Pinpoint Test P: Voice Recognition Is Inoperative/Does Not Operate Correctly - Vehicles Without The SYNC System
Information and Entertainment System
Pinpoint Tests
Pinpoint Test P: Voice Recognition Is Inoperative/Does Not Operate Correctly - Vehicles Without The SYNC System
Refer to Wiring Diagram Set 130, Audio System/Navigation for schematic and connector information. Diagrams By Number
Normal Operation
When the VOICE switch is pressed, it changes the reference voltage from the Audio Control Module (ACM) on the voice recognition circuit and the ACM enters voice recognition mode. A microphone located in the auto-dimming interior mirror receives the voice command and sends a signal to the ACM.
The microphone test is available through the scan tool or through the ACM self-diagnostic mode. Running this test causes the ACM to produce a test tone. If the system is operating correctly, the microphone detects the tone and produces a signal to the ACM indicating the tone was heard.
- DTC B1D79:01 (Microphone Input: General Electrical Failure) - set by the ACM 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:
- Fuse
- Wiring, terminals or connectors
- Steering wheel controls system concern
- Microphone (part of the auto-dimming interior mirror)
- ACM
PINPOINT TEST P: VOICE RECOGNITION IS INOPERATIVE/DOES NOT OPERATE CORRECTLY - VEHICLES WITHOUT THE SYNC SYSTEM
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. Refer to Battery.
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P1 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 P2.
No
GO to Pinpoint Test M to diagnose the steering wheel controls system. Pinpoint Test M: The Steering Wheel Controls Are Inoperative/Do Not Operate Correctly
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P2 CHECK FOR DTC B1D79:01
- Carry out the microphone test. Refer to Audio Control Module (ACM) Self-Diagnostic Mode Audio Control Module (ACM) Self-Diagnostic Mode.
- Observe the display once the test tone has stopped sounding.
- Is DTC B1D79:01 present?
Yes
GO to P4.
No
GO to P3.
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P3 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 "NAVIGATION", and observe the audio system.
- Does the audio system acknowledge the command "NAVIGATION"?
Yes
The system is operating correctly at this time. ADVISE the customer on the correct operation of the voice recognition system.
No
GO to P4.
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P4 CHECK THE MICROPHONE SIGNAL TO THE ACM
- Ignition OFF.
- Disconnect: ACM C240c.
- NOTE: ACM C240a must remain connected for this step to produce accurate results.
- Operate the audio system in radio tuner (AM/FM) mode.
- Press the VOICE switch on the steering wheel controls.
- While speaking a command, measure the AC voltage between the ACM C240c-11, circuit VMM13 (YE/GN), harness side and the ACM C240c-12, circuit RMM13 (BU), harness side.
- Is a fluctuating AC voltage present?
Yes
GO to P9.
No
GO to P5.
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P5 CHECK THE MICROPHONE VOLTAGE SUPPLY
- Ignition OFF.
- Disconnect: Auto-Dimming Interior Mirror C9012.
- Ignition ON.
- Measure the voltage between the auto-dimming interior mirror C9012-1, circuit CBP41 (BU), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to P6.
No
REPAIR the circuit. TEST the system for normal operation.
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P6 CHECK THE MICROPHONE GROUND CIRCUIT FOR CONTINUITY
- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Measure the resistance between the auto-dimming interior mirror C9012-10, circuit GD133 (BK), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
GO to P7.
No
REPAIR the circuit. TEST the system for normal operation.
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P7 CHECK THE MICROPHONE CIRCUITS FOR A SHORT TO VOLTAGE
- Connect: Negative Battery Cable.
- Ignition ON.
- Measure the voltage between the auto-dimming interior mirror C9012-4, circuit VMM13 (YE/GN), harness side and ground; and between the auto-dimming interior mirror C9012-5, circuit RMM13 (BU), harness side and ground.
- Is any voltage present?
Yes
REPAIR the circuit in question. TEST the system for normal operation.
No
GO to P8.
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P8 CHECK THE MICROPHONE CIRCUITS FOR AN OPEN OR SHORT TO GROUND
- Ignition OFF.
- Measure the resistance between the auto-dimming interior mirror C9012-4, circuit VMM13 (YE/GN), harness side and the ACM C240c-11, circuit VMM13 (YE/GN), harness side; and between the auto-dimming interior mirror C9012-4, circuit VMM13 (YE/GN), harness side and ground.
- Measure the resistance between the auto-dimming interior mirror C9012-5, circuit RMM13 (BU), harness side and the ACM C240c-12, circuit RMM13 (BU), harness side; and between the auto-dimming interior mirror C9012-5, circuit RMM13 (BU), harness side and ground.
- Is the resistance less than 5 ohms between the auto-dimming interior mirror and the ACM, and greater than 10,000 ohms between the auto-dimming interior mirror and ground?
Yes
GO to P9.
No
REPAIR the circuit in question. TEST the system for normal operation.
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P9 ISOLATE THE AUTO-DIMMING INTERIOR MIRROR
- Connect: ACM C240c.
- Install a new auto-dimming interior mirror. Refer to Mirrors.
- 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 auto-dimming interior mirror. The system is now operating correctly.
No
GO to P10.
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P10 CHECK FOR CORRECT ACM OPERATION
- Disconnect the ACM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the ACM connectors and make sure they seat correctly.
- Is the concern still present?
Yes
INSTALL a new ACM. REFER to Audio Control Module (ACM) 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.
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