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Makes 🢒 Cadillac 🢒 2001 🢒 DeVille 🢒 Bulletins 🢒 Info - Changes to Tire Pressure Monitor (UJ6) and Reprogramming Instructions

Info - Changes to Tire Pressure Monitor (UJ6) and Reprogramming Instructions

Subject:Changes to Tire Pressure Monitor (RPO UJ6) and Reprogramming Instructions

Models:2001 Cadillac DeVille, Seville


What's New?

For model year 2001, Cadillac has added the availability of a Tire Pressure Monitoring (TPM) system (UJ6). This system allows the driver to view each tire's air pressure individually on the Driver Information Center (DIC) manually checking the air pressure in each tire. This system automatically warns the driver of an under-inflated or over-inflated tire by illuminating a "Check Tire Pressure" message. The system incorporates four uniquely coded wheel mounted air pressure sensors, on the inside rim of the wheels, at the valve stem location.

How Does This Affect Service?

The components of this system require specific programming and replacement procedures. Take a moment to familiarize yourself with these important points:

    • The TPM system must be reprogrammed any time that the tires are rotated or a wheel mounted air pressure sensor is replaced. If the TPM system is not reprogrammed after tire rotation, the DIC will report the individual tire pressures at an incorrect wheel location.
    • If a wheel sensor is replaced, no data will be displayed for that wheel location until reprogramming is completed.
    • The wheel mounted air pressure sensors are affixed to the inside rim of the wheel using specific parts. The valve core has a special nickel plating to prevent corrosion on the aluminum wheel. Use only the parts listed in the GM Parts Catalog.
    • During sensor replacement, the attaching nut MUST be torqued to 4 N·m (35 lb in) to ensure a proper seal without damaging the grommet or sensor.

Updates That Happened With VIN #U115021

Since the start of production, a change was made to widen the range of the system for over-inflation. The original system programming displays the "Check Tire Pressure" message if air pressure drops to 165 kPa (24 psi) or rises to 248 kPa (36 psi). The updated programming still lights the DIC message at 165 kPa (24 psi) but extends the upper range to 269 kPa (39 psi) before warning the driver. All current Owner's Manuals state that the "Check Tire Pressure" message will light at 248 kPa (36 psi). If the vehicle is past the above VIN breakpoint you can assure your customer that the system is functioning correctly or give them a copy of this bulletin.

Do Your Part For Your Customer

This system affords your customer a tool to optimize the ride, handling and gas saving ability of their new vehicle. Do your part and set the air pressure at 207 kPa (30 psi) at the time of delivery (PDI). You can verify the proper recommended air pressure setting by looking at the driver's side rear door for the tire information placard. Never allow a vehicle to be delivered to your customer as it comes "off the truck". Temperature, altitude and extended lot time can add up to make a properly set tire at the factory require adjustment by the time of delivery.

How to Reprogram The System

Use the following procedure whenever the tires are rotated or a wheel sensor is changed. You will need special tool number J-41760 to complete the steps below:

  1. Turn the ignition to the RUN position, but do not start the vehicle.
  2. Press and hold the key fob LOCK and UNLOCK buttons simultaneously until a horn chirp is heard. This should happen within ten seconds.

    3. Important: You will have only one minute per step to complete the next four instructions. If any step is not completed within the one minute time limit, the system will leave the programming mode and you will have to begin again from Step 2.

  3. Go to the LEFT FRONT tire and hold the horseshoe magnet (Kent-Moore tool J-41760) directly over the valve stem until a horn chirp is heard. This should happen within five seconds.
  4. Go to the RIGHT FRONT tire and hold the magnet over the valve stem until a horn chirp is heard.
  5. Go to the RIGHT REAR tire and hold the magnet over the valve stem until a horn chip is heard.
  6. Go to the LEFT REAR tire and hold the magnet over the valve stem until a horn chirp is heard.
  7. A double chirp after the final tire indicates that the system has been successfully programmed. If you do not hear the double horn chirp, the system did not program properly and you will have to begin at Step 2 again.
  8. Scroll through the DIC scanner with the mode button to verify that the tire pressures are displayed for all four wheel locations. If any data is missing, repeat from Step 2.