Pinpoint Test Y: The Voice Guidance Is Inoperative/Does Not Operate Correctly
Information and Entertainment System
Pinpoint Test Y: The Voice Guidance Is Inoperative/Does Not Operate Correctly
Refer to Wiring Diagram Set 130 (Fusion/Milan/MKZ, Fusion Hybrid, Milan Hybrid, MKZ Hybrid), Audio System/Navigation for schematic and connector information. Diagrams By Number
Normal Operation - Premium Sound
The voice-assisted route guidance is broadcast through the front speakers. The voice guidance volume can be adjusted using the settings on the Audio Control Module (ACM).
Sony(R) or THX(R) Sound
The voice-assisted route guidance is broadcast through the instrument panel speaker. The volume can be adjusted using the settings on the ACM. The ACM sends the voice guidance audio signals to the audio Digital Signal Processing (DSP) module through a dedicated pair of circuits.
- DTC B1A07:01 (Speaker #7: General Electrical Failure) - sets when a fault is detected in the navigation audio circuits.
This pinpoint test is intended to diagnose the following:
- Incorrect voice guidance setting
- Wiring, terminals or connectors (except premium sound)
- Audio DSP module (except premium sound)
- ACM
PINPOINT TEST Y: THE VOICE GUIDANCE 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.
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Y1 CHECK THE VOICE GUIDANCE SETTING
- Adjust the voice volume to approximately 50%. Refer to the Owner's Literature.
- Set a destination and start the route using the navigation controls. Refer to the Owner's Literature.
- Observe the voice guidance.
- Does the voice guidance operate correctly?
Yes
The concern was caused by an incorrect customer setting. INSTRUCT the customer in the correct use of the voice guidance feature.
No
GO to Y2.
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Y2 CHECK THE SPEAKER OUTPUT
- Carry out the speaker walk test. Refer to Audio Control Module (ACM) Self-Diagnostic Mode Audio Control Module (ACM) Self-Diagnostic Mode.
- Do the front speakers (premium sound) or instrument panel speaker (Sony(R) or THX(R) sound) operate correctly?
Yes
For premium sound, GO to Y6.
For Sony(R) or THX(R) sound, GO to Y3.
No
For premium sound, GO to Pinpoint Test D. Pinpoint Test D: Poor Quality/Distorted/No Sound From One Or More Speakers (Not All Speakers) - Premium Sound
For Sony(R) sound, GO to Pinpoint Test E. Pinpoint Test E: Poor Quality/Distorted/No Sound From One Or More Speakers (Not All Speakers) - Sony(R) Sound
For THX(R) sound, GO to Pinpoint Test F. Pinpoint Test F: Poor Quality/Distorted/No Sound From One Or More Speakers (Not All Speakers) - THX(R) Sound
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Y3 CHECK THE NAVIGATION AUDIO SIGNAL TO THE AUDIO DSP MODULE
- Ignition OFF.
- Disconnect: Audio DSP Module 4240c (Sony(R)) Or C4235c (THX(R)) .
- Operate the audio system in navigation mode.
- For Sony(R) sound, while pressing the REPEAT button on the ACM, measure the AC voltage between the audio DSP module C4240c-4, circuit VMN07 (GY), harness side and the audio DSP module C4240c-14, circuit RMN07 (VT), harness side.
- For THX(R) sound, while pressing the REPEAT button on the ACM, measure the AC voltage between the audio DSP module C4235c-6, circuit VMN07 (GY), harness side and the audio DSP module C4235c-16, circuit RMN07 (VT), harness side.
- Is a fluctuating AC voltage present?
Yes
GO to Y7.
No
GO to Y4.
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Y4 CHECK THE NAVIGATION AUDIO SIGNAL CIRCUITS FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: ACM C240a .
- Ignition ON.
- For Sony(R) sound, measure the voltage between the audio DSP module C4240c-4, circuit VMN07 (GY), harness side and ground; and between the audio DSP module C4240c-14, circuit RMN07 (VT), harness side and ground.
- For THX(R) sound, measure the voltage between the audio DSP module C4235c-6, circuit VMN07 (GY), harness side and ground; and between the audio DSP module C4235c-16, circuit RMN07 (VT), harness side and ground.
- Is any voltage present?
Yes
REPAIR the circuit in question. TEST the system for normal operation.
No
GO to Y5.
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Y5 CHECK THE NAVIGATION AUDIO SIGNAL CIRCUITS FOR AN OPEN OR SHORT TO GROUND
- Ignition OFF.
- Measure the resistance between the audio DSP module, harness side and the ACM, harness side; and between the audio DSP module, harness side and ground as follows:
- Is the resistance less than 5 ohms between the audio DSP module and the ACM, and greater than 10,000 ohms between the audio DSP module and ground?
Yes
GO to Y6.
No
REPAIR the circuit in question. TEST the system for normal operation.
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Y6 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.
- 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) - Fusion, Milan Audio Control Module (ACM) or Audio Control Module (ACM) - MKZ Audio Control Module (ACM). TEST the system for normal operation after the repair.
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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Y7 CHECK FOR CORRECT AUDIO DSP MODULE OPERATION
- Disconnect all the audio DSP module connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the audio DSP 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 audio DSP module. REFER to Audio Digital Signal Processing (DSP) Module Audio Digital Signal Processing (DSP) Module. 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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