Hyundai Elantra: Tire Pressure Monitoring System / TPMS Receiver

Hyundai Elantra (CN7) 2021-2024 Service Manual / Suspension System / Tire Pressure Monitoring System / TPMS Receiver

Description and operation

Description

TPMS Receiver : BCM(body control module) integrated management

Early state

•	Platform information and sensor ID are not input.

Normal State

•	To detect tire air pressure and DTC, the receiver must be in normal operation.

•	The receiver can check the position and information of the sensor.

Operation

General Function

•	Auto-learn takes place only once per Ignition cycle.

•	After this process is successfully completed, it is input into four sensor ID storage devices.

•	Until the end of automatic learning, if there is a drop in air pressure and air leakage, the previously learned sensor and each wheel position are detected.

•	Preliminary tire expansion and DTC status are not indicated.

General Conditions to Learn New Sensors

•	Automatic learning works only when the speed is over 15.5 mph (25 kph).

•	Typical time at driving continuously over 15.5 mph(25 kph) to learn a new sensor is up to 10 minutes.

General Conditions to Un-Learn a sensor that is removed

•	It takes less than 10 minutes at 15.5 mph(20-30 kph).

•	It depends on the speed of the vehicle and the number of sensors input to the receiver.

Repair procedures

Replacement

[TPMS Receiver (Integrated Body Unit (IBU))]

1.	Turn the ignition switch OFF and disconnect the battery negative (-) cable.

2.	Remove the glove box. (Refer to Body - "Glove Box")

3.	Remove the IBU (A) after loosening the mounting nuts and bolt.

4.	Remove the IBU after disconnecting the connector.

5.	To install, reverse the removal procedures.

6.	learn by connecting diagnostic tool.

7.	Perform TPMS test to check for any abnormality.

Diagnosis procedure by using diagnostic device

The main contents of diagnostic method using diagnostic device are as follows:

1.	Connect self-diagnosis connector (16 pins) located in the lower driver side crash pad to self-diagnosis device, and then turn on the self-diagnosis device after key is ON.

2.	Select the "vehicle model" and "TPMS" on GDS vehicle selection screen, then select OK.

[Vehicle Name Writing Method]

[Wheel Sensor ID Writing Method]

Inspection

1.	Check the vehicle code, VIN, sensor ID storage and normal storage in the receiver.

2.	Check if the TPMS receiver [Integrated Body Unit (IBU)] status is normal.

3.	Check whether the TPMS warning light is off and DTC.

TPMS Sensor

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Tire Rotation

To equalize tread wear, HYUNDAI recommends that the tires be rotated according to the maintenance schedule or sooner if irregular wear develops.

During rotation, check the tires for correct balance.

When rotating tires, check for uneven wear and damage. Abnormal wear is usually caused by incorrect tire pressure, improper wheel alignment, out-ofbalance wheels, severe braking or severe cornering. Look for bumps or bulges in the tread or side of the tire. Replace the tire if you find any of these conditions. Replace the tire if fabric or cord is visible. After rotation, be sure to bring the front and rear tire pressures to specification and check lug nut tightness (proper torque is 79~94 lbf·ft [11~13 kgf·m]).