Pinpoint Test AA: The SYNC System Audible Prompts Are Inoperative/Do Not Operate Correctly
Information and Entertainment System
Pinpoint Test AA: The SYNC System Audible Prompts Are Inoperative/Do Not Operate Correctly
Refer to Wiring Diagram Set 130, Audio System/Navigation for schematic and connector information. Diagrams By Number
Normal Operation
The Text-To-Speech (TTS) and voice prompt features speak certain text information and interaction requests in order to minimize driver distraction while driving. The ring tone alerts the driver to an incoming call.
Audible prompts can range from a simple tone to more elaborate spoken text, based on the customer setting. When the interaction mode is set to standard, detailed guidance is provided. When the interaction mode is set to advanced, most prompts are tones only and minimal audible guidance is provided. Refer to the Owner's Literature for further information on voice interaction.
The audio signals for the TTS and voice prompt features, the ring tones, and audio from the outside device during a phone call, are sent from the Accessory Protocol Interface Module (APIM) to the Audio Control Module (ACM).
This pinpoint test is intended to diagnose the following:
- Customer setting
- Wiring, terminals or connectors
- APIM
- ACM
PINPOINT TEST AA: THE SYNC SYSTEM AUDIBLE PROMPTS ARE INOPERATIVE/DO 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.
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AA1 CHECK THE AUDIBLE PROMPT SETTING
- Operate the audio system in SYNC mode.
- Verify the audible prompts are enabled. Refer to "SYNC Voice Recognition Feature" in the Owner's Literature.
- Press the VOICE button on the steering wheel controls and listen for the SYNC audible prompt.
- Does the SYNC system produce an audible prompt correctly?
Yes
The system is operating correctly at this time. The concern was caused by a customer setting. INSTRUCT the customer in the correct operation of the audible prompt feature.
No
GO to AA2.
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AA2 CHECK FOR A VOLTAGE SIGNAL FROM THE APIM
- Operate the audio system in SYNC mode, and verify the audible prompts are enabled. Refer to "SYNC Voice Recognition Feature" in the Owner's Literature.
- While pressing the VOICE button repeatedly, measure the AC voltage by backprobing between the ACM C240c-4 or C2253c-4, circuit VMN14 (WH/VT), harness side and the ACM C240c-5 or C2253c-5, circuit RMN14 (GY/BN), harness side.
- Is an AC voltage produced each time the VOICE button is pressed?
Yes
GO to AA6.
No
GO to AA3.
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AA3 CHECK THE AUDIBLE PROMPT CIRCUITS FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: ACM C240c (Without Navigation) or C2253c (With Navigation).
- Disconnect: APIM C3342.
- Ignition ON.
- Measure the voltage between the APIM C3342-3, circuit VMN14 (WH/VT), harness side and ground; and between the APIM C3342-4, circuit RMN14 (GY/BN), harness side and ground.
- Is any voltage present?
Yes
REPAIR the circuit in question. TEST the system for normal operation.
No
GO to AA4.
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AA4 CHECK THE AUDIBLE PROMPT CIRCUITS FOR AN OPEN OR SHORT TO GROUND
- Ignition OFF.
- Measure the resistance between the APIM C3342-3, circuit VMN14 (WH/VT), harness side and the ACM C240c-4 or C2253c-4, circuit VMN14 (WH/VT), harness side; and between the APIM C3342-3, circuit VMN14 (WH/VT), harness side and ground.
- Measure the resistance between the APIM C3342-4, circuit RMN14 (GY/BN), harness side and the ACM C240c-5 or C2253c-5, circuit RMN14 (GY/BN), harness side; and between the APIM C3342-4, circuit RMN14 (GY/BN), harness side and ground.
- Is the resistance less than 5 ohms between the APIM and the ACM, and greater than 10,000 ohms between the APIM and ground?
Yes
GO to AA5.
No
REPAIR the circuit in question. TEST the system for normal operation.
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AA5 CHECK FOR CORRECT APIM OPERATION
- Connect: ACM C240c (Without Navigation) or C2253c (With Navigation).
- Disconnect the APIM connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the APIM connector and make sure it seats correctly.
- Wait 2 minutes for the APIM to re-initialize.
- Is the concern still present?
Yes
INSTALL a new APIM. REFER to Accessory Protocol Interface Module (APIM) 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.
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AA6 CHECK FOR CORRECT ACM OPERATION
- Ignition OFF.
- Disconnect all the ACM connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the ACM 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. 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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