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Home >> Mercury >> 2008 >> Sable Base, FWD >> 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 (Section 5 Pinpoint Test unless noted)
  1. Verify the fuel filler cap is correctly tightened or the capless fuel tank filler pipe is correctly sealed.
  1. Visual
  1. Check Fuel Cap Indicator
    • Never/always on
  1. REFER to the Workshop Manual Section 413-01, Instrument Cluster to diagnose the check fuel cap indicator is never/always on or Section 413-08 Information and Message Center to diagnose the CHECK FUEL CAP warning is inoperative.
  1. MIL
    • Always on when the engine is running (no DTCs present)
    • Never on (including during indicator prove out)
  1. REFER to the Workshop Manual Section 413-01, Instrument Cluster and carry out the Inspection and Verification to continue diagnosis.
  1. PTO
    • PTO indicator never/always on
    • PTO not working correctly
  1. refer to PINPOINT TEST FB - Power Take Off (PTO) .
  1. Temperature Warning Indicator or Gauge (applications with CHT sensor only)
    • Engine cooling system
    • Indicator circuits
  1. For an engine that is overheating, REFER to the Workshop Manual Section 303-03, 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.
  2. For an engine operating at normal temperature, refer to PINPOINT TEST DL - Cylinder Head Temperature (CHT) Sensor .
  1. TCIL
    • Always on when the engine is running (no DTCs present)
    • Never on
  1. For E-Series, refer to PINPOINT TEST TB - Transmission Control Switch (TCS)/ Transmission Control Indicator Lamp (TCIL) .
  2. For all others, REFER to the Workshop Manual Section 413-01, Instrument Cluster.
  1. Powertrain Malfunction Indicator (Wrench)
    • Never/always on
  1. REFER to the Workshop Manual Section 413-01, Instrument Cluster to diagnose the wrench indicator is never/always on or Section 413-08 Information and Message Center to diagnose the POWERTRAIN MALFUNCTION warning is inoperative .
  1. Additional Testing
  1. refer to PINPOINT TEST Z - Intermittent .
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