DIY Guide: Resetting Your 2007 Infiniti G35x TPMS with OBD2 Protocol

Are you experiencing a persistent TPMS (Tire Pressure Monitoring System) warning light on your 2007 Infiniti G35x after changing tires or wheels? Many Infiniti owners encounter this issue, especially after installing new aftermarket rims or swapping to winter tires. The good news is that you might be able to reset your TPMS system yourself without a trip to the dealership. This guide will walk you through a DIY procedure to relearn your tire pressure sensors using the OBD2 system, potentially saving you time and money. This method is particularly relevant for 2007 Infiniti G35x models and utilizes the standard OBD2 protocol for communication with your vehicle’s TPMS.

This guide is based on community experiences and aims to provide a practical solution for resetting your TPMS. Please follow these steps carefully to attempt a TPMS reset on your 2007 Infiniti G35x.

Step-by-Step Guide to Resetting Your 2007 Infiniti G35x TPMS

Before you begin, ensure you have the correct tire pressures set as a starting point. This procedure involves manipulating the TPMS system through a specific connector linked to your OBD2 wiring.

Step 1: Adjust Tire Pressures

It’s crucial to set your tire pressures to the exact values specified below. This step is essential for the TPMS relearn process to recognize each sensor at its designated location.

• Front Left (LH): 34 psi (240 kPa)
• Front Right (RH): 31 psi (220 kPa)
• Rear Right (RH): 29 psi (200 kPa)
• Rear Left (LH): 26 psi (180 kPa)

Use a reliable tire pressure gauge to ensure accuracy. These specific pressures are required to initiate the TPMS relearn sequence.

Step 2: Locate the TPMS Interface Connector

The TPMS interface plug is a white, two-pin female connector. It’s typically attached to the OBD II wire loom and located under the dashboard on the driver’s side, roughly above where your left knee would be while driving.

You may need to carefully inspect the wiring loom and possibly cut any tape securing the connector to the loom to access it. In some 2007 Infiniti G35x models, this connector might be found within the fuse box area near your left knee.

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The connector will have a single wire, usually yellow or white. This is the wire you will use to ground the system and initiate the TPMS relearn process.

Step 3: Prepare to Ground the Connector

Take a paper clip or a small length of wire and insert it into the connector where the single wire is located. The other end of the paper clip or wire will be used to make contact with a ground point in your vehicle. A safe and easily accessible ground point is often the steering column, which is metallic and reliably grounded. However, always ensure you are connecting to a true ground and not just any metal part.

Step 4: Initiate TPMS Relearn Mode

1. Key Position: Insert your key into the ignition and turn it to the “ON” position – the last click before starting the engine (KOEO – Key On, Engine Off). If your 2007 Infiniti G35x has a push-start button, press the start button twice without pressing the brake pedal.
2. Grounding Sequence: Within 10 seconds of turning the ignition to the “ON” position, take the free end of your paper clip or wire and tap it against a ground point (like the steering column) six times. Ensure each tap is a brief but definite contact with the ground.

Step 5: Verify TPMS Relearn Activation

If you have successfully completed step 4, the TPMS warning light on your dashboard should begin to flash slowly. This slow flashing indicates that you have entered the TPMS relearn mode.

• Fast Flashing: If the TPMS light flashes rapidly, it indicates that the relearn process has not been activated correctly. In this case, double-check your connections, turn the ignition off, and repeat steps 4 and 5.
• No Flashing: If the light remains solid or does not flash at all, re-examine your ground connection and ensure you are tapping the wire correctly within the 10-second window after turning the ignition ON.

Step 6: Complete the Relearn by Driving

Once the TPMS warning light is flashing slowly:

1. Start the Engine: With the TPMS light still flashing, start your Infiniti G35x. Do not turn the ignition off.
2. Drive: Begin driving your vehicle at a speed above 25 mph (approximately 40 km/h). Continue driving until the TPMS warning light turns off. This process might take up to 10 minutes of driving.

Step 7: Inflate Tires to Recommended Pressure

After the TPMS light goes out, it will likely reappear shortly due to the intentionally deflated tire pressures used for the relearn process. Inflate all tires to the recommended pressure specified on your tire placard (usually found on the driver’s side doorjamb).

Once you inflate the tires to the correct pressure, the TPMS warning light should turn off and remain off, indicating a successful TPMS reset.

Alternative Method (Engine Running)

Some users have reported success with a slightly modified method:

1. Start the Engine: Begin with the engine running.
2. Ground 5 Times: Ground the TPMS interface wire five times within 10 seconds.
3. Drive: Drive the car for approximately 15 minutes with the tire pressures still set to the relearn values.
4. TPMS Light Off: The TPMS light should turn off during your drive.
5. Inflate Tires: Re-inflate your tires to the correct pressures.

This alternative method might be worth trying if the initial procedure does not work for your 2007 Infiniti G35x.

Troubleshooting Tips

• Accurate Tire Pressures: Double-check that you have set the tire pressures exactly as specified in Step 1. Incorrect pressures can prevent the relearn process from initiating.
• Solid Ground Connection: Ensure you are using a reliable ground point for the paper clip or wire.
• Timing: The grounding sequence in Step 4 must be performed within 10 seconds of turning the ignition to the “ON” position.
• Connector Wire: Confirm you are tapping the correct wire within the TPMS interface connector.

Conclusion

Resetting your 2007 Infiniti G35x TPMS using this DIY method can save you a trip to the dealership and associated costs. By carefully following these steps and utilizing the OBD2 interface and TPMS PID (Parameter ID) communication, you can often successfully relearn your tire pressure sensors. Remember to always prioritize safety and consult a professional if you are uncomfortable performing these steps yourself or if the TPMS warning light persists after attempting this procedure. This guide is intended for informational purposes and is based on community-shared experiences for the 2007 Infiniti G35x model.