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.

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HOMESERVICE MANUALSMERCURY2009MILAN PREMIER, 3.0 1, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1010 (MODULE COMMUNICATIONS NETWORK)DIAGNOSTIC TESTSCOMMUNICATIONS NETWORKSYMPTOM CHART

2009 Mercury Milan Premier, 3.0 1, AWD

Symptom Chart

2009 Mercury Milan Premier, 3.0 1, AWDSECTION Symptom Chart

WARNING: This page is about a different car, the 2008 Mercury Milan, 2008 Lincoln MKZ, and 2008 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

Symptom Chart

Condition	Possible Sources	Action
The PCM does not respond to the scan tool	Wiring, terminals or connectors PCM	REFER to the Introduction - Gasoline Engines article, pinpoint test QA before proceeding to Pinpoint Test A. If pinpoint test QA has been completed, go to Pinpoint Test A .
The transmission control module (TCM) does not respond to the scan tool	Fuse Wiring, terminals or connectors TCM	Go to Pinpoint Test B .
The ABS module does not respond to the scan tool	Fuse Wiring, terminals or connectors ABS module	Go to Pinpoint Test C .
The restraints control module (RCM) does not respond to the scan tool	Fuse Wiring, terminals or connectors Case ground open RCM	Go to Pinpoint Test D .
The 4X4 control module (if equipped) does not respond to the scan tool	Fuse Wiring, terminals or connectors 4X4 control module	Go to Pinpoint Test E .
The occupant classification system module (OCSM) does not respond to the scan tool	Fuse Wiring, terminals or connectors OCSM	Go to Pinpoint Test F .
The instrument cluster (IC) does not respond to the scan tool	Fuse Wiring, terminals or connectors IC	Go to Pinpoint Test G .
The smart junction box (SJB) does not respond to the scan tool	Fuse Wiring, terminals or connectors SJB	Go to Pinpoint Test H .
The heating ventilation air conditioning (HVAC) module (if equipped) does not respond to the scan tool	Fuse Wiring, terminals or connectors HVAC module	Go to Pinpoint Test I .
The parking aid module (PAM) does not respond to the scan tool	Fuse Wiring, terminals or connectors PAM	Go to Pinpoint Test J .
The audio control module (ACM) does not respond to the scan tool	Fuse Wiring, terminals or connectors ACM	Go to Pinpoint Test K .
The audio digital signal processing (DSP) module not respond to the scan tool	Fuse Wiring, terminals or connectors DSP module	Go to Pinpoint Test L .
The satellite digital audio receiver system (SDARS) module does not respond to the scan tool	Fuse Wiring, terminals or connectors SDARS module	Go to Pinpoint Test M .
The driver door module (DDM) does not respond to the scan tool	Fuse Wiring, terminals or connectors DDM	Go to Pinpoint Test N .
The driver seat module (DSM) does not respond to the scan tool	Fuse Wiring, terminals or connectors DSM	Go to Pinpoint Test O .
The dual climate control seat module (DCSM) does not respond to the scan tool	Fuse Wiring, terminals or connectors DCSM	Go to Pinpoint Test P .
The accessory protocol interface module (APIM) does not respond to the scan tool	Fuse Wiring, terminals or connectors APIM	Go to Pinpoint Test Q .
No medium speed controller area network (MS-CAN) communication, all modules are not responding	Wiring, terminals or connectors APIM (if equipped) ACM DSP module (if equipped) DDM (if equipped) DSM (if equipped) DCSM (if equipped) HVAC module (if equipped) IC PAM (if equipped) SDARS module (if equipped) SJB	Go to Pinpoint Test R .
Intermittent no medium speed controller area network (MS-CAN) communication, one or more modules are not responding during network test	Wiring, terminals or connectors	Go to Pinpoint Test S .
No high speed controller area network (HS-CAN) communication, all modules are not responding	Wiring, terminals or connectors ABS module APIM (if equipped) IC OCSM PCM RCM TCM 4X4 control module (if equipped)	Go to Pinpoint Test T .
Intermittent no high speed controller area network (HS-CAN) communication, one or more modules are not responding during network test	Wiring, terminals or connectors	Go to Pinpoint Test U .
No power to the scan tool	Fuse Wiring, terminals or connectors Scan tool	Go to Pinpoint Test V .

RENDER: 1.0x

NO RELATED

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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.