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 button (an icon of someone speaking) is pressed, the Audio Control Module (ACM) detects the change in reference voltage on circuit VME14 (GY/YE) and enters voice recognition mode. A microphone located in the auto-dimming interior mirror receives the voice command and sends a signal to the ACM through circuits VMN02 (WH/BN) and RMN02 (VT/BN). Power to the auto-dimming interior mirror is provided through circuit CBP41 (BU), and ground through circuit GD133 (BK).
The microphone test is available through the scan tool. 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 B2633 (Driver-Front Microphone Circuit Failure) - set by the ACM during the microphone test when the ACM 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 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 CONTROL SWITCHES
- 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 E to diagnose the steering wheel controls system. Pinpoint Test E: The Steering Wheel Controls Are Inoperative/Do Not Operate Correctly
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P2 CHECK CIRCUIT CBP41 (BU) FOR VOLTAGE
- 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 P3.
No
VERIFY the Smart Junction Box (SJB) fuse 41 (10A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation. If not OK, Refer to the Wiring Diagrams to identify the possible causes of the circuit short.
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P3 CHECK CIRCUIT GD133 (BK) FOR AN OPEN
- Disconnect: Negative Battery Cable.
- Ignition OFF.
- 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 P4.
No
REPAIR the circuit GD133 (BK) for an open. CLEAR the DTCs. REPEAT the self-test.
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P4 CHECK THE MICROPHONE CIRCUITS FOR A SHORT TO VOLTAGE
- Connect: Negative Battery Cable.
- Disconnect: ACM C240c.
- Ignition ON.
- Measure the voltage between the auto-dimming interior mirror C9012-4, circuit VMN02 (WH/BN), harness side and ground; and between the auto-dimming interior mirror C9012-5, circuit RMN02 (VT/BN), harness side and ground.
- Is any voltage present?
Yes
REPAIR the circuit in question. TEST the system for normal operation.
No
GO to P5.
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P5 CHECK THE MICROPHONE CIRCUITS FOR AN OPEN OR SHORT TO GROUND
- Ignition OFF.
- Measure the resistance between the auto-dimming interior mirror, harness side and the ACM, harness side; and between the auto-dimming interior mirror, harness side and ground as follows:
- 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 P6.
No
REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
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P6 ISOLATE THE AUTO-DIMMING INTERIOR MIRROR
- Connect: ACM C240c.
- Install a new auto-dimming interior mirror.
- Operate the audio system in radio tuner (AM/FM) mode.
- Press the VOICE button on the steering wheel controls and attempt several voice commands. Refer to the Owner's Literature.
- Does the voice recognition operate correctly?
Yes
The concern was caused by an inoperative auto-dimming interior mirror. The system is now operating correctly.
No
GO to P7.
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P7 CHECK FOR CORRECT ACM OPERATION
- Disconnect all the ACM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the ACM connectors and make sure they seat correctly.
- Connect any disconnected connectors.
- Operate the system and verify the concern is still present.
- 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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