The Yamaha Grizzly 700 is a powerful and reliable all-terrain vehicle (ATV) known for its durability and off-road performance. One of its key safety features is the rollover sensor, which helps prevent accidents by shutting off the engine when the ATV tips over. While this sensor is essential for rider safety, it can sometimes cause unexpected issues, such as engine stalling or failure to restart.
In this topic, we’ll cover everything you need to know about the Yamaha Grizzly 700 rollover sensor, including its function, common problems, troubleshooting tips, and how to replace or bypass it if necessary.
What is the Yamaha Grizzly 700 Rollover Sensor?
The rollover sensor (Tilt Sensor or TORS – Tip-Over Relay Sensor) is designed to detect when the ATV tips beyond a safe angle. If the vehicle tilts too far, the sensor sends a signal to the Electronic Control Unit (ECU), which then shuts off the engine to prevent further movement. This feature helps protect both the rider and the ATV from damage.
Key Functions of the Rollover Sensor:
✅ Detects excessive tilt to prevent accidents
✅ Sends a signal to the ECU to shut off the engine when needed
✅ Automatically resets when the ATV is back in an upright position
Common Issues with the Rollover Sensor
Although the rollover sensor is designed to improve safety, it can sometimes cause issues. Some common problems include:
1. Engine Stalls Unexpectedly
-
If the sensor malfunctions or gets stuck, it may shut off the engine even when the ATV is on level ground.
-
Dirt, debris, or electrical connection issues can cause false signals.
2. ATV Won’t Start After Tipping Over
-
If the sensor remains engaged, the ECU won’t allow the engine to restart, even after returning the ATV to an upright position.
-
Resetting or bypassing the sensor can sometimes fix the issue.
3. Faulty Sensor Giving False Readings
-
Over time, the sensor may wear out or get damaged, leading to incorrect tilt detection.
-
Vibrations from rough terrain can loosen connections, causing intermittent failures.
How to Troubleshoot the Yamaha Grizzly 700 Rollover Sensor
If your ATV stalls unexpectedly or won’t start, follow these steps to diagnose and fix the problem:
Step 1: Check the Sensor’s Position
Locate the rollover sensor, typically found near the frame or under the seat.
Ensure it is securely mounted and hasn’t shifted due to vibration or impact.
If the sensor is tilted or loose, reposition it and test the ATV.
Step 2: Inspect Electrical Connections
Look for loose, corroded, or damaged wires.
Unplug and clean the connectors with electrical contact cleaner.
Reconnect and ensure the wires are firmly in place.
Step 3: Reset the Rollover Sensor
Turn the ignition off and let the ATV sit for a few minutes.
Rock the ATV gently side to side to ensure the sensor resets.
Restart the engine and check if the problem persists.
Step 4: Test the Sensor
Use a multimeter to check for continuity in the sensor’s wiring.
If the sensor is not sending the correct signals, it may need replacement.
How to Replace the Yamaha Grizzly 700 Rollover Sensor
If troubleshooting doesn’t fix the issue, replacing the sensor is the next step.
Tools Needed:
✔ Phillips screwdriver
✔ Socket wrench
✔ Replacement tilt sensor (OEM or compatible)
Steps to Replace the Sensor:
1️⃣ Locate the rollover sensor under the seat or near the frame.
2️⃣ Disconnect the wiring harness attached to the sensor.
3️⃣ Remove the old sensor by unscrewing its mounting bolts.
4️⃣ Install the new sensor, making sure it is in the correct orientation.
5️⃣ Reconnect the wiring harness and secure all connections.
6️⃣ Test the ATV by starting the engine and tilting the vehicle slightly.
Bypassing the Rollover Sensor: Is It Safe?
Some riders choose to bypass the rollover sensor to prevent stalling issues, especially in extreme off-road conditions. However, this can be dangerous because it removes an important safety feature.
How to Bypass the Sensor (For Emergency Use Only)
Warning: Bypassing the sensor should only be done temporarily in an emergency.
1️⃣ Disconnect the sensor’s wiring harness.
2️⃣ Find the two main wires in the connector.
3️⃣ Bridge the wires together using a small piece of wire or a jumper.
4️⃣ Tape the connection securely to prevent short circuits.
5️⃣ Test the ATV to ensure it runs properly.
If you bypass the sensor, remember to replace or repair it as soon as possible to restore proper safety functions.
Tips to Prevent Rollover Sensor Issues
✔ Regular Maintenance – Inspect the sensor and wiring periodically.
✔ Avoid Water & Mud Exposure – Moisture can damage electrical components.
✔ Secure All Connections – Vibrations can loosen wires, leading to failures.
✔ Use Quality Replacement Parts – OEM sensors work best for reliability.
The Yamaha Grizzly 700 rollover sensor is an essential safety component that helps protect riders by shutting off the engine if the ATV tips over. While it plays a crucial role, sensor malfunctions can cause stalling issues, preventing the ATV from running properly.
By understanding how the sensor works, troubleshooting problems, and replacing it when necessary, you can keep your Yamaha Grizzly 700 in top condition. If you’re considering bypassing the sensor, remember that it should only be a temporary solution in emergencies.
With proper maintenance and care, you can ensure that your ATV remains safe, reliable, and ready for any adventure.