Pinpoint Test AA: Voice Recognition Is Inoperative/Does Not Operate Correctly
Information and Entertainment System
Pinpoint Test AA: Voice Recognition Is Inoperative/Does Not Operate Correctly
Refer to Wiring Diagram Set 130, Audio System/Navigation for schematic and connector information Electrical Diagrams.
Normal Operation
When the VOICE switch is pressed, it changes a reference voltage signal, and the audio system enters voice recognition mode. If the vehicle is equipped with navigation, the VOICE switch is wired to the Audio Front Control Module (ACM). If the vehicle is not equipped with navigation, the VOICE switch is wired to the Accessory Protocol Interface Module (APIM). A microphone located in the headliner receives the voice command and sends a signal to the APIM (Accessory Protocol Interface Module). The microphone is also used to detect outgoing audio during a phone call.
If the vehicle is equipped with navigation, the APIM (Accessory Protocol Interface Module) receives the microphone input and also broadcasts it to the ACM (Audio Front Control Module). The first voice commands spoken determine which system handles the voice commands.
The microphone test (vehicles with navigation only) is available through the Integrated Diagnostic System (IDS) scan tool or through the ACM (Audio Front Control Module) self-diagnostic mode. Running this test causes the ACM (Audio Front Control Module) to produce a test tone. If the system is operating correctly, the microphone detects the tone and produces a signal to the ACM (Audio Front Control Module) indicating the tone was heard.
- DTC B1D79:01 (Microphone Input: General Electrical Failure)- set by the APIM (Accessory Protocol Interface Module) during the on-demand self-test if it does not detect the microphone.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Microphone (part of the auto-dimming interior mirror)
- Steering wheel controls
- ACM (Audio Front Control Module) (if equipped with navigation)
- APIM (Accessory Protocol Interface Module)
PINPOINT TEST AA : VOICE RECOGNITION IS INOPERATIVE/DOES NOT OPERATE CORRECTLY
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
AA1 CHECK THE OPERATION OF THE STEERING WHEEL CONTROLS
- Operate the audio system in radio tuner (AM/FM) mode.
- Press the VOICE switch on the steering wheel controls.
Does the audio system enter voice recognition mode?
Yes
GO to AA2.
No
GO to Pinpoint Test U to diagnose the steering wheel controls system. Pinpoint Test U: The Steering Wheel Controls Are Inoperative/Do Not Operate Correctly
AA2 CHECK THE OPERATION OF THE VOICE RECOGNITION
- Press the VOICE switch on the steering wheel controls.
- Wait for the audio system to acknowledge the VOICE switch being pressed.
- While still in voice recognition mode, speak the command "PHONE", and observe the audio system.
Does the audio system acknowledge the command "PHONE"?
Yes
If the vehicle is equipped with navigation, GO to AA3.
Otherwise, the system is operating correctly at this time. ADVISE the customer on the correct operation of the voice recognition system.
No
GO to AA6.
AA3 CHECK THE MICROPHONE SIGNAL TO THE ACM (Audio Front Control Module)
- Operate the audio system in radio tuner (AM/FM) mode.
- Disconnect: ACM (Audio Front Control Module) C240C.
NOTE: ACM (Audio Front Control Module) C240C must be disconnected after the ACM (Audio Front Control Module) is powered on or the ACM (Audio Front Control Module) will not receive the RUN message over the network.
- Press the VOICE switch on the steering wheel controls.
- While speaking a command, measure the AC voltage between the ACM (Audio Front Control Module) C240C-11, circuit VMN01 (BU/BN), harness side and the ACM (Audio Front Control Module) C240C-12, circuit RMN01 (GN), harness side.
Is a fluctuating AC voltage present?
Yes
GO to AA12.
No
GO to AA4.
AA4 CHECK THE MICROPHONE CIRCUITS TO THE ACM (Audio Front Control Module) FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: APIM (Accessory Protocol Interface Module) C3342.
- Ignition ON.
- Measure the voltage between the ACM (Audio Front Control Module) C240C-11, circuit VMN01 (BU/BN), harness side and ground; and between the ACM (Audio Front Control Module) C240C-12, circuit RMN01 (GN), harness side and ground.
Is any voltage present?
Yes
REPAIR the circuit in question. TEST the system for normal operation.
No
GO to AA5.
AA5 CHECK THE MICROPHONE CIRCUITS TO THE ACM (Audio Front Control Module) FOR AN OPEN OR SHORT TO GROUND
- Ignition OFF.
- Measure the resistance between the ACM (Audio Front Control Module) C240C-11, circuit VMN01 (BU/BN), harness side and the APIM (Accessory Protocol Interface Module) C3342-12, circuit VMN01 (BU/BN), harness side; and between the ACM (Audio Front Control Module) C240C-11, circuit VMN01 (BU/BN), harness side and ground.
- Measure the resistance between the ACM (Audio Front Control Module) C240C-12, circuit RMN01 (GN), harness side and the APIM (Accessory Protocol Interface Module) C3342-13, circuit RMN01 (GN), harness side; and between the ACM (Audio Front Control Module) C240C-12, circuit RMN01 (GN), harness side and ground.
Is the resistance less than 5 ohms between the ACM (Audio Front Control Module) and the APIM (Accessory Protocol Interface Module), and greater than 10,000 ohms between the ACM (Audio Front Control Module) and ground?
Yes
GO to AA11.
No
REPAIR the circuit in question. TEST the system for normal operation.
AA6 CHECK THE MICROPHONE CIRCUITS FOR AN OPEN
- Ignition OFF.
- Disconnect: Microphone C9221.
- Disconnect: APIM (Accessory Protocol Interface Module) C3342.
- Measure the resistance between the microphone, harness side and the APIM (Accessory Protocol Interface Module), harness side as follows:
Positive Meter Lead Negative Meter Lead Circuit C9221-1 C3342-18 VMM23 (BN/VT) C9221-2 C3342-5 VMN07 (GY)
Are the resistances less than 5 ohms?
Yes
GO to AA7.
No
REPAIR the circuit in question. TEST the system for normal operation.
AA7 CHECK THE MICROPHONE CIRCUITS FOR A SHORT TO GROUND
- Measure the resistance between the microphone C9221-1, circuit VMM23 (BN/VT), harness side and ground; and between the microphone C9221-2, circuit VMN07 (GY), harness side and ground.
Are the resistances greater than 10,000 ohms?
Yes
GO to AA8.
No
REPAIR the circuit in question. TEST the system for normal operation.
AA8 CHECK THE MICROPHONE CIRCUITS FOR A SHORT TO VOLTAGE
- Ignition ON.
- Measure the voltage between the microphone, harness side and ground as follows:
Positive Meter Lead Negative Meter Lead Circuit C9221-1 Ground VMM23 (BN/VT) C9221-2 Ground VMN07 (GY) C9221-3 Ground DMN07
Is any voltage present?
Yes
REPAIR the circuit in question. TEST the system for normal operation.
No
GO to AA9.
AA9 CHECK THE MICROPHONE CIRCUITS FOR A SHORT TOGETHER
- Measure the resistance between the microphone, harness side as follows:
Positive Meter Lead Circuit Negative Meter Lead Circuit C9221-1 VMM23 (BN/VT) C9221-2 VMN07 (GY) C9221-1 VMM23 (BN/VT) C9221-3 DMN07 C9221-2 VMN07 (GY) C9221-3 DMN07
Are the resistances greater than 10,000 ohms?
Yes
GO to AA10.
No
REPAIR the circuits in question. TEST the system for normal operation.
AA10 ISOLATE THE MICROPHONE
- Ignition OFF.
- Install a new microphone. Refer to Microphone .
- Operate the audio system in radio tuner (AM/FM) mode.
- Press the VOICE switch on the steering wheel controls and attempt several voice commands.
Does the voice recognition operate correctly?
Yes
The fault was caused by an inoperative microphone. The system is now operating correctly.
No
GO to AA11.
AA11 CHECK FOR CORRECT APIM (Accessory Protocol Interface Module) OPERATION
- Connect: All Disconnected Connectors.
- Disconnect the APIM (Accessory Protocol Interface Module) connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the APIM (Accessory Protocol Interface Module) connector and make sure it seats correctly.
- Wait 2 minutes for the APIM (Accessory Protocol Interface Module) to re-initialize.
Is the concern still present?
Yes
INSTALL a new APIM (Accessory Protocol Interface Module). REFER to Accessory Protocol Interface Module (APIM) . TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
AA12 CHECK FOR CORRECT ACM (Audio Front Control Module) OPERATION
- Disconnect all the ACM (Audio Front Control Module) connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the ACM (Audio Front Control Module) connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
Is the concern still present?
Yes
INSTALL a new ACM (Audio Front Control Module). REFER to Audio Control Module (ACM) . TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.