnection (see page 22-68).
 Turn the ignition switch to LOCK (0), disconnect the negative cable from the battery, then wait at least 3
minutes before starting installation or replacement of
the SRS unit, or disconnecting the connectors from
the SRS unit.
 Be careful not to bump or impact the SRS unit, the front impact sensors, the side impact sensors, or the
rear safing sensor whenever the ignition switch is in
ON (II), or for at least 3 minutes after the ignition
switch is turned to LOCK (0).
 During installation or replacement, be careful not to bump (by impact wrench, hammer, etc.) the area
around the SRS unit, the front impact sensors, the
side impact sensors, or the rear safing sensor. The
airbags could accidentally deploy and cause damage
or injury.  After a collision where the front airbag, the side
airbag, or a the seat belt tensioner, the seat belt
buckle tensioner deployed, go to Component
Replacement/Inspection after Deployment (see page
24-185). After a collision where an airbag did not
deploy, inspect for any damage or any deformation
on the SRS unit, the front impact sensors, the side
impact sensors, or the rear safing sensor. If there is
any damage, replace the SRS unit and/or the sensors.
 Do not disassemble the SRS unit, front impact sensors, side impact sensors, driver’s seat position
sensor, front passenger’s weight sensors or rear
safing sensor.
 Always install the SRS unit, driver’s seat position sensor, and all impact sensors and the rear safing
sensor securely with new TORX bolts torqued to 9.8
N·m (1.0 kgf·m, 7.2 lbf·ft).
 Do not spill water or oil on the SRS unit or the any of the sensors, and keep them away from dust.
(cont’d)
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DTC (Diagnostic Trouble Codes) Reading the DTC
Precautions
24-22SRS
General Troubleshooting Information
A
The self-diagnostic function of the SRS system allows it
to locate the causes of system problems and store this
information in memory. For easier troubleshooting, this
data can be retrieved via a data link circuit.
 When you turn the ignition switch to ON (II), the SRS indicator comes on. If it goes off after 6 seconds, the
system is normal, and is not currently detecting any
abnormality.
 If there is an abnormality, the system locates and defines the problem, stores this information in
memory, and turns on the SRS indicator. The data
remains in memory even if the ignition switch is
turned off or the battery is disconnected.
 The data is stored in memory as a diagnostic trouble code (DTC).
 The ‘‘x’’ at the end of each DTC denotes a numeric character (0 thru 9) or an alpha character (A thru F)
that is displayed on the HDS.
 DTCs are either latching or resetting depending on the malfunction. With resetting DTCs, the SRS
indicator goes off the next time the ignition switch is
turned to ON (II), and the system is normal, but the
DTC is still stored. With latching DTCs, the SRS
indicator does not turn to LOCK (0) until the
malfunction is repaired and the DTC is cleared.
 When you connect the HDS to the data link connector (DLC), you can retrieve a more detailed DTC in the
HDS ‘‘SRS’’ menu.
NOTE: Only read DTCs from the SRS menu, not from
the SWS menus. SWS (ODS unit) DTCs are subcodes
of SRS unit DTCs. Only troubleshoot the
corresponding SRS DTCs.
 After reading and recording the DTC, proceed with the troubleshooting procedure for that code.
 Use only a digital multimeter to check the system. Make sure its output is 10 mA (0.01 A) or less when
switched to the smallest value in the ohmmeter range.
A tester with a higher output could damage the
airbag circuit or cause accidental airbag deployment
and possible injury.  Whenever the ignition switch is in ON (II), or has been
turned to LOCK (0), for less than 3 minutes, be careful
not to bump the SRS unit; the airbags could
accidentally deploy and cause damage or injuries.
 Before removing the dashboard wire harness, floor wire harness, disconnect the driver’s airbag
connector, the front passenger’s airbag connector,
both side airbag connectors, both side curtain airbag
connectors and both seat belt tensioner connectors.
 Make sure the battery is fully charged. If the battery is dead or low, electrical measurements may not be
correct.
 Do not touch a tester probe to the terminals in the SRS unit or harness connectors, and do not connect
the SRS unit terminals or the sensor terminals with a
jumper wire. Use only the backprobe set and the
multimeter. Backprobe spring-loaded lock type
connectors correctly.
1. Make sure the ignition switch is in LOCK (0).
2. Connect the HDS to the data link connector (DLC) (A).
3. Turn the ignition switch to ON (II).
4. Make sure the HDS communicates with the vehicle and the SRS unit. If it does not communicate,
troubleshoot the DLC circuit (see page 11-204).
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Checking Front Passenger’s Weight Sensors
After a Vehicle Collision
24-25
A
10. Shake the related wire harnesses and theconnectors, and look for loose connections, poor
pinfits, and poor grounds.
11. Take a test-drive (quick acceleration, quick braking, and cornering), turn the steering wheel fully left
and right, and hold it there for 5 to 10 seconds. If
the problem recurs, the SRS indicator will come on.
12. If you cannot duplicate the concern, ask the client about the conditions when it occurred, or ask the
client to demonstrate the concern.
13. If you cannot duplicate the intermittent failure, the system is OK at this time. 1. Position the front passenger’s seat to the rearmost
position, adjust the seat-back to the forwardmost
position. Do not move it from this position.
2. Drive the vehicle, accelerate to 20 mph (36 km/h), then stop on level ground.
3. Make sure the ignition switch is in LOCK (0).
4. Connect the HDS to the data link connector (DLC) (A).
5. Turn the ignition switch to ON (II).
6. Make sure the HDS communicates with the vehicle and the SRS unit. If does not communicate,
troubleshoot the DLC circuit (see page 11-204).
7. From the SRS inspection menu, select Seat Weight Sensor, then Misc test, then SEAT OUTPUT CHK
and follow the prompts until the front passenger’s
weight sensor operation check is complete.
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24-26SRS
ODS Unit Initialization
A
When a seat-back cover, seat-back cushion, and/or ODS
unit is replaced, initialize the ODS by following the
procedure.
NOTE: A new (uninitialized) ODS unit installed with a
faulty OPDS sensor can cause DTC 85-71.
1. Clear the DTC memory (see page 24-23).
2. Make sure the front passenger’s seat is dry. Set the seat-back in a normal position, and make sure there
is nothing on the seat.
3. Make sure the ignition switch is in LOCK (0) and the MES connector is not shorted.
4. Connect the HDS to the data link connector (DLC) (A). 5. Turn the ignition switch to ON (II).
6. Make sure the HDS communicates with the vehicle
and the SRS unit. If it does not communicate,
troubleshoot the DLC circuit (see page 11-204).
7. From the HDS Main Menu, select SRS, then SRS, then Calibration. In the Calibration Menu, select
ODS INITIALIZATION. Follow the screen prompts to
initialize the ODS unit.
8. Turn the ignition switch to LOCK (0).
9. Disconnect the HDS from the DLC. NOTE: If the ODS unit fails to initialize after several
attempts, replace the OPDS sensor/seat-back and
retry. If the ODS unit continues to fail to initialize,
replace the ODS unit (see page 24-209).
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