Diagnostic Test: Mic Level

WARNING: This page is about a different car, the 2011 Honda Pilot, 2010 Honda Pilot, and 2009 Honda Pilot. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Check the vehicle battery condition first.
Check any official Honda service website for more service information about the navigation system.
Check for any CAN DTCs and repair them first.
Make sure that the correct navigation DVD color and version are installed.
Before assuming that a voice complaint is hardware related, ensure that the voice control system is being operated correctly.
- Make sure you are on the correct screen when trying to issue a voice command. For instance, the command Find the nearest Italian Restaurant only works on Map screen. (See the Navigation System manual for a complete list of allowed voice commands for the information being displayed).
- Close the windows and sunroof.
- Set the fan speed to low (1 or 2).
- Adjust the air flow from the air conditioning vents so that they do not blow against the microphone on the ceiling.
- Pause after pressing the navigation TALK button then give a voice command clearly in a natural speaking voice.
  If the system cannot recognize your command, speak louder.
- If the microphone picks up voices other than yours, the system may not interpret your voice commands correctly.
- If you speak a command with something in your mouth, or your voice is too husky, the system may misunderstand your command.
Check the connectors for poor connections or loose terminals.
Check for a loose roof console microphone; if it's loose, tighten it.
Before troubleshooting, make sure you have the anti-theft codes for the audio system and navigation system (if equipped).
After troubleshooting, enter the anti-theft codes for the audio system.
Determine if the problem only happens to one person, or everyone who uses the system.
If the system only has a problem with one person's voice, this should be considered a system limitation.

Turn the ignition switch to ON (II).
Measure the voltage between body ground and HFL-navigation-ANC microphone 7P connector terminals No. 6 and No. 7 individually.

Fig 1: Checking Voltage Between Body Ground & HFL-Navigation-ANC Microphone 7P Connector Terminals No. 6 & No. 7
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES - '09 model: Go to step 3.'10-11 models: Go to step 4.

NO - If the +B wire does not have voltage, repair open in the wire between the under-hood fuse/relay box and the HFL-navigation-ANC microphone 7P connector. If the ACC wire does not have voltage, repair open in the wire between the under-dash fuse/relay box and the HFL-navigation-ANC microphone 7P connector.
Measure the voltage between HFL-navigation-ANC microphone 7P connector terminal No. 1 and body ground.

Fig 2: Checking Voltage Between HFL-Navigation-ANC Microphone 7P Connector Terminal No. 1 & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there 0.2 V or less?

YES - Go to step 12.

NO - Repair an open in the wire between the HFL-navigation-ANC microphone and body ground (G701).
Turn the ignition switch to LOCK (0).
Disconnect the front HFL-navigation-ANC microphone 7P connector.
Check for continuity between front HFL-navigation-ANC microphone 7P connector terminal No. 2 and body ground.

Fig 3: Check for continuity between front HFL-navigation-ANC microphone 7P connector terminal No. 2 and body ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Go to step 12.

NO - Go to step 7.
Check for continuity between HandsFreeLink control unit 28P connector terminal No. 14 and body ground.

Fig 4: Check For Continuity Between Handsfreelink Control Unit 28P Connector Terminal No. 14 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - There is an open in the wire between the front HFL-navigation-ANC microphone and the HandsFreeLink control unit. Replace the affected shielded harness.

NO - Go to step 8.
Disconnect the HandsFreeLink control unit 28P connector.
Check for continuity between HandsFreeLink control unit 28P connector terminal No. 28 and body ground.

Fig 5: Check For Continuity Between Handsfreelink Control Unit 28P Connector Terminal No. 28 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Replace the CONTROL UNIT INPUT TEST/REPLACEMENT .

NO - Go to step 10.
Check for continuity between navigation unit connector C (16P) terminal No. 16 and body ground.

Fig 6: Check For Continuity Between Navigation Unit Connector C (16P) Terminal No. 16 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - There is an open in the wire between the navigation unit and the HandsFreeLink control unit. Replace the affected shielded harness.

NO - Go to step 11.
Check for continuity between navigation unit connector A (8P) terminal No. 4 and body ground.

Fig 7: Check for continuity between navigation unit connector A (8P) terminal No. 4 and body ground.
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Replace the Navigation Unit Removal/Installation

NO - Repair an open in the wire between navigation unit connector A (8P) terminal No. 4 and body ground (G503)FLOOR WIRE HARNESS (LEFT BRANCH) .
Go into the Self-Diagnosis Mode select Mic Icon Menu, and use the Mic Level test under Functional Setup (see HFL ) to check the operation of the navigation Talk and Back buttons.
Are the navigation TALK and BACK buttons operational?

YES - Go to step 13.

NO - Check for an open or short to body ground on navigation unit connector C (16P) terminal No. 12.
Use the Mic Level diagnostic under Functional Setup (see HFL ) to check the operation of the microphone.
Is the microphone operational?

YES - Check the operation of the voice control system (see the Navigation System Manual).

NO - Go to step 14.
Disconnect the HandsFreeLink control unit 28P connector.
Disconnect navigation unit connector C (16P).
Check for continuity between navigation unit connector C (16P) terminals No. 8 and No. 16 individually.

Fig 8: Checking Continuity Between Navigation Unit Connector C (16P) Terminals No. 8 & No. 16
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - There is a short to body ground in the wire(s) between the navigation unit and the HandsFreeLink control unit. Replace the affected shielded harness.

NO - Go to step 17.
Check for continuity between navigation unit connector C (16P) terminals No. 8 and No. 16.

Fig 9: Check For Continuity Between Navigation Unit Connector C (16P) Terminals No. 8 And No. 16
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - There is a short in the wires between the navigation unit and the HandsFreeLink control unit. Replace the affected shielded harness.

NO - Go to step 18.
Check for continuity between navigation unit connector C (16P) terminals No. 8 and No 15 and terminals No. 15 and No. 16 individually.

Fig 10: Checking Continuity Between Navigation Unit Connector C (16P) Terminals No. 8, No. 16 & No. 15
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - There is a short in the wires between the navigation unit and the HandsFreeLink control unit. Replace the affected shielded harness.

NO - Substitute known-good components in this order until the problem goes away:
- HFL-navigation-ANC microphone (see HFL-NAVIGATION-ANC MICROPHONE REMOVAL/INSTALLATION )
- HandsFreeLink control unit (see HANDSFREELINK CONTROL UNIT REMOVAL/INSTALLATION )
- Navigation unit (see NAVIGATION UNIT REMOVAL/INSTALLATION )