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 1579 (CHARGING SYSTEM)DIAGNOSIS AND TESTINGPRINCIPLES OF OPERATIONPID CHART
2009 Mercury Milan Premier, 3.0 1, AWD
PID Chart
2009 Mercury Milan Premier, 3.0 1, AWDSECTION PID Chart
WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
PID CHART
| PID | Description | Normal Display | Associated Circuit Name | Connector, Circuit |
|---|---|---|---|---|
| GENMON | Generator Monitor | Constant fluctuating percentage 3%-98% | Generator monitor (GENMON) | C102A-1, CDC15 (VT) |
| GENCMD | Generator Command | Fluctuating percentage or small intermittent bursts 3%-98% | Generator communication (GENCOM) | C102A-2, CDC10 (BU/OG) |
| GENVDSD | Generator Voltage Desired | Voltage varies by vehicle needs - May be controlled by an output state control | - | - |
| GENFIL | Generator Fault Indicator Lamp | OFF if charging system is OK | - | - |
| GENCMD_LF | Generator Command Line Fault | NO FAULT if GENCOM circuit (GENCMD PID) is OK | - | - |
| GENMON_HZ | Generator Monitor Frequency | Frequency value | - | - |
| VPWR | Module Supply Voltage | Within 0.5 volt of battery voltage | - | - |
| RPM | Engine Revolutions Per Minute | Engine RPM - May be controlled by an output state control | - | - |
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.