Inspection and Verification: Notes
WARNING: This page is about a different car, the 2009 Mercury Milan, 2009 Lincoln MKZ, and 2009 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
- Verify the customer concern.
- Visually inspect for obvious signs of mechanical or electrical damage.VISUAL INSPECTION CHART
Mechanical Electrical - Audio control module (ACM)
- Antenna
- Audio input jack
- Speaker(s)
- Steering wheel controls
- Universal serial bus (USB) port
- Navigation map DVD
- Noise suppression equipment
- Smart junction box (SJB) fuse(s):
- 12 (7.5A) (accessory delay feed)
- 13 (10A) (accessory protocol interface module [APIM])
- 17 (20A) (subwoofer amplifier) (Audiophile)
- 18 (20A) (ACM hot at all times)
- 20 (7.5A) (satellite digital audio receiver system [SDARS] module hot at all times)
- 22 (7.5A) (ACM hot in START)
- Battery junction box (BJB) fuse(s):
- 20 (20A) (audio digital signal processing [DSP] module)
- 21 (20A) (DSP module)
- Wiring, terminals or connectors
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- If the cause is not visually evident, connect the scan tool to the data link connector (DLC).
- If the scan tool does not communicate with the VCM:
- Check the VCM connection to the vehicle.
- Check the scan tool connection to the VCM.
- Refer to MODULE COMMUNICATIONS NETWORK article, No Power To The Scan Tool, to diagnose no communication with the scan tool.
- If the scan tool does not communicate with the vehicle:
- Verify the ignition key is in the ON position.
- Verify the scan tool operation with a known good vehicle.
- Refer to MODULE COMMUNICATIONS NETWORK article to diagnose no response from the PCM.
- Carry out the network test.
- If the scan tool responds with no communication for one or more modules, refer to MODULE COMMUNICATIONS NETWORK article.
- If the network test passes, retrieve and record the continuous memory DTCs.
- Clear the continuous DTCs and carry out the self-test diagnostics for the ACM.
- If the DTCs retrieved are related to the concern, go to DTC Charts.
- If no DTCs related to the concern are retrieved, go to the Speaker Walk-Around Test (All Audio Systems Except Navigation), the Audio Control Module (ACM) Self-Diagnostic Mode (All Audio Systems Except Navigation), the Audio Control Module (ACM) Self-Diagnostic Mode - Navigation, or the Satellite Audio Bezel Diagnostic Test.
NOTE:
Make sure to use the latest scan tool software release.
NOTE:
The vehicle communication module (VCM) LED prove-out confirms power and ground from the DLC are provided to the VCM.
NOTE:
Do not press any buttons on the ACM while the ACM is carrying out the self-test.