Modern Tire Dealer

APR 2017

Magazine for the professional tire industry

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61 www.moderntiredealer.com GM/Cadillac Escalade Series: 2007-16 Two different kinds of TPMS sensors are used on these vehicles SUBJECT VEHICLES: 2007-2016 GM/Cadillac Escalade. RELEARN PROCEDURE? Yes. SPECIAL TOOLS NEEDED? A TPMS sensor activation tool ( J-46079) may be used in place of increasing/decreasing pressures to enable the sensor. T he tire pressure monitoring system (TPMS) on 2007 to 2016 GM/Cadillac Escalade Series system uses the remote control door lock receiver (RCDLR), body control module (BCM), four radio frequency (RF) transmiing pressure sensors, and the serial data circuit to perform the sensor learn mode functions. e sensor learn procedure must be performed any time the RCDLR is replaced, a sensor is replaced, or aer the vehicle's tires have been rotated. Once the learn mode has been enabled, each of the sensor's unique identification (ID) codes can be learned into the RCDLR's memory. When a sensor's ID has been learned, the RCDLR sends a serial data message to the BCM to sound a horn chirp. is verifies the sensor has transmied its ID, and the RCDLR has received and learned it. Each sensor takes a pressure measurement sample once every 30 seconds while in stationary mode. If the tire pressure increases or decreases by more than 1.6 psi (11 kPa) from the last pressure measurement, another measurement will occur immediately to verify the change in pressure. If a pressure change has indeed occurred, the sensor transmits in learn mode. W hen the RCDLR receives a learn mode transmis- sion while in learn mode, it will assign that sensor ID to the location on the vehicle relative to the order in which it was learned. e RCDLR must learn the sensor ID codes in the proper sequence in order to determine sensor location. e first learned ID is assigned to le front, the second to right front, the third to right rear and fourth to le rear. e TPMS will cancel the learn mode if more than two minutes have passed and no sensors have been learned, or if the system has been in learn mode for more than five minutes. If the learn mode is canceled before any sensor has been learned, the RCDLR will remember all current sensor IDs and their locations. As soon as the first sensor ID code is learned, all other IDs are erased from the RCDLR's memory. The updated tire pres- sures will not be displayed on the DIC until the RCDLR receives two more valid trans- missions from each sensor. Aer performing the reset procedure below, always test drive the vehicle above 25 mph for at least two minutes before viewing tire pressures on the DIC. When the vehicle is stationary, the sensors go into stationary mode. In this mode, the sensors transmit once every 60 minutes to minimize sensor baery consumption. As vehicle speed increases to 25 mph (40 km/h), the sensors go into drive mode, in which they transmit once every 60 seconds. NOTE: e sensor's pressure accuracy is about 2 psi (14 kPa) at temperatures from 14 to 158 degrees Fahrenheit (-10 to 70 degrees Celsius). TPMS Figure 1: Exploded view of a clamp-in style tire pressure sensor. Illustrations courtesy of General Motors Corp. Quik-Link: 800-687-1557 ext. 14130

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