SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSJEEP2009WRANGLER RUBICON, AUTOMATICREPAIR AND DIAGNOSISTRANSMISSIONAUTOMATIC TRANS(TRANSMISSION CONTROL MODULE (TCM) - ELECTRICAL DIAGNOSTICS)DTC TROUBLESHOOTINGP0721-OUTPUT SPEED SENSOR CIRCUIT PERFORMANCEDIAGNOSTIC TEST
2009 Jeep Wrangler Rubicon, Automatic

Diagnostic Test

2009 Jeep Wrangler Rubicon, AutomaticSECTION Diagnostic Test
  1. CHECK TO SEE IF DTC P0721 IS CURRENT 
    1. Turn the ignition off to the lock position.
      CAUTION: Properly support the vehicle and raise all drive wheels off the ground.
    2. Release the parking brake.
    3. Start the engine in park.
    4. Place the transmission gear selector in drive, release foot from brake.
      WARNING: Be sure to keep hands and feet clear of rotating wheels.
    5. With the scan tool, monitor the Output Speed Sensor RPM.

      Is the Output Speed Sensor RPM below 100 RPM?

      Yes 

      • Go to step  2

      No 

      • Go to step  9
  2. OUTPUT SPEED SENSOR 
    1. Turn the ignition off to the lock position.
    2. Remove the Ignition Switch Feed fuse from the TIPM.
      CAUTION: Removal of the Ignition Switch Feed fuse from the TIPM will prevent the vehicle from being started in gear.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.