Grand Cherokee 2WD Limited V8-4.7L (2002)
mph). The spare tire sensor will broadcast once every hour. Each sensor's broadcast is uniquely coded so that the EVIC can determine location.
The individual tire pressures can be displayed graphically on the EVIC.
Training The EVIC
The EVIC can be trained to recognize the source locations of pressure sensor/transmitter signals. Use the following training procedure:
1. Locate "RETRAIN TIRE SENSORS" on the EVIC menu.
2. Press STEP button to select YES and MENU button to confirm.
When this mode is enabled by selecting "YES" the EVIC will initiate the training procedure.
3. The EVIC display will prompt the user to:
"TRAIN LEFT FRONT TIRE". At this point the user must set the left front tire sensor to learn mode by positioning a magnet (Relearn Magnet
special tool 8821) over the valve stem for at least 5 seconds. The Remote Tire Pressure Monitor (RTPM) in the front left tire will transmit a
message indicating to the EVIC that it is in learn mode. When the EVIC has received this message and is assured that it has learned an ID, the
EVIC will request a horn chirp via a bus message and then display the next train request. Note: There is a 60-second timer for learning the first
tire location and a 30-second timer between the remaining tires. If any of these timers expire the EVIC will abort the training procedure.
4. The EVIC will request the initiation of a training sequence for each tire, one-by-one in a clockwise direction around the vehicle (Left Front,
Right Front, Right Rear, Left Rear and Spare). The EVIC will allow 30 seconds (60 seconds for the first tire) from the beginning of the train
request display to the receipt of a unique learn ID message from the RTPM. If, during a training session, a 60 or 30 second timer expires
before a unique learn sensor ID is received or the vehicle is not in park, the EVIC will keep the previous set of trained IDs and will display
"TRAINING ABORTED" until a button is pressed. Any IDs learned during the current session will be discarded. The EVIC will not store one
ID for multiple locations.
5. Once all five tires are successfully trained, the previous set of stored IDs will be replaced by the new IDs, and the EVIC will display
"TRAINING COMPLETE" until a button is pressed.
If the vehicle is equipped with the HomeLink feature and a HomeLink button is pressed at any time during the training procedure, the EVIC
module will immediately exit the training procedure, discard any IDs learned in the current session and perform the HomeLink function. After the
button is released, the module will display "RETRAIN TIRE SENSORS? NO".
The training procedure can be stopped at any time by pressing the C/T, STEP RESET or MENU button. When any of these buttons are pressed the
EVIC will display "TRAINING ABORTED" until another button is pressed.
Once training is complete, the EVIC can determine when the spare wheel has been mounted on the vehicle. The spare wheel sensor/transmitter is
expected to transmit once per hour. If the sensor/transmitter ID for the spare wheel is received at a shorter interval, the EVIC will request a chime
and display "SPARE SWAP DETECTED" for five seconds.
Pressure Thresholds
The EVIC will monitor the tire pressure signals from the five tire sensor/transmitters and determine if any tire has gone below the Low Pressure
Threshold or raised above the High Pressure Threshold. Refer to the table.
Critical And Non-Critical Pressure Alerts
A critical alert will be triggered when a tire pressure has gone below or above a set threshold pressure. Depending on what the condition is, the
EVIC will request a chime and then display a LOW PRESSURE or HIGH PRESSURE message indicating the appropriate location.
The alert message will display for three seconds and then switch to the tire pressure trip screen. The tire pressure for the tire that has exceeded its
threshold will blink at one second intervals on the graphic display. The blinking tire pressure will continue for the rest of the ignition cycle or until
an EVIC button is pressed. If the display is removed without correcting the condition, it will reappear without a chime after 60 seconds to warn the
driver of the low/high pressure condition.
