FixVault
Home › Ford › 1997 › Contour Base, Automatic › Repair and Diagnosis › External Pages › Different car › Section 36 (Instrument Panel - Analog) › Symptom Testing › Speedometer/Odometer Inaccurate

Speedometer/Odometer Inaccurate

WARNING: This page is about a different car, the 1997 Mercury Mountaineer and 1997 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Access Vehicle Speed Sensor (VSS). Ensure harness connector is clean, tight and securely attached. Clean, repair or replace as necessary. If VSS harness connector is okay, go to next step.
  2. Perform ODOMETER TEST  under COMPONENT TESTS. If odometer is operating and is accurate, go to next step. If odometer is not operating or is not accurate, go to step 4).
  3. Perform SPEEDOMETER CALIBRATION TEST  under COMPONENT TESTS. If speedometer is operating and is within specification, speedometer is operating properly. If speedometer is not operating or is not within specification, go to next step.
  4. Remove VSS. Ensure proper driven gear is installed. If correct driven gear is installed, go to next step. If driven gear is not correct, replace with correct gear and repeat step 3).
  5. Check for proper drive gear, axle, tires and ratio adapter. If all components are correct and speedometer/odometer reads inaccurately, replace speedometer and retest system. See GAUGES  under REMOVAL & INSTALLATION. If any component is incorrect, replace with correct component and repeat step 3).
About FixVault