2005 Jeep Grand Cherokee Owner's Manual - Page 94

94 UNDERSTANDING THE FEATURES OF YOUR VEHICLE when valid tire pressure sensor messages have been received from all 4 road tires. TPM system function is temporarily unavailable due to external electromagnetic interference, such as electronic devices or nearby radio or TV towers. 4. In addition to monitoring the vehicle tires, the TPM system monitors faults within the system. When any fault has been set, the TPM system will display TIRE SENSOR BAD/MISSING. Be sure to inspect your tires for proper inflation pressure. After you determine that your tires are properly inflated, see your authorized dealer for service to diagnose the problem with the TPM system. 5. With the 5 Tire TPM System, if a road tire is replaced by the spare, the TPM system will automatically detect that the tires have been switched (after the ignition has been cycled) and display SPARE SWAP DETECTED along with a chime. This could take up to 10 minutes with vehicle speed above 25 mph (40 km/h). 6. With the 4 Tire TPM System, if a road tire is replaced by the spare, the TPM system will display TIRE SENSOR BAD/MISSING. This is due to the spare tire not being equipped with a tire pressure sensor. Once the road tire is repaired and/or installed back on the vehicle with the proper tire pressure the message will be removed. This could take up to 10 minutes with vehicle speed above 25 mph (40 km/h).