Pinpoint Test I: The Audio Volume Cutback Is Inoperative

WARNING: This page is about a different car, the 2010 Lincoln MKX and 2010 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.

I1 CHECK THE ACM CONFIGURATION
- Apply the parking brake.
- Place an object behind the vehicle within the range of the parking aid sensors.
- Ignition ON.
- Apply the brake pedal and place the gear selector in REVERSE (R).
- Enter the following diagnostic mode on the scan tool: ACM DataLogger.
- Monitor the RPA_STAT (Parking Aid Input Status) PID while the parking aid tone is sounding.
- Does the RPA_STAT PID read "Enabled" while the parking aid tone is sounding?
- Yes: GO to I3.
- No: GO to I2 .
I2 CHECK FOR COMMUNICATION WITH THE PAM
- Carry out the network test using the scan tool.
- Does the scan tool communicate with the PAM ?
- Yes: GO to I3 .
- No: REFER to MODULE COMMUNICATIONS NETWORK to diagnose the PAM does not respond to the scan tool.
I3 CHECK FOR CORRECT ACM OPERATION
- Disconnect the ACM connector.
- Check for:
  - corrosion
  - damaged pins
  - pushed-out pins
- Connect the ACM connector and make sure it seats correctly.
- Operate the system and determine if the concern is still present.
- Is the concern still present?
- Yes: INSTALL a new ACM . REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . 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.