Since the TREAD Act in 2007, Tire Pressure Monitoring Systems (TPMS) have become a standard safety feature in vehicles sold in the United States. If you own a 2019 Jeep Wrangler, you might be wondering about its TPMS and whether you need a scan tool, especially when replacing tires or sensors. Let’s delve into the specifics of the 2019 Jeep Wrangler TPMS and clarify if a scan tool is necessary for resets.
Understanding TPMS in Your 2019 Jeep Wrangler
The 2019 Jeep Wrangler, like many modern vehicles, utilizes a direct TPMS system. This means that each wheel is equipped with a TPMS sensor inside the tire. These sensors directly measure tire pressure and temperature, transmitting this data to your vehicle’s Engine Control Unit (ECU). If the system detects low tire pressure in one or more tires, it alerts you through a warning light on the dashboard. Some models with a high-line TPMS system even display the individual pressure of each tire on the dash, providing more detailed information.
When a TPMS sensor is replaced in your 2019 Jeep Wrangler, it’s generally recommended to perform a TPMS relearn procedure. This process ensures that the vehicle’s ECU recognizes the new sensor IDs. Without a proper relearn, the TPMS warning light might remain on, or the system may not function correctly.
TPMS Relearn Procedures for the 2019 Jeep Wrangler
For the 2019 Jeep Wrangler, there are two main types of TPMS relearn procedures: OBD relearn and Auto relearn.
OBD Relearn Procedure (2007-2017 models, check for 2019)
For certain years of the Jeep Wrangler, particularly models up to 2017, an OBD relearn procedure is available and may be required for 2019 models as well depending on the specific system implementation. This procedure typically requires a TPMS diagnostic scan tool along with an OBDII module. Here’s a general outline of the OBD relearn process:
- Preparation: Ensure all TPMS sensors are correctly installed and inflate tires to the recommended pressure listed on your vehicle’s placard.
- Tool Activation: Using a TPMS tool, like the VT56, VT55, or VT36, initiate the relearn process. Start by holding the tool against the sidewall of the left front tire, near the valve stem, and activate the sensor. Repeat this for the right front, right rear, and left rear tires in that order.
- OBDII Connection: Connect the OBD module to your vehicle’s Diagnostic Link Connector (DLC), usually located under the dashboard.
- Data Transfer: Turn the ignition ON (engine OFF). Press the OK button on the TPMS tool to transfer the sensor data to the vehicle’s ECU via the OBDII module.
- Completion: Disconnect the OBD module, turn the ignition OFF, then ON again. Drive the vehicle for at least 5 minutes at speeds above 28mph to finalize the relearn.
Auto Relearn Procedure (2007-2020 models)
The 2019 Jeep Wrangler also supports an auto relearn procedure. This method is generally simpler and does not always require a scan tool for initiation, although a TPMS activation tool can expedite the process.
- Preparation: As with OBD relearn, ensure sensors are correctly installed and tires are properly inflated.
- Sensor Activation (Optional but Recommended): Use a TPMS tool to activate each sensor. This step might not be strictly necessary for auto relearn to begin, but it can significantly speed up the process.
- Driving: Drive the vehicle for approximately 10-20 minutes at speeds above 15 mph. During this drive, the system should automatically recognize the new sensor IDs, and the TPMS light should turn off.
Do You Need a Scan Tool for a 2019 Jeep Wrangler TPMS Reset?
Yes, in many cases, a scan tool is highly recommended, and sometimes necessary, for a 2019 Jeep Wrangler TPMS reset, especially when performing an OBD relearn. While the auto relearn procedure might work without a scan tool, activating sensors with a tool ensures a quicker and more reliable relearn process.
A TPMS scan tool becomes essential in the following situations:
- OBD Relearn: If your 2019 Jeep Wrangler requires an OBD relearn (consult your owner’s manual or a professional to confirm), a scan tool with OBDII capability is necessary to transfer sensor data to the ECU.
- Troubleshooting TPMS Issues: When the TPMS warning light illuminates due to a system fault, a scan tool can read Diagnostic Trouble Codes (DTCs) to pinpoint the problem. This diagnostic capability is invaluable for efficient repairs.
- Sensor Activation for Auto Relearn: To expedite the auto relearn process and ensure sensors are actively transmitting, a TPMS activation tool is beneficial.
Tools like the ATEQ VT56, VT55, and VT36 are specifically designed for TPMS service, offering features ranging from basic sensor activation to advanced OBD relearn and DTC reading capabilities.
Troubleshooting TPMS System Faults
Sometimes, even with correctly installed sensors, you might encounter TPMS system faults. The TPMS warning light may flash for about 75 seconds and then stay solid, often accompanied by a chime. Common causes for system faults include:
- Signal Interference: Electronic devices or external radio frequencies can interfere with sensor signals.
- Aftermarket Window Tint: Some window tints contain metallic materials that block radio waves.
- Wheel Obstructions: Snow or ice accumulation around wheels or housings.
- Tire Chains: Using tire chains can sometimes interfere with sensor signals.
- Non-TPMS Wheels/Tires: Using wheels or tires not equipped with TPMS sensors.
In these cases, and when the TPMS light persists, using a scan tool to retrieve DTC codes can provide valuable insights for diagnosis and repair, ensuring your 2019 Jeep Wrangler’s TPMS functions correctly and keeps you safe on the road.
In conclusion, while a 2019 Jeep Wrangler might sometimes perform an auto relearn without a scan tool, having a TPMS scan tool is highly advantageous for sensor activation, OBD relearn procedures (if needed), and diagnosing TPMS system faults. For comprehensive TPMS maintenance and ensuring your system operates as intended, investing in or having access to a TPMS scan tool is a wise decision.
