Test R: Voice Recognition Is Inoperative/Does Not Operate Correctly - Vehicles Without The SYNC System

PINPOINT TEST R: VOICE RECOGNITION IS INOPERATIVE/DOES NOT OPERATE CORRECTLY - VEHICLES WITHOUT THE SYNC SYSTEM

Normal Operation
When the VOICE switch is pressed, it changes the reference voltage from the audio control module (ACM) on circuit VMN54 (BU/OG), and the ACM enters voice recognition mode. A microphone located in the interior rear view mirror receives the voice command and sends a signal to the ACM through circuits VMM13 (YE/GN) and RMM13 (BU). Power to the interior rear view mirror is provided through circuit CBP41 (BU). Ground is provided through circuit GD133 (BK).

- DTC B2633 (Driver-Front Microphone Circuit Failure) - set by the ACM during the microphone test when the ACM does not receive an adequate signal from the microphone when the test tone is sounded.

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Steering wheel controls
- Microphone (part of the interior rear view mirror)
- ACM

R1-R3:

R3-R5:

R5-R7: