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Home >> Lincoln >> 2008 >> Navigator RWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Cluster (Ic), Message Center, And Warning Chimes >> Diagnostic Tests >> Instrumentation, Message Center and Warning Chimes >> Pinpoint Tests >> Pinpoint Test H: The Tachometer Is Inoperative >> Pinpoint Test H: The Tachometer Is Inoperative

Pinpoint Test H: The Tachometer Is Inoperative

  1. H1 CARRY OUT THE INSTRUMENT CLUSTER (IC) TACHOMETER ACTIVE COMMAND USING THE SCAN TOOL 
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: Instrument Cluster (IC) DataLogger
    • Select the instrument cluster (IC) tachometer (TACH_IND) active command and sweep the gauge in 10% increments.
    • Does the tachometer start at 0 RPM and increase by 700 RPM for each 10% increase commanded? 
    1. YES  : Go to  H2.
    2. NO  : Go to  H3.
  2. H2 RETRIEVE THE RECORDED DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND INSTRUMENT CLUSTER (IC) SELF-TESTS 
    • Check for recorded instrument cluster (IC) DTCs from the continuous self-test.
    • Is DTC U0100 recorded? 
    1. YES  : Go to Pinpoint Test AH .
    2. NO  : Go to  H3.
  3. H3 CHECK FOR CORRECT INSTRUMENT CLUSTER (IC) OPERATION 
    • Disconnect the instrument cluster (IC) connector.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect the instrument cluster (IC) connector and make sure it seats correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    1. YES  : INSTALL a new instrument cluster (IC). REFER to Instrument Cluster (IC) . TEST the system for normal operation.
    2. NO  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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