Acura CSX. Manual — part 667
*03
SNR9ANGK734000Y1776FAAT00
+
−
−
−
−
YES
NO
YES
NO
DTC B1776:
23-377
23-377
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 HandsFreeLink
control 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 HandsFreeLink control unit 28P
connector.
6. Disconnect the HFL-navigation microphone 3P
connector.
Microphone Input/Output Short
to Ground/Open
Wire side of female terminals
Is ther e voltage?
Is DT C B17 7 6 indicated?
08/08/21 14:18:40 61SNR030_230_0380
*01
*02
*03
+
−
+
−
−
−
−
−
−
−
−
YES
NO
YES
NO
YES
NO
23-378
HandsFreeLink System
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 and
HandsFreeLink 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 ther e continuity?
Is ther e continuity?
Is ther e continuity?
08/08/21 14:18:41 61SNR030_230_0381
*01
SNR9ANGK734000Y1779FAAT00
−
−
−
−
−
−
DTC B1779:
YES
NO
YES
NO
YES
NO
23-379
HFL-VOICE CONTROL SWITCH 5P CONNECTOR
HFL 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 HandsFreeLink 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.
Wire side of female terminals
Wire side of female terminals
Is DT C B17 7 9 indicated?
Is the switch OK ?
Is ther e continuity?
08/08/21 14:18:41 61SNR030_230_0382
*02
*03
−
−
−
−
YES
NO
YES
NO
23-380
HandsFreeLink System
HANDSFREELINK CONTROL UNIT 28P CONNECTOR
HFL STRG SW (BLU)
HFL-VOICE CONTROL SWITCH 5P CONNECTOR
REMOTE 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 terminals
Wire side of female terminals
Is ther e voltage?
Is ther e continuity?
08/08/21 14:18:41 61SNR030_230_0383
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