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DVD read error messages Navigation cannot control HVAC by voice
command
Diagnostic Test: Car Status
YES
NO YES
NO
23-34623-346Navigation System
Symptom Troubleshooting (cont’d)
NOTE:
Check the vehicle battery condition first.
Confirm the correct DVD color and version is installed in the navigation unit (see page 23-270).
Refer to General Troubleshooting for a list of common DVD screen error messages and the
probable causes (see page 23-319).
Check any official Honda service website for more service information about the navigation system.
Go into the Diagnostic mode and use the ECU Info diagnostic (see page 23-305) to check the status of the
DVD cover.
Inspect the navigation DVD for scratches or damage.
The following troubleshooting is for the error message shown on the error messages table
(see page 23-319).
1. Check the DVD-ROM reading surface for scratches and finger prints.
Clean or replace the DVD-ROM (see page
23-270).
If the problem occurs occasionally when the
system is cold, this is normal. If the problem occurs
frequently when driving, replace the navigation
unit (see page 23-355). NOTE:
Check the vehicle battery condition first.
Check the connectors for poor connections or loose terminals.
Check for and resolve all CAN DTCs before troubleshooting the navigation system.
If the Hard Error Code stored, check the Hard Error Code troubleshooting first.
Before troubleshooting, make sure the anti-theft codes for the navigation system.
After troubleshooting, enter the anti-theft codes for 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 any official Honda service website for more service information about the navigation system.
1. Connect the HDS to the DLC. Check for B-CAN or F-CAN DTCs in the data list.
Troubleshoot and repair all CAN related
DTCs, and then retest.
Go to step 2.
Ar e t her e any scr at ches or f i nger pr i nt s on t heDV D-ROM r ead ing sur f ace? Ar e t her e any DT Cs i n t he B-CAN or F -CANsy st ems?
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Page 2633 of 2893

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YES
NO
YES
NO
System always comes up in in-line
diagnostic mode
23-34723-347
In Line Diag
123
456
789
0
Navi ECU
Display XXXXCorrect PIN
GPS Antenna
RR Camera RadioXM
HFL
A/C
Exit Diag
Start Diag
BACK
Delete Done
KA
2. Turn the ignition switch to ON (II).
3. Select the Self-Diagnosis mode.
4. Check for error code in the Error History.
Refer to the Hard Error Code
troubleshooting.
Go to step 5.
5. Substitute a known-good climate control unit. Reconnect all connectors, and retest.
Replace the original climate control unit
(see page 21-75).
Replace the navigation unit (see page 23-355). 1. When a navigation unit is powered up for the first
time at the factory, the factory diagnosis screen (In
Line Diag) appears. Normally the factory performs
the steps necessary to verify proper operation, and
terminate the factory diagnostic. Until the proper
confirmation sequence is performed, the screen
will appear every time the vehicle is started.
2. Follow the steps to prevent the screen from showingupinthefuture:
Hold down the buttons (Menu, Map/Guide, and Cancel) for about 5 seconds. The Select
Diagnosis Items screen appears.
Hold down the Map/Guide button for 5 10 seconds. A screen with a Complete button,
appears.
Touch Complete, and then the Return button (the system may re-boot).
Restart the vehicle, and confirm normal operation by completing the PDI of the
navigation system Service Bulletin.
Are there any Hard Error Code stored?
Does t he sy mpt om go aw ay ?
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Page 2658 of 2893
(#'#
) HandsFreeLink Control UnitDTC Description DTC typePage
23-370HandsFreeLink System
DTC Troubleshooting Index
B1750 Communication bus line error (Bus-off)
Loss of
communication (see page 22-107)
B1775 Micr ophone input/output short to power/open Signal error(see page 23-376)
B1776 Microphone input/output short to ground/open Signal error(see page 23-377)
B1779 HFL switch (HFL TALK/HFL BACK buttons) circuit open/ short Signal error
(see page 23-379)
B1780 HFL switch (HFL TALK/HFL BACK buttons) circuit short Signal error (see page 23-381)
B1792 HandsFreeLink control unit internal error Internal error (see page 23-382)
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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?
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Page 2671 of 2893

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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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Page 2696 of 2893

Wiring Precautions
Precautions for Electrical Inspections
24-16SRS
Precautions and Procedures (cont’d)
Some of the SRS wiring can be identified by a special
yellow outer covering, and the SRS connectors can be
identified by their yellow color. Observe the following
instructions:
Never attempt to modify, splice, or repair SRS wiring. If there is an open or damage to the SRS wiring,
replace the harness.
Be sure to install the harness wires so they do not get pinched or interfere with other parts.
Make sure all SRS ground locations are clean, and grounds are securely fastened for optimum metal-to-
metal contact. Poor grounds can cause intermittent
problems that are difficult to diagnose.
Do not use any silicone based cleaners or lubricants on any SRS connectors or terminals. When using electrical test equipment, insert the
probe of the tester into the wire side of the connector.
Do not insert the probe of the tester into the terminal
side of the connector, and do not tamper with the
connector.
Use backprobe adapter 07TAZ-001020A. Do not insert the probe forcibly.
Use specified service connectors in troubleshooting. Using improper tools could cause a diagnostic error
due to poor metal-to-metal contact.
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