Seeing the 4WD light stuck on in your Nissan Armada can be concerning. This indicator light turning on typically means that there is a problem with the four-wheel drive system. When the 4WD light stays illuminated even when driving in two-wheel drive mode, it usually signals an issue that needs diagnosing and repairing.
In this troubleshooting guide, we will cover the common problems that can cause the 4WD light to remain on in your Nissan Armada. We will provide steps to diagnose the specific issue based on the symptoms that are present.
Table of Contents
Common Problems That Can Cause The 4WD Light To Illuminate In Your Nissan Armada
Faulty 4WD switch
- The 4WD switch located on the dashboard controls the electronic engagement of the transfer case to shift between 2WD and 4WD modes.
- If this switch is out of function, it can cause the 4WD light to remain on constantly.
Transfer case motor issue
- Within the transfer case, an electric motor controls the mechanism that shifts the vehicle in and out of 4WD.
- If this motor malfunctions or doesn’t disengage the transfer case properly, it can illuminate the 4WD indicator frequently.
Transfer case control module failure
- The transfer case control module is the computer that operates the 4WD system electronics.
- If this module has any internal faults or programming issues, it can mistakenly command the 4WD light to turn on constantly.
Encoder motor malfunction
- A small encoder motor provides the position feedback data to the transfer case control module.
- If this encoder motor fails, the module may default to keep on illuminating the 4WD light.
Low transmission fluid
- Low fluid levels in the transmission can also cause activation of the 4WD light and other shifting issues.
Faulty wheel speed sensors
- Incorrect data from malfunctioning front or rear wheel speed sensors can confuse the 4WD system electronics by leading to false light activation.
Low tire pressure
- As the final cause, extreme tire pressure differences between the tires can also trigger the 4WD light to illuminate.
Potential Solutions For You To Take When The 4WD Light Stays On In Your Nissan Armada
- Performing a complete reset of the 4WD system electronics can clear any erroneous faulty codes that are stuck.
- Inspect the fuse box in your Nissan Armada and replace any blown fuses that coordinate’s the 4WD control module, switch, motors, sensors, etc.
- Use a multimeter to check for continuity and proper voltage at the 4WD switch wiring harness.
- Remove and test the electric shift motor on the transfer case.
- Use an OBD-II scanner to pull any 4WD-related faulty codes that are onboard in the transfer case module.
- Check the front driveshaft and differential for any binding or damage.
- If all diagnostics points to a bad transfer case control module, replacement of the TCM is ideal to overcome this issue.
FAQs About Nissan Armada 4WD Light Stays On
Q: Is it safe to drive when the 4WD light is on?
A: It is generally not recommended to drive for a long distance when the 4WD light is on. This indicates a problem with the 4WD system that needs diagnosis and repairs as soon as possible.
Q: Is there a way to override or turn off the stuck 4WD light?
A: There is no straightforward way to deactivate the 4WD indicator light without addressing the default problem.