Magazine for the professional tire industry
Issue link: https://mtd.epubxp.com/i/714120
MTD August 2016 2007-13 Chrysler/Jeep Compass and Patriot Two systems are available, base and premium SUBJECT VEHICLES: 2007-2013 Chrysler/Jeep Compass and Patriot. RELEARN PROCEDURE? Yes. SPECIAL TOOLS NEEDED? Yes, an RKE-TPM analyzer used in conjunction with a scan tool. T h ere are t wo t i re p res su re monitoring systems (TPMS) available for the 2007-2013 Chrysler/Jeep Compass and Patriot, a base system and a premium system. e base system does not specify how many tires are low or where they are located. e premium system does so. e TPMS monitors air pressure in the four road tires. e TPMS uses radio and sensor technology to monitor tire air pres- sure levels. Sensors, mounted to each road wheel as part of the valve stem, monitor tire pressure, air temperature inside tire, wheel acceleration and the sensor internal baery status for all four active road tires. e sensor will broadcast this informa- tion, along with a unique 32-bit ID, to a central receiver circuit located inside the wireless control module (WCM). In some model years, transponders are mounted in wheel housings (two in the front, and one in the rear) to locate all sensors in each wheel. If a warning or fault condition exists, the WCM will send a bus message request to illuminate the low pressure warning light, to sound a chime, and to display warning messages on the instrument cluster. e TPMS remains active even if no tire pressure related message is displayed. e sensors lay dormant (Park Mode), then wake and start transmiing (Drive Mode) within 10 minutes when the vehicle travels continuously at speeds over 15 mph (24 km/h). Once the wheels stop rotating for a period of approximately 20 minutes, the sensors shut down until again awakened. While in Park Mode, the sensors still transmit approximately once every 13 hours to let the receiver know air pressure status at that time or when a 1 psi (6.9 kPa) change is detected. If a system fault is detected, the indicator light will flash on/off for 60 seconds, once every 10 minutes. Tire pressure monitor warning indicators If the TPMS detects that the tire pres- sure in any road tire is beyond appropriate pressure specification, the TPMS will continuously illuminate an indicator lamp. e TPMS will request a chime once per ignition cycle for each "warning" or "fault" condition detected. A "warning" or "fault" condition will remain enabled until the problem causing the condition is corrected and removed/reset. If equipped, a graphic display of the pressure value(s) with the low tire(s) flashing will appear in the electronic vehicle information center (EVIC). If the warning light is lit continuously due to low pressure in one or more tires, adjust tire inflation to specification. e light will remain on until tire pressure is properly set. Aer adjusting air pressure in a tire, allow approximately two minutes for the message or indicator lamp to go out. If the warning light flashes for 75 seconds then remains ON continuously and a chime sounds, there is a problem in the TPMS. If equipped with the EVIC, in addition to a chime and an indicator lamp flashing, a "Check TPM System" text message will be displayed in the instrument cluster, and the tire pressure graphic display will have "- -" in place of the pressure value. After the flash sequence, the TPMS indicator lamp will remain illuminated. See the appropriate manufacturer service information. Reset procedures NOTE: If a tire pressure sensor has been replaced, the TPMS needs to relearn the tire pressure sensor IDs. If the warning light is lit continuously due to low pressure in one or more tires, adjust tire inflation to specification. e light will remain on until tire pressure is properly set. TPMS Quik-Link: 800-687-1557 ext. 19130 68