Chart 12

WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2010 Mercury Milan, 2010 Mercury Mariner, 2010 Mercury Grand Marquis, 2010 Lincoln Town Car, and 2010 Lincoln Navigator L. However, it is still accessible from the selected car via links, so may be relevant.

Warning Indicators: Check Fuel Cap Indicator, Malfunction Indicator Lamp (MIL), Power Take Off (PTO), Temperature Warning Indicator or Gauge (applications with cylinder head temperature [CHT] sensor only), Transmission Control Indicator Lamp (TCIL), Powertrain Malfunction Indicator (Wrench)
PTO Concerns: Not Working Correctly

NOTE:

If the symptom is both a MIL on and exhaust emission test failure, GO directly to Chart 11.
If the engine is a no start, GO directly to Chart 3.
If the engine runs rough at idle, GO directly to Chart 1.

PTO CONCERNS: NOT WORKING CORRECTLY SYMPTOM CHART

SYSTEM/COMPONENT	REFERENCE (article 5 Pinpoint Test unless noted)
Verify the fuel filler cap is correctly tightened or the capless fuel tank filler pipe is correctly sealed.	Visual.
Check Fuel Cap Indicator Never/always on	REFER to the appropriate Instrumentation, Message Center, and Warning Chimes article to diagnose the check fuel cap indicator is never/always on or to diagnose the CHECK FUEL CAP warning is inoperative.
MIL Always on when the engine is running (no DTCs present) Never on (including during indicator prove out)	REFER to the appropriate Instrumentation, Message Center, and Warning Chimes article , and carry out the Inspection and Verification to continue diagnosis.
PTO PTO indicator never/always on PTO not working correctly	GO to PINPOINT TEST FB .
Temperature Warning Indicator or Gauge (applications with CHT sensor only) Engine cooling system Indicator circuits	For an engine that is overheating, REFER to the appropriate Engine Cooling to diagnose the engine overheating symptom. Be aware that since a PCM DTC is not present, the PCM is not attempting to activate the indicator. For an engine operating at normal temperature, GO to PINPOINT TEST DL .
TCIL Always on when the engine is running (no DTCs present) Never on	For E-Series, GO to PINPOINT TEST TB . For all others, REFER to the appropriate Instrumentation, Message Center, and Warning Chimes .
Powertrain Malfunction Indicator (Wrench) Never/always on	REFER to the appropriate Instrumentation, Message Center, and Warning Chimes article to diagnose the wrench indicator is never/always on or to diagnose the POWERTRAIN MALFUNCTION warning is inoperative.
Additional Testing	GO to PINPOINT TEST Z .