ignition ACURA CSX 2006 Service Repair Manual

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The HFL system is locked and the pass code
has been lost or forgotten HFL message cannot be heard or are weak
YES
NO
YES
NO
YES
NO
23-38323-383
1. Connect the HDS to the DLC.
2. Turn the ignition switch to ON (II).
3. From the Body Electrical menu, select
HandsFreeLink.
4. Select Miscellaneous Tests, then select Pass code reset.
5. Follow the HDS prompts to reset the pass code. 1. Turn the ignition switch to ON (II).
2. Check that the audio system is operating normally,
and the speaker sound l evels from different audio
sources (AM/FM, CDs, etc.).
Go to step 3.
Refer to the audio system symptom
troubleshooting.
3. Check the navigation voice recognition system.
Go to step 4.
Refer to the navigation system
troubleshooting.
4. Check the audio system when HFL messages are played.
Go to step 5.
Go to step 10.
5. Turn the ignition switch to LOCK (0).
6. Disconnect navigation unit connector B (24P) and the HandsFreeLink control unit 28P connector.
(cont’d)
Does the audio system work normally, and is theaud i o out put f r om t he speak er nor mal w henpl ay i ng v ar i ous aud i o sour ces?
Does the voice recognition system work properly?
Dose t he aud i o sy st em mut e w hen H F L messagesar e bei ng pl ay ed ?
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YES
NO YES
NO
23-385
TELM SIG (BLU)
HANDSFREELINK CONTROL UNIT 28P CONNECTOR
TELM SIG (PNK)
TELM SIG (BLU)
TELM SIG (PNK)
NAVIGATION UNIT CONNECTOR B (24P) HANDSFREELINK CONTROL UNIT 28P CONNECTOR
HFL MUTE (LT BLU)
9. Check for continuity between HandsFreeLinkcontrol unit 28P connector terminal No. 11 and
No. 25 and navigation unit connector B (24P)
terminal No. 21 and No. 9.
Substitute a known-good HandsFr eeLink
control unit (see page 23-388), and recheck. If the
symptom/indication goes away, replace the
original HandsFreeLink control unit. If the
symptom/indication is still present, replace the
navigation unit (see page 23-355).
Open in the wire(s) between HandsFreeLink
control unit and the navigation unit. Replace the
affected shielded harness. 10. Turn the ignition switch to LOCK (0).
11. Disconnect navigation unit connector B (24P) and
the HandsFreeLink control unit 28P connector.
12. Check for continuity between body ground and HandsFreeLink control unit 28P connector terminal
No. 3.
Repair short to body ground in the wire
between the HandsFreeLink control unit and the
navigation unit.
Go to step 13.
(cont’d)
Wire side of female terminalsWire side of female terminals Wire side of female terminals
I s t her e cont i nui t y ?
I s t her e cont i nui t y ?
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YES
NO YES
NO
The Bluetooth icon does not display
(the Bluetooth phone is linked)
23-38623-386HandsFreeLink System
Symptom Troubleshooting (cont’d)
HANDSFREELINK CONTROL UNIT 28P CONNECTOR
HFL MUTE (LT BLU)
NAVIGATION UNIT CONNECTOR B (24P) HFL MUTE (LT BLU)
HANDSFREELINK CONTROL UNIT 28P CONNECTOR
HFL ICON (LT GRN)
13. Check for continuity between HandsFreeLinkcontrol unit 28P connector terminal No. 3 and
navigation unit connector B (24P) terminal No. 8.
Substitute a known-good HandsFr eeLink
control unit (see page 23-388), and recheck. If the
symptom/indication goes away, replace the
original HandsFreeLink control unit. If the
symptom/indication is still present, replace the
navigation unit (see page 23-355).
Repair open in the wire between
HandsFreeLink control unit and the navigation
unit. 1. Turn the ignition switch to ON (II).
2. Disconnect navigation unit connector B (24P) and
the HandsFreeLink control unit 28P connector.
3. Check for continuity between body ground and HandsFreeLink control unit 28P connector terminal
No. 19.
Repair short to body ground in the wire
between the HandsFreeLink control unit and the
navigation unit.
Go to step 4.
Wire side of female terminals
Wire side of female terminals Wire side of female terminals
Is there continuity?
Is there continuity?
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Cavity Wire Test condition Test: Desired resultPossible cause if result is not obtained
Cavity Wire Test condition Test: Desired resultPossible cause if result is not obtained
23-388HandsFreeLink System
Control Unit Input Test/Replacement
B
A
WHT PUR
PNK
BLK
1. Remove the center console (see page 20-92).
2. Remove the console lower box (see page 20-95).
3. Disconnect the 28P connector (A) from the HandsFreeLink control unit (B).
4. Inspect the connector and socket terminals for a good pinfit 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.
 IftheterminalslookOK,gotostep5.
5. Reconnect the connector and make these input tests at the connector.  If any test indicates a problem, find and correct the cause, then recheck the system.
 If all the input tests prove OK, go to step 6.






1 BLK Under all conditions Check for voltage to ground:
There should be less than 0.5 V.Poor ground (G501)
An open in the wire
15 WHT Under all conditions Check for voltage to ground: There should be battery voltage.Blown No. 23 (10 A) fuse in the
under-hood fuse/relay box
An open in the wire
16 PUR Ignition switch ON (II) Check for voltage to ground: There should be battery voltage.Blown No. 35 (7.5 A) fuse in the
under-dash fuse/relay box
An open in the wire
6. Disconnect the 28P connector again, and make this input test at the connector.  If the test indicates a problem, find and correct the cause, then recheck the system.
 If the input test proves OK, the HandsFreeLink control unit must be faulty, replace it.
18 PNK Under all conditions Check for continuity between No. 18 terminal and the driver’s under-dash
fuse/relay box connector Q (16P)
terminal No. 6:
There should be continuity.An open in the wire
Driver’s under-dash fuse/relay
box connector Q (16P)
disconnected Check for continuity to ground:
There should be no continuity.
Short to ground
Wire side of female terminals
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General PrecautionsSteering-related Precautions
Cable Reel Alignment
24-13
Precautions and Procedures
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).
Please read the following precautions carefully before
servicing the airbag system. If the instructions
described in this manual are not properly followed, or
the airbags could accidentally deploy and cause
damage or injuries. Except when doing electrical inspections, always turn the ignition switch to LOCK (0), disconnect the
negative cable from the battery, then wait at least
3 minutes before starting work.
NOTE: The SRS memory is not cleared even if the
ignition switch is turned to LOCK (0), or the battery
cables are disconnected from the battery.
 Use replacement parts which are manufactured to the same standards and quality as the original parts. Do
not install used SRS parts. Use only new parts when
making SRS repairs.
 Carefully inspect any SRS part before you install it. Do not install any part that shows signs of being
dropped or improperly handled, such as dents, cracks
or deformation.
 Before disconnecting the SRS unit connectors, always disconnect the appropriate SRS parts
connectors.  Use only a digital multimeter to check the system. If it
is not a Honda multimeter, make sure its output is
10 mA (0.01 A) or less when switched to the lowest
value in the ohmmeter range. A tester with a higher
output could cause accidental deployment and
possible injury.
 Do not put objects on the front passenger’s airbag.
 The original audio and navigation system have a coded theft protection circuit. Make sure you have the
anti-theft codes for the audio system or navigation
system (if equipped), then write down the audio
presets before disconnecting the negative cable from
the battery.
 Before returning the vehicle to the client, enter the anti-theft codes for the audio system or navigation
system (if equipped), then enter the audio presets; set
the clock.
 Misalignment of the cable reel could cause an open in the wiring, making the SRS system, remote steering
wheel controls, or the horn inoperative. Center the
cable reel whenever you do the following (see step 6
on page 24-202).
– Installation of the steering wheel
– Installation of the cable reel
– Installation of the steering column
– Other steering-related adjustment or installation
 Do not disassemble the cable reel.
 Do not apply grease to the cable reel.
 If the cable reel shows any signs of damage, replace it with a new one. For example, if the cable reel does
not rotate smoothly, replace it.
(cont’d)
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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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Clear the DTC Memory With the HDS
24-23
A
5. Use the HDS to check for DTCs.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.
6. Read and record the DTC.
7. Turn the ignition switch to LOCK (0), and wait for 10 seconds.
8. Disconnect the HDS from the DLC.
9. Do the troubleshooting procedure for the DTC. NOTE: Make sure the battery is fully charged before
you begin.
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).
5. In the SRS MENU of the HDS, select SRS, then DTC to clear DTCs.
6. Turn the ignition switch to LOCK (0), and wait for 10 seconds.
7. Disconnect the HDS from the DLC.
(cont’d)
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Clear the DTC Memory Using MES
Connector Without the HDSTroubleshooting Intermittent Failures
Special Tools Required
24-24SRS
General Troubleshooting Information (cont’d)
B
A
07PAZ-001010A
SCS Service Connector 07PAZ-001010A
NOTE: Make sure the battery is fully charged before
you begin.
To clear the DTCs from the SRS unit, use the HDS or the
following procedure. 1. Make sure the ignition switch is in LOCK (0).
2. Connect the SCS service connector (A) to the yellow MES 2P connector (B). Do not use a jumper
wire.
3. Turn the ignition switch to ON (II).
4. The SRS indicator will come on for about 6 seconds, and then go off. Remove the SCS service connector
from the MES connector (2P) within 4 seconds after
the indicator goes off.
5. The SRS indicator will come on again. Reconnect the SCS service connector to the MES connector
(2P) within 4 seconds after the indicator comes on.
6. When the SRS indicator goes off, remove the SCS service connector from the MES connector (2P)
within 4 seconds.
7. The SRS indicator blinks two times, indicating that the memory has been cleared.
8. Turn the ignition switch to LOCK (0).
9. Turn the ignition switch to ON (II) again. If the SRS indicator comes on for 6 seconds, and then goes off,
the system is OK. If the indicator stays on,
troubleshoot the DTC, refer to symptom
troubleshooting. If there was a malfunction, but it does not recur, it will
be stored in the memory as an intermittent failure, and
the SRS indicator may come on depending on this
malfunction detected.
NOTE:
 Check the condition of the battery (see page 22-67) and the charging system (see page 4-23). Low battery
voltage may cause some intermittent failures.
 A faulty or damaged cable reel can cause intermittent problems related to the driver’s airbag inflator DTCs.
After checking the DTC, troubleshoot as follows: 1. Make sure the ignition switch is in LOCK (0).
2. Connect the HDS to the data link connector (DLC).
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).
5. In the SRS MENU on the HDS, select SRS, then DTC to clear DTCs.
6. Read the DTC (see ‘‘Reading the DTC’’).
7. Clear the DTC memory(see ‘‘Clear the DTC’’).
8. Set the parking brake, then start the engine, and let it idle.
9. The SRS indicator comes on for about 6 seconds and then goes off.
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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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