When the system goes into the System
Diagnostic Menu, the screen in Figure A2
will display.

Volume knob
Figure A1

3. Select Confirmation/Adjustment.

Step
3

Figure A2

Scroll
arrow

4. Select Initialize Settings.
NOTE: Use the scroll arrow to find Initialize Settings.

Step
4

Figure A3
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Step
5

5. Select Accessory Number Initialization.

Figure A4

6. Select Yes.
Step
6

Figure A5

7. Select Yes.
Step
7

Figure A6

8. The screen in Figure A7 will display while initializing.

Figure A7

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9. The screen in Figure A8 will display when
initializing is complete.

Figure A8
10. Reboot the Multi AV system as follows:
a. Turn the ignition OFF.
b. Wait 10 Seconds.
c. Turn the ignition ON.

Part 3: Using C-III plus; reprogram (reconfigure) the Multi AV unit and confirm the control unit part
number has changed.

1. Select Re/programming Configuration.

Step
1

Figure B1

2. Check the box confirming the precautions have
been read then select Next.
Step
2

Figure B2
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Example

3. Use Manual Selection (Vehicle Name), then
select correct Make, Model and Year.
•

If the screen in Figure B3 does not display,
skip to step 5.

Step
3

4. Click on Select.

Step
4

Figure B3
Example
5. Confirm correct VIN, Vehicle Name and Model
Year.
Step
5

6a. If the VIN is correct, select Confirm.
6b. If the VIN needs to be changed,
Step
6a

a. Select Change then refer to Figure B5.
Figure B4

b. Correct the VIN, and then select Confirm.

Step
6b

Figure B5

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7. After system call completes, select MULTI
AV.

Step
7

Figure B6

8. Select Manual Configuration.
Step
8

Figure B7

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9. Use the drop down arrows to select the values for each item listed.
•

For MICROPHONE, select “DIRECTIONAL MIC”.

•

For all other items, use the values that you wrote down in Part 1, step 22 on page 9.

NOTE: If MICROPHONE is not one of the items:
•

GRADE will be listed in place of MICROPHONE.

•

For GRADE, select MODE 2. (GRADE MODE 2 = DIRECTIONAL MIC.)

10. Select Next.
Example

Step 9:
Select values

Step
10

Figure B8

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Example
11. Confirm correct values for items listed and
then select OK.

Step
13

12. Wait for C-III plus to transfer the
reprogramming (reconfiguration) to Multi AV
– about 1 minute or less.
13. After C-III plus finishes transferring the
reconfiguration to MULTI AV, select Home.

Step
11

Figure B9
14. Turn the ignition OFF and wait 10 seconds.
15. Start the engine and let it idle while the Multi AV system reboots.
16. Use C-III plus to clear any codes from the Multi AV system.
a. Select Diagnoses (One System) > Multi AV > Self Diagnosis Results.
b. Clear any codes that are present.

Step
17a

17. Confirm the Multi AV part number has
changed:
a. Select ECU Identification.

*****

b. Compare the part number you wrote
down in Part 1, step 11 on page 5 to the
one that is now displayed.

Step
17b

c. The part number should be different.
NOTE: If the part numbers are not
different, the reconfigure process was not
successful.

Figure B10

18. Close the C-III plus software and disconnect the VI from the vehicle.

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Part 4: Make sure the Multi AV system is operational.
1. Confirm that fan, temperature, and air flow modes can be adjusted.
2. Turn the radio ON.
3. Turn the volume knob and make sure the audio volume responds to movement of the knob.

Part 5: Replace the system microphone (for G37 Convertible)
a. Turn the ignition OFF.
b. Remove / snap loose (with a plastic trim tool) the
map lamp assembly.
c. Replace the microphone and the map lamp finisher
with the ones listed in the Parts Information.
d. Reinstall the map lamp assembly.
NOTE: If needed, see section AV in the
Service Manual for additional information.
e. Skip to Part 6 on page 22.
Figure M1

Part 5: Replace the system microphone (for all except G37 Convertible)
NOTE: The photos used in this section are of a M37/56. These photos are also representative (similar)
for all other applied vehicles except the G37 Convertible.
1. Turn the ignition OFF.

Roof console
assembly
2. Remove / snap loose the map lamp finisher
shown in Figure M2.
• Use a plastic trim tool as needed.
Map lamp finisher
Figure M2
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Microphone

3. Remove the microphone from the map lamp
finisher.

Map lamp
finisher
Figure M3
4. Fully open (slide back) the sunroof.

5. Carefully snap loose the headlining along the front of the sunroof opening at the 3 spots shown in
Figure M4.

Snap loose here

Figure M4

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Roof
console

6. Push the microphone through the roof
console so it is above the headlining.

Push microphone
above headlining
Figure M5

7. Remove both sun visor holders – twist ¼ turn to remove.

Sun visor holders

Figure M6

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8. Carefully pull the headlining down just enough to look in and locate the microphone connector.
CAUTION: Be careful not to crease the headlining.
Look in here for the
microphone connector

Figure M7
9. Carefully slide the connector to the right (towards the passenger side)
to disengage it from its mount.
• It may be tight on the mount, but it just slides to the right to disengage.
CAUTION: Be careful not to crease the headlining.

Slide connector to right

Microphone connector

Figure M8

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10. Carefully reach in above the headlining and pull out the microphone.
CAUTION: Be careful not to crease the headlining.

11. Disconnect the old microphone and discard.

Connector
Carefully reach in here and
pull out the microphone

Microphone

Figure M9

12. Install the new microphone in reverse order.
•

Make sure to use the new microphone listed in the Parts Information.

•

Make sure to use the new map lamp finisher listed in the Parts Information.

IMPORTANT: Make sure the microphone is firmly snapped into place. If the microphone is loose, it could
pick up extra noise from an unintended source.
CAUTION: Be careful not to crease the headlining.

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Part 6: Check Microphone Operation Using the vehicles on-board Systems Diagnostic Menu.
1. Turn ON the ignition and turn the audio system OFF.
Your vehicle may look different.
2. Put the AV system into System Diagnostic Mode:

SETTING

a. Press and hold the SETTING button.
b. While holding the SETTING button, turn the
volume control knob 40 clicks or more.
•

The volume control knob can be turned
either direction.

•

When the system goes into the System
Diagnostic Menu, the screen in
Figure M11 will display.

Volume knob
Figure M10

3. Select Confirmation/Adjustment.
Step
3

Figure M11

Scroll
arrow
4. Select Handsfree Phone.

Step
4

NOTE: Use the scroll arrow to find Handsfree
Phone.

Figure M12

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5. Select Voice Microphone Test.
Step
5

• A “feedback” noise will come from the
system speakers as confirmation of
microphone operation.
• If you speak, you should hear your voice
coming from the system speakers. This is
further confirmation of microphone
operation.
Figure M13
6. Reboot Multi AV system by cycling the ignition OFF for 10 seconds, then back ON.

7. Reset the customer’s radio stations presets.

The Service Procedure is complete, but you may need to adjust the system for customer preference:
Adjust outgoing call volume to a level that is suitable for the customer’s voice as follows:

A. Press the SETTING button on the control panel.

B. Select Volumes & Beeps.
Figure M14
C. Adjust the Outgoing Call volume to the
customer’s preference.
•
•
•
•
•

If extremely loud talker, set to level 1 ( - ).
If moderately loud talker, set to level 2.
If normal loud talker, set to level 3.
If moderately quiet talker, set to level 4.
If quiet talker, set to level 5 (+).
Figure M15

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