Pinpoint Test R: Voice Recognition Is Inoperative/Does Not Operate Correctly

Information and Entertainment System

Pinpoint Test R: 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 infotainment system enters voice recognition mode. 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.

- DTC B116A:01 (Handset Microphone: General Electrical Failure)-

This pinpoint test is intended to diagnose the following:

- Fuse

- Wiring, terminals or connectors

- Steering wheel controls

- Microphone

- APIM (Accessory Protocol Interface Module)

PINPOINT TEST R : 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.

NOTE: Failure to disconnect the battery when instructed results in false resistance readings.

R1 CHECK THE OPERATION OF THE STEERING WHEEL CONTROLS

- Operate the infotainment system in radio tuner (AM/FM) mode.

- Press the VOICE switch on the steering wheel controls.

Does the infotainment system enter voice recognition mode?

Yes
For vehicles with 4.2-inch (107 mm) screen SYNC(R), GO to R2.

For vehicles with 8-inch (203 mm) touchscreen SYNC(R), GO to R4.

No
GO to Pinpoint Test F to diagnose the steering wheel controls system Pinpoint Test F: The Steering Wheel Controls Are Inoperative/Do Not Operate Correctly.

R2 CHECK THE MICROPHONE CIRCUITS TO THE APIM (Accessory Protocol Interface Module) FOR A SHORT TO VOLTAGE - 4.2-INCH (107 mm) SCREEN SYNC(R)

- Ignition OFF.

- Disconnect: APIM (Accessory Protocol Interface Module) C3342.

- Ignition ON.

- Measure the voltage between the APIM (Accessory Protocol Interface Module) C3342-5, circuit VMM23 (BN/VT), harness side and ground; and between the APIM (Accessory Protocol Interface Module) C3342-6, circuit RMM23, harness side and ground.

Is any voltage present?

Yes
REPAIR the circuit in question. TEST the system for normal operation.

No
GO to R3.

R3 CHECK THE MICROPHONE CIRCUITS TO THE APIM (Accessory Protocol Interface Module) FOR AN OPEN OR SHORT TO GROUND - 4.2-INCH (107 mm) SCREEN SYNC(R)

NOTE: Do not remove the microphone to test the wiring. Lower the headliner to disconnect the pigtail connector. Pulling the microphone from the headliner will internally damage the microphone.

- Ignition OFF.

- Disconnect: Microphone C9221.

- 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 C9221-2 C3342-5, then ground VMM23 (BN/VT) C9221-3 C3342-6, then ground RMM23

Is the resistance less than 5 ohms between the microphone and the APIM (Accessory Protocol Interface Module), and greater than 10,000 ohms between the microphone and ground?

Yes
GO to R6.

No
REPAIR the circuit in question. TEST the system for normal operation.

R4 CHECK THE MICROPHONE CIRCUITS TO THE APIM (Accessory Protocol Interface Module) FOR A SHORT TO VOLTAGE - 8-INCH (203 mm) TOUCHSCREEN SYNC(R)

- Ignition OFF.

- Disconnect: APIM (Accessory Protocol Interface Module) C2383.

- Ignition ON.

- Measure the voltage between the APIM (Accessory Protocol Interface Module) C2383-12, circuit VMM23 (BN/VT), harness side and ground; and between the APIM (Accessory Protocol Interface Module) C2383-13, circuit RMM23, harness side and ground.

Is any voltage present?

Yes
REPAIR the circuit in question. TEST the system for normal operation.

No
GO to R5.

R5 CHECK THE MICROPHONE CIRCUITS TO THE APIM (Accessory Protocol Interface Module) FOR AN OPEN OR SHORT TO GROUND - 8-INCH (203 mm) TOUCHSCREEN SYNC(R)

NOTE: Do not remove the microphone to test the wiring. Lower the headliner to disconnect the pigtail connector. Pulling the microphone from the headliner will internally damage the microphone.

- Ignition OFF.

- Disconnect: Microphone C9221.

- 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 C9221-2 C2383-12, then ground VMM23 (BN/VT) C9221-3 C2383-13, then ground RMM23

Is the resistances greater than 10,000 ohms?

Yes
GO to R7.

No
REPAIR the circuits. TEST the system for normal operation.

R7 ISOLATE THE MICROPHONE

- Install a new microphone. Refer to Microphone .

- Test the voice recognition for normal operation.

Is the voice recognition functioning correctly?

Yes
The concern was caused by an inoperative microphone. The system is operating correctly at this time.

No
GO to R8.

R8 CHECK FOR CORRECT APIM (Accessory Protocol Interface Module) OPERATION

- 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.