Hyundai Elantra (CN7): Tire Pressure Monitoring System / TPMS Sensor

Hyundai Elantra (CN7) 2021-2026 Service Manual / Suspension System / Tire Pressure Monitoring System / TPMS Sensor

Description and operation

Description

1.
Function
•
By detecting the pressure, temperature, acceleration, and battery condition, transmit information to ECU by a wireless RF.
•
Wheel location is recognized by comparing the Wheel Pulse of ECS (ABS) and RF send signal.
2.
Structure and features
•
There are four (4) sensors mounted in each wheel of the vehicle.
•
Frequency conversion type is FSK, and High Line is used in common.
3.
Mode
•
It consists of Shipping mode, stop mode, driving mode, and automatic learning mode.
Type
Function
Valve type
Snap in type [Rubber valve]
Screw
Screw T10 [Continental certification part]
MCU
ATIC 149 [Infineon]
Battery type
CR2032 type

Automatic Location Learning Perform
•
After stopping or parking for more than 19 minutes, automatic learning function in every driving position is performed.
•
The sensor is converted to Parking Mode when stopped or parked for more than 15 minutes. When acceleration of over 4g (15-20km/h) is detected in Parking Mode, it is converted to First Block Mode.

Repair procedures

Removal
1.
Remove the wheel and tire.
(Refer to Suspension System - "Wheel")
2.
Remove the screw with torx driver (A).
   
•
When installing the bead brake, make sure that it does not come in contact with the TPMS sensor.
•
Be careful not to damage the TPMS sensor when installing the bead brake near the TPMS sensor.

3.
Remove the sensor body (A) in the direction of the arrow.

4.
Use the valve mounting tool to pull out the valve until it is entirely out of the lower hole.
   
•
Do not reuse the snap-in type TPMS sensor.

   
•
Cut the rubber(A) at the bottom of valve with a knife.

5.
Apply lubricant to the surface of the new valve, and then mount it through the valve hole of the wheel.
Specified lubricants : soap water or YH100 (Lubricant for tire insert)
   
•
After applying the lubricant, it should not be longer than 5 minutes until the valve is mounted.
•
"(If the lubricant is applied for more than 5 minutesApply lubricant again)"

   
•
The TPMS sensor valve bottom is not properly sealed if it is not fully mounted on the wheel, as shown in the following figure:
•
Make sure that the valve body is pulled entirely through the hole.

6.
Apply soapy water or lubricant to the upper/lower bead section of the tire.

7.
To fit the bottom bead, position the sensor at the 5 o’clock position relative to the head on the tire changing machine

8.
Rotate the rim clockwise, and push down on the tire at the 3 o’clock position to fit bottom bead.
   
•
Place the tire on the rim so the bottom bead touches the edge of the rim after the sensor (6 o’clock).

9.
Push down on the tire at the 3 o’clock position and rotate the rim clockwise to fit the top bead.

10.
Inflate the tire until beads seat.

11.
Adjust the tire pressure according to the recommended tire pressure for the vehicle.
Specified tire pressure : Refer to "Specification"
12.
If the TPMS sensor malfunctions, you must perform TPMS sensor learning. Replace any faulty sensors and perform TPMS sensor learning.
Diagnostic Procedure Using a Diagnostic Instrument
The following section describes how to diagnose faults using a diagnostic instrument.
1.
Connect the diagnostic instrument to the self-diagnostic connector (16-pin) beneath the crash pad on the side of driver's seat, and then turn on the ignition to activate the diagnostic instrument.
2.
In the GDS Vehicle Type Selection menu, select "Vehicle Type" and "TPMS" System, and then opt for "OK."
[Register Sensor Method]

   
•
Check that Write ID and Read ID are the match.
•
After successfully registering the sensor, perform "Sensor Wireless Information" to confirm that the sensor operates properly.

[Sensor Status Method]

   
•
Each entry must be checked for normal operation of each sensor.
•
After replacing the tires or sensors, check for proper operation of sensor after sensor registration process.

    TPMS Inspection method

    Description and operation DescriptionTPMS Receiver : BCM(body control module) integrated management1.Early state• Platform information and sensor ID are not input.

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