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Pinpoint Test C: The Speedometer/Odometer Is Inoperative

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
  1. C1 RETRIEVE THE RECORDED DTCs FROM BOTH CONTINUOUS AND ON-DEMAND PCM SELF-TESTS 
    • Check the recorded PCM DTCs from the continuous and on-demand self-tests.
    • Are any PCM DTCs recorded? 
    1. YES  : REFER to INTRODUCTION - GASOLINE ENGINES or INTRODUCTION -- HYBRID ENGINES article.
    2. NO  : Go to  C2.
  2. C2 CARRY OUT THE SPEEDOMETER ACTIVE COMMAND USING THE SCAN TOOL 
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: Instrument Cluster Active Command
    • Select the instrument cluster speedometer active command. Select the speedometer and scroll in increments of 10% while monitoring the speedometer. The speed indicated should increase in increments of approximately 20 km/h (12 mph) for each 10% change.
    • Does the speed indicated increase within specifications? 
    1. YES  : Go to  C3.
    2. NO  : Go to  C4.
  3. C3 MONITOR THE VEHICLE SPEED SENSOR (VSS) PID 
    • Enter the following diagnostic mode on the diagnostic tool: PCM PID (Escape, Mariner) or TCM PID (Hybrid)
    • Monitor the vehicle speed PID, VSS (Escape, Mariner) or VSS_TCM (Hybrid), while driving the vehicle.
    • Does the PCM vehicle speed PID (Escape, Mariner) or TCM (Hybrid) vehicle speed PID match the speedometer reading on the instrument cluster? 
    1. YES  : Go to  C4.
    2. NO  : For Escape, Mariner, go to  C5 .

      For Hybrid, go to  C6 .

  4. C4 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION 
    • Disconnect the instrument cluster connector.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect the instrument cluster connector and make sure it seats correctly.
    • Operate the system and determine if the concern is still present.
    • Is the concern still present? 
    1. YES  : INSTALL a new instrument cluster. REFER to Instrument Cluster . 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.
  5. C5 CHECK FOR CORRECT PCM OPERATION 
    • Disconnect all the PCM connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect the PCM connectors and make sure they seat correctly.
    • Operate the system and determine if the concern is still present.
    • Is the concern still present? 
    1. YES  : INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS - 2.3L article. 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.
  6. C6 CHECK FOR CORRECT TCM OPERATION 
    • Disconnect all the TCM connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect all the TCM connectors and make sure they seat correctly.
    • Operate the system and determine if the concern is still present.
    • Is the concern still present? 
    1. YES  : INSTALL a new TCM. REFER to AUTOMATIC TRANSAXLE/TRANSMISSION - ELECTRONICALLY CONTROLLED CONTINUOUSLY VARIABLE TRANSMISSION (ECVT) article. 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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