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Home >> Ford >> 2012 >> Explorer Limited, 3.5 8, AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Symptom Charts (Except Diesel & Hybrid) >> No Diagnostic Trouble Codes (DTCs) Present Symptom Charts >> Chart 12

Chart 12

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.
SYSTEM/COMPONENT REFERENCE ( PINPOINT TESTS 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 article 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
REFER to the appropriate Automatic Transaxle/Transmission External Controls article
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 .