Pinpoint Test T: Voice Recognition Is Inoperative/Does Not Operate Correctly - Vehicles Without The SYNC System
Information and Entertainment System
Pinpoint Tests
Pinpoint Test T: 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 interior rear view mirror receives the voice command and sends a signal to the ACM.
The microphone test is available through the Integrated Diagnostic System (IDS) 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 voltage 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
- Microphone (part of the interior rear view mirror)
- ACM
PINPOINT TEST T: 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.
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T1 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 T2.
No
Go To Pinpoint Test D to diagnose the steering wheel controls system. Pinpoint Test D: The Steering Wheel Controls Are Inoperative/Do Not Operate Correctly
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T2 CHECK FOR DTC B1D79:01
- Carry out the microphone test using the scan tool or the ACM self-diagnostic mode.
- Observe the display once the test tone has stopped sounding.
- Is DTC B1D79:01 present?
Yes
GO to T4.
No
GO to T3.
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T3 CHECK THE OPERATION OF THE VOICE RECOGNITION - NAVIGATION SYSTEM
- 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 navigation 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 T4.
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T4 CHECK THE MICROPHONE POWER CIRCUIT
- Ignition OFF.
- Disconnect: Interior Rear View Mirror C9012.
- Ignition ON.
- Measure the voltage between the interior rear view mirror C9012-1, circuit CBP41 (BU), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to T5.
No
REPAIR the circuit. TEST the system for normal operation.
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T5 CHECK THE MICROPHONE GROUND FOR CONTINUITY
- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Measure the resistance between the interior rear view mirror C9012-10, circuit GD133 (BK), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
GO to T6.
No
REPAIR the circuit. TEST the system for normal operation.
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T6 CHECK THE MICROPHONE CIRCUITS FOR A SHORT TO VOLTAGE
- Connect: Negative Battery Cable.
- Disconnect: ACM C240c.
- Ignition ON.
- Measure the voltage between the interior rear view mirror C9012-4, circuit VMM13 (YE/GN), harness side and ground; and between the interior rear view 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 T7.
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T7 CHECK THE MICROPHONE CIRCUITS FOR AN OPEN OR SHORT TO GROUND
NOTE: The microphone circuits change circuit number and color between the ACM and the interior rear view mirror.
- Ignition OFF.
- Measure the resistance between the interior rear view mirror C9012-4, circuit VMM13 (YE/GN), harness side and the ACM C240c-11, circuit VMN01 (BU/BN), harness side; and between the interior rear view mirror C9012-4, circuit VMM13 (YE/GN), harness side and ground.
- Measure the resistance between the interior rear view mirror C9012-5, circuit RMM13 (BU), harness side and the ACM C240c-12, circuit RMN01 (GN), harness side; and between the interior rear view mirror C9012-5, circuit RMM13 (BU), harness side and ground.
- Is the resistance less than 5 ohms between the interior rear view mirror and the ACM, and greater than 10,000 ohms between the interior rear view mirror and ground?
Yes
GO to T8.
No
REPAIR the circuit in question. TEST the system for normal operation.
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T8 ISOLATE THE INTERIOR REAR VIEW MIRROR
- Connect: ACM C240c.
- Install a new interior rear view mirror.
- 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 interior rear view mirror. The system is now operating correctly.
No
GO to T9.
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T9 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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