Pinpoint Test P: Voice Recognition Is Inoperative/Does Not Operate Correctly
Information and Entertainment System
Pinpoint Test P: Voice Recognition Is Inoperative/Does Not Operate Correctly
Normal Operation - Vehicles Without Navigation
When the VOICE switch is pressed, it changes a reference voltage signal, and the audio 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.
Vehicles With Navigation
When the VOICE switch is pressed, it changes a reference voltage signal, and the audio system enters voice recognition mode. The VOICE switch is wired to the Audio Control Module (ACM). A microphone, located in the headliner, receives the voice command and sends a signal to the APIM (Accessory Protocol Interface Module). The APIM (Accessory Protocol Interface Module) receives the microphone input and broadcasts it to the ACM (Audio Control Module). The first voice commands spoken determine which system handles the voice commands.
The microphone test is available through the scan tool or through the ACM (Audio Control Module) self-diagnostic mode. Running this test causes the ACM (Audio 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 Control Module) indicating the tone was heard.
- DTC B1D79:01 (Microphone Input Circuit: General Electrical Failure)- set by the APIM (Accessory Protocol Interface Module) during the on-demand self-test if the microphone is not detected.
- DTC B1D79:01 (Microphone Input: General Electrical Failure)- set by the ACM (Audio Control Module) during the microphone test when it does not receive an adequate signal from the microphone when the test tone is sounded.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Microphone
- Steering wheel controls
- ACM (Audio Control Module) (if equipped with navigation)
- APIM (Accessory Protocol Interface Module)
PINPOINT TEST P : 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 will result in false resistance readings.
P1 CHECK THE OPERATION OF THE STEERING WHEEL CONTROLS
- Operate the audio system in radio tuner (AM/FM) mode.
- Press the VOICE button on the steering wheel controls.
Does the audio system enter voice recognition mode?
Yes
GO to P2.
No
GO to Pinpoint Test M to diagnose the steering wheel controls. Pinpoint Test M: The Steering Wheel Controls Are Inoperative/Do Not Operate Correctly
P2 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 P3.
Otherwise, the system is operating correctly at this time. ADVISE the customer on the correct operation of the voice recognition system.
No
GO to P6.
P3 CHECK THE MICROPHONE SIGNAL TO THE ACM (Audio Control Module)
- Operate the audio system in radio tuner (AM/FM) mode.
- Disconnect: ACM (Audio Control Module) C240C.
NOTE: ACM (Audio Control Module) C240C must be disconnected after the ACM (Audio Control Module) is powered on or the ACM (Audio Control Module) will not receive the RUN message over the network.
- Press the VOICE button on the steering wheel controls.
- While speaking a command, measure the AC voltage between the ACM (Audio Control Module) C240C-11, circuit VMT02 (GN/OG), harness side and the ACM (Audio Control Module) C240C-12, circuit RMT02 (BN/YE), harness side.
Is a fluctuating AC voltage present?
Yes
GO to P12.
No
GO to P4.
P4 CHECK THE MICROPHONE CIRCUITS TO THE ACM (Audio 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 Control Module) C240C-11, circuit VMT02 (GN/OG), harness side and ground; and between the ACM (Audio Control Module) C240C-12, circuit RMT02 (BN/YE), harness side and ground.
Is any voltage present?
Yes
REPAIR the circuit in question. TEST the system for normal operation.
No
GO to P5.
P5 CHECK THE MICROPHONE CIRCUITS TO THE ACM (Audio Control Module) FOR AN OPEN OR SHORT TO GROUND
- Ignition OFF.
- Measure the resistance between the ACM (Audio Control Module) C240C-11, circuit VMT02 (GN/OG), harness side and the APIM (Accessory Protocol Interface Module) C3342-12, circuit VMT02 (GN/OG), harness side; and between the ACM (Audio Control Module) C240C-11, circuit VMT02 (GN/OG), harness side and ground.
- Measure the resistance between the ACM (Audio Control Module) C240C-12, circuit RMT02 (BN/YE), harness side and the APIM (Accessory Protocol Interface Module) C3342-13, circuit RMT02 (BN/YE), harness side; and between the ACM (Audio Control Module) C240C-12, circuit RMT02 (BN/YE), harness side and ground.
Is the resistance less than 5 ohms between the ACM (Audio Control Module) and the APIM (Accessory Protocol Interface Module), and greater than 10,000 ohms between the ACM (Audio Control Module) and ground?
Yes
GO to P11.
No
REPAIR the circuit in question. TEST the system for normal operation.
P6 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 C3342-6 VMN02 (WH/BN) C9221-2 C3342-5 RMN02 (VT/BN)
Are the resistances less than 5 ohms?
Yes
GO to P7.
No
REPAIR the circuit. TEST the system for normal operation.
P7 CHECK THE MICROPHONE CIRCUITS FOR A SHORT TO GROUND
- Measure the resistance between the microphone C9221-1, circuit VMN02 (WH/BN), harness side and ground; and between the microphone C9221-2, circuit RMN02 (VT/BN), harness side and ground.
Are the resistances greater than 10,000 ohms?
Yes
GO to P8.
No
REPAIR the circuit. TEST the system for normal operation.
P8 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 VMN02 (WH/BN) C9221-2 Ground RMN02 (VT/BN) C9221-3 Ground DMN02 (none)
Is any voltage present?
Yes
REPAIR the circuit in question. TEST the system for normal operation.
No
GO to P9.
P9 CHECK THE MICROPHONE CIRCUITS FOR A SHORT TOGETHER
- Ignition ON.
- Measure the resistance between the microphone, harness side as follows:
Positive Meter Lead Circuit Negative Meter Lead Circuit C9221-1 VMN02 (WH/BN) C9221-2 RMN02 (VT/BN) C9221-1 VMN02 (WH/BN) C9221-3 DMN02 (none) C9221-2 RMN02 (VT/BN) C9221-3 DMN02 (none)
Are the resistances greater than 10,000 ohms?
Yes
GO to P10.
No
REPAIR the circuit in question. TEST the system for normal operation.
P10 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 P11.
P11 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.
P12 CHECK FOR CORRECT ACM (Audio Control Module) OPERATION
- Disconnect all the ACM (Audio Control Module) connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the ACM (Audio 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 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.