Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2012 Ford Taurus AWD V6-3.5LFACTORY OEM SERVICE PROCEDURE
Pinpoint Test T: The Speed Sensitive Volume Does Not Operate Correctly
Information and Entertainment System
Pinpoint Test T: The Speed Sensitive Volume Does Not Operate Correctly
Refer to Wiring Diagram Set 130, Audio/Navigation for schematic and connector information. Diagrams By Number
Normal Operation
The speed sensitive volume function adjusts the volume based on the Vehicle Speed Sensor (VSS) signal from the Instrument Panel Cluster (IPC). The IPC (Instrument Panel Cluster) does not generate the VSS (Vehicle Speed Sensor) signal; it gateways the signal from the PCM. The Smart Junction Box (SJB) also receives this signal and should exhibit symptoms if the signal is lost.
This pinpoint test is intended to diagnose the following:
- Speed sensitive volume setting
- VSS (Vehicle Speed Sensor) signal concern
- Communication network concern
- ACM (Audio Control Module)
PINPOINT TEST T : THE SPEED SENSITIVE VOLUME DOES NOT OPERATE CORRECTLY
T1 CHECK THE SPEEDOMETER OPERATION
- Drive the vehicle and observe the speedometer.
Does the speedometer operate correctly?
Yes
GO to T2.
No
REFER to Instrument Panel, Gauges and Warning Indicators.
T2 CHECK THE SPEED SENSITIVE VOLUME SETTING
- Turn the speed sensitive volume off. Refer to the Owner's Literature.
- Operate the audio system in radio tuner (AM/FM) mode.
- Drive the vehicle at various speeds and observe the speaker volume.
- Set the speed sensitive volume to maximum compensation. Refer to the Owner's Literature.
- Operate the audio system in radio tuner (AM/FM) mode.
- Drive the vehicle at various speeds and observe the speaker volume.
Does the volume remain constant with the speed sensitive volume turned off, and increase and decrease with vehicle speed with the speed sensitive volume set to maximum?
Yes
The system is operating correctly at this time. INSTRUCT the customer in the correct usage of the speed sensitive volume feature.
No
GO to T3.
T3 CHECK FOR DTC U0155 OR DTC U0155:00
- Using the scan tool, retrieve all continuous DTCs.
Is DTC U0155 or DTC U0155:00 retrieved in any module?
Yes
GO to Pinpoint Test AG. Pinpoint Test AG: DTC U0155 Or DTC U0155:00
No
GO to T4.
T4 CHECK FOR CORRECT ACM (Audio Control Module) OPERATION
- Disconnect all the ACM (Audio Control Module) connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the ACM (Audio Control Module) connectors and make sure they seat correctly.
- Operate the system and determine if the concern is still present.
Is the concern still present?
Yes
INSTALL a new ACM (Audio Control Module). REFER to 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. CLEAR any DTCs present.
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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