Cherokee 4WD L6-4.0L VIN S (1998)
Speedometer Head: Testing and Inspection
If the problem being diagnosed is related to speedometer accuracy, be certain to confirm that the problem is with the speedometer gauge and not with an
incorrect speedometer pinion gear, axle ratio, or tire size. Refer to Transmission and Drivetrain for more information on the speedometer pinion gear.
WARNING: ON VEHICLES EQUIPPED WITH AIR-BAGS, REFER TO AIR BAGS AND SEAT BELTS/AIR BAGS BEFORE
ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE.
FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIR-BAG DEPLOYMENT AND POSSIBLE
PERSONAL INJURY.
Diagnosis of the vehicle speed sensor and circuit, the Chrysler Collision Detection (CCD) data bus, and/or the Powertrain Control Module (PCM)
should be performed with a DRB scan tool. For diagnosis of the speedometer and the instrument cluster circuitry, see Instrument Panel, Gauges and
Warning Indicators/Instrument Panel.
