ACURA CSX 2006 Service Repair Manual

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23-373
HFL System Troubleshooting
NOTE:
 You must be able to duplicate the client’s concern to successfully diagnose the problem.
 Always use the client’s phone.
 Make sure the phone is approved and configured correctly. Online, go to www.acura.com/handsfreelink, or call the HFL support desk at 888-528-7876.
1. Connect the HDS to the DLC.
2. Turn the ignition switch to ON (II).
3. Check for DTCs.
Repair the indicated DTCs and recheck.
Go to step 4.
4. Try to duplicate the problem.
Go to step 5.
The system is OK at this time.
5. Pair the phone to a known-good vehicle (same model, year, and trim), and tryduplicate the problem.
Call the HFL support desk at 888-528-7876 to make sure the phone is configured correctly and has the
correct software. If the phone is configured correctly, it is either a characteristic of the HFL system, or a
characteristic of the particular approved phone being used. Explain to your client that this is a system
characteristic. Another phone from the approved phone list may give more favorable results.
Substitute a known-good HandsFr eeLink control unit and recheck. If the problem goes away, replace the
original HandsFreeLink control unit.
Are any DTCs indicated?
Can y ou d upl i cat e t he pr obl em?Does t he phone hav e t he same pr obl em on t he k now n-good v ehi cl e?
08/08/21 14:18:39 61SNR030_230_0376
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23-374HandsFreeLink System
Circuit Diagram
UNDER-HOOD FUSE/RELAY BOX
Q1E5
WHT 15 16
ORN
RED
WHT
ACC
BAT
IGNITION SWITCH
No. 23 (10 A)
No. 2 (IG) (50 A)
BATTERY
No. 1 (BAT) (100 A)
BRN
BRN
2
GRN 3
BLK
G501 1
CABLE REEL
H1
D4
G2
B ACC
MICU
13 HFL-VOICE CONTROL SWITCH4
LIGHTS
(LEDx4)
5 PUR
UNDER-DASH FUSE/RELAY BOX
No. 35 (7.5 A)
GND 20BLUETOOTH
TRANSCEIVER
1k
HANDSFREELINK CONTROL UNIT
VOICE
CONTROL
SWITCH
HFL
BACK HFL
TALK
47 180 A
C2
No. 4 (10 A) FUSE
(In the under-hood
fuse/relay box) ORN/WHT 10
20
HFL
STRG
SW
DASH LIGHTS
BRIGHTNESS
CONTROLLER RED BRN
BRN
1
2
11
12
RED/BLK
08/08/21 14:18:39 61SNR030_230_0377
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23-375
3
27
HANDSFREELINK CONTROL UNIT
MIC
SIG
MIC
SIG HFL
MUTE
BRN
YEL
HFL-NAVIGATION
MICROPHONE HFL
ICON
TELEM
SIG TELEM
SIG
12 13 14
D8 D7 D9 B8 B20 B21 B9
GRY
MIC
SIG MIC
SIG HFL
MUTEHFL
ICONTELEM
SIG TELEM
SIG
GRN RED LT BLU LT GRN BLU PNK
GRY
MIC
SH
GRY
B-CAN
18
PNK
PNK
LT BLU
MICU PNK
Q6
DATA LINK
CONNECTOR
(DLC)
GAUGE CONTROL
MODULE (TACH)
CLIMATE CONTROL
UNIT
28
191125 26
Q8
UNDER-DASH FUSE/RELAY BOX
AUDIO
REMOTE
GND
A5
BRN
A 7B24
B12B10
GRY
RED WHT
6
20 HFL/NAVI
COMM2
B23
BLK GRN
21B11
GRY8
HFL/NAVI
COMM1
HFL/NAVI
COMM3HFL/NAVI
COMM4HFL/NAVI
COMM SH
HFL/NAVI
COMM2
HFL/NAVI
COMM1 HFL/NAVI
COMM3
HFL/NAVI
COMM4HFL/NAVI
COMM SH MIC
SIG SH
TELEM
SIG SH
MIC MIC
NAVIGATION UNIT
12


ORN
MOONROOF
SWITCH
3 *: The shielded wires have a heat-shrunk tube
insulating the outside of the wire. The color
of the insulating tube, typically black or dark gray,
may not match the color of the wire listed on the
schematic.
: CAN line
: Shielding
*
*
*
*
*
08/08/21 14:18:40 61SNR030_230_0378
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DTC B1775:
YES
NO
YES
NO
YES
NO
23-376HandsFreeLink System
DTC Troubleshooting
HANDSFREELINK CONTROL UNIT 28P CONNECTOR
MIC (YEL)
HANDSFREELINK CONTROL UNIT 28P CONNECTOR MIC (YEL)
HFL-NAVIGATION MICROPHONE 3P CONNECTOR MIC (YEL)
Microphone Input/Output Short
to Power/Open
1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0), then turn it to
ON (II).
3. Check for DTCs with the HDS.
Go to step 4.
Intermittent failure, the system is OK at this
time.
4. Turn the ignition switch to LOCK (0).
5. Disconnect the HandsFr eeLink control unit 28P
connector.
6. Disconnect the HFL-navigation microphone 3P connector.
7. Turn the ignition switch to ON (II). 8. Measure the voltage between HandsFreeLink
control unit 28P connector terminal No. 13 and
body ground.
Short to power in the wire between the
HandsFreeLink control unit and the HFL-navigation
microphone. Replace the affected shielded
harness.
Go to step 9.
9. Turn the ignition switch to LOCK (0).
10. Check for continuity between HandsFreeLink control unit 28P connector terminal No. 13 and the
HFL-navigation microphone 3P connector terminal
No. 1.
Go to step 11.
Open in the wire between the HandsFreeLink
control unit and the HFL-navigation microphone.
Replace the affected shielded harness.
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Is DTC B1775 indicated? Is there voltage?
Is there continuity?
08/08/21 14:18:40 61SNR030_230_0379
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DTC B1776:
23-37723-377
HANDSFREELINK CONTROL UNIT 28P CONNECTOR
MIC SIG (GRN)
11. Disconnect navigation unit connector D (12P).
12. Turn the ignition switch to ON (II).
13. Measure the voltage between HandsFreeLinkcontrol unit 28P connector terminal No. 27 and
body ground.
Short to power in the wire between the
HandsFreeLink control unit and the navigation unit.
Replace the affected shielded harness.
Substitute a known-good microphone
(see page 23-358), then recheck. If the symptom
goes away, replace the original HFL-navigation
microphone. 1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0), then turn it to
ON (II).
3. Check for DTCs with the HDS.
Go to step 4.
Intermittent failure, the system is OK at this
time.
4. Turn the ignition switch to LOCK (0).
5. Disconnect the HandsFr eeLink control unit 28P
connector.
6. Disconnect the HFL-navigation microphone 3P connector.
(cont’d)Microphone Input/Output Short
to Ground/Open
Wire side of female terminals
Is there voltage? Is DTC B1776 indicated?
08/08/21 14:18:40 61SNR030_230_0380
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23-378HandsFreeLink System
DTC Troubleshooting (cont’d)
HANDSFREELINK CONTROL UNIT 28P CONNECTOR
MIC (YEL)MIC
(BRN)
HANDSFREELINK CONTROL UNIT 28P CONNECTOR MIC (YEL)MIC
(BRN) HANDSFREELINK CONTROL UNIT 28P CONNECTOR
MIC SIG (GRN)
7. Check for continuity between body ground andHandsFreeLink control unit 28P connector
terminals No. 13 and No. 14 individually.
Short to body ground in the wire(s) between
HandsFreeLink control unit and HFL-navigation
microphone. Replace the affected shielded
harness.
Go to step 8.
8. Check for continuity between HandsFreeLink control unit the 28P connector terminal No. 13 and
No. 14.
Short in the wire(s) between the
HandsFreeLink control unit and HFL-navigation
microphone. Replace the affected shielded
harness.
Go to step 9. 9. Disconnect navigation unit connector D (12P).
10. Check for continuity between HandsFreeLink control unit 28P connector terminal No. 27 and
body ground.
Short to body ground in the wire(s) between
the HandsFreeLink control unit and the navigation
unit. Replace the affected shielded harness.
Substitute a known-good navigation unit
(see page 23-355), then recheck. If the symptom
goes away, replace the original navigation unit
(see page 23-355).
Wire side of female terminals
Wire side of female terminals Wire side of female terminals
Is there continuity?
Is there continuity? Is there continuity?
08/08/21 14:18:41 61SNR030_230_0381
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DTC B1779:
YES
NO
YES
NO YES
NO
23-379
HFL-VOICE CONTROL SWITCH 5P CONNECTORHFL STRG SW (ORN/WHT)
HFL STRG SW (BLU)
HANDSFREELINK CONTROL UNIT 28P CONNECTOR
HFL Switch (HFL TALK/HFL BACK
Buttons) Circuit Open/Short
1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0), then start the
vehicle, and turn the steering wheel back and forth
several times.
3. Check for DTCs with the HDS.
Go to step 4.
Intermittent failure, the system is OK at this
time.
4. Turn the ignition switch to LOCK (0).
5. Do the HFL switch test (see page 23-387).
Go to step 6.
Replace the HFL-voice control switch
(see page 23-357).
6. Disconnect the HandsFr eeLink control unit 28P
connector.
7. Disconnect the HFL-voice control switch 5P connector. 8. Check for continuity between HandsFreeLink
control unit 28P connector terminal No. 2 and the
HFL-voice control switch 5P connector terminal
No. 3.
Go to step 9.
Repair open in the wire between the switch,
the cable reel, and the HandsFreeLink control unit.
(cont’d)
Wire side of female terminals
Wire side of female terminals
Is DTC B1779 indicated?
Is the switch OK ? Is there continuity?
08/08/21 14:18:41 61SNR030_230_0382
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NO
YES
NO
23-380HandsFreeLink System
DTC Troubleshooting (cont’d)
HANDSFREELINK CONTROL UNIT 28P CONNECTOR
HFL STRG SW (BLU)
HFL-VOICE CONTROL SWITCH 5P CONNECTORREMOTE GND (BRN)
NAVIGATION UNIT CONNECTOR A (24P)
REMOTE GND (BRN)
9. Turn the ignition switch to ON (II).
10. Measure the voltage between HandsFreeLink control unit 28P connector terminal No. 2 and body
ground.
Repair short to power in the wire between
the HandsFreeLink control unit and the HFL-voice
control switch.
Go to step 11. 11. Turn the ignition switch to LOCK (0).
12. Disconnect navigation unit connector A (24P).
13. Check for continuity between navigation unit
connector A (24P) terminal No. 5 and HFL-voice
control switch 5P connector terminal No. 4.
Replace the HandsFreeLink control unit.
Repair open in the wire between the switch,
the cable reel, and the navigation unit .
Wire side of female terminals
Wire side of female terminalsWire side of female terminals
Is there voltage?
Is there continuity?
08/08/21 14:18:41 61SNR030_230_0383
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DTC B1780:
YES
NO
YES
NO YES
NO
23-381
HANDSFREELINK CONTROL UNIT 28P CONNECTOR
HFL STRG SW (BLU)
HFL Switch (HFL TALK/HFL BACK
Buttons) Circuit Short
1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0), then start the
vehicle, and turn the steering wheel back and forth
several times.
3. Check for DTCs with the HDS.
Go to step 4.
Intermittent failure, the system is OK at this
time.
4. Turn the ignition switch to LOCK (0).
5. Do the HFL switch test (see page 23-387).
Go to step 6.
Replace the HFL-voice control switch
(see page 23-357).
6. Disconnect the HandsFr eeLink control unit 28P
connector.
7. Disconnect the HFL-voice control switch 5P connector. 8. Check for continuity between HandsFreeLink
control unit 28P connector terminal No. 2 and body
ground.
Repair short in the wire between the
HandsFreeLink control unit and the HFL-voice
control switch.
Replace the HandsFreeLink control unit
(see page 23-388).
Wire side of female terminals
Is DTC B1780 indicated?
Is the switch OK ? Is there continuity?
08/08/21 14:18:41 61SNR030_230_0384
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DTC B1792: The HFL system does not recognize all voice
prompts
YES
NO YES
NO
YES
NO
YES
NO
YES
NO
23-38223-382HandsFreeLink System
DTC Troubleshooting (cont’d) Symptom Troubleshooting
HandsFreeLink Control Unit
Internal Error
1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0), then turn it to
ON (II).
3. Check for DTCs with the HDS.
Replace the HandsFreeLink control unit.
Intermittent failure, the system is OK at this
time. 1. Connect the HDS to the DLC.
2. Clear the DTCs with the HDS.
3. Turn the ignition switch to LOCK (0), then turn it to
ON (II).
4. Check for DTCs.
Repair the indicated DTCs.
Go to step 5.
5. Check if the problem is duplicated.
Go to step 6.
The system is OK at this time. Ask the
customer to demonstrate the problem.
6. Check if the navigation system can recognize voice prompts.
Go to step 7.
Refer to the navigation system
troubleshooting (see page 23-342).
7. Pair the client’s phone to a known-good vehicle and try to duplicate the problem.
Call the HFL support desk at 888-528-7876,
and inquire if there are any known issues for the
problem. If there are no known issues, explain to
the client’s this is a system characteristic and
cannot be improved at this time.
Substitute a known-good HFL-navigation
microphone (see page 23- 358). If the problem is
still present, substitute a known-good
HandsFreeLink control unit (see page 23-388). If the
problem goes away, replace the original HFL-
navigation microphone.
Is DTC B1792 indicated?
Ar e t her e any DT Cs i nd i cat ed ?
Can the client’s problem be duplicated?
Can the voice prompts be recognized?Can y ou d upl i cat e t he pr obl em?
08/08/21 14:18:41 61SNR030_230_0385
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