4WD Indicator Light

WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

4WD - Illuminates continuously when the 4WD system is locked in 4WD due to its heat protection mode. In the locked mode, the vehicle resists turning and binds up when driven on dry pavement. To exit the locked mode, stop the vehicle and allow it to cool for 5 minutes with the engine running. When the 4WD indicator turns OFF, normal 4WD system function is restored.

4WD - Blinks continuously when the 4WD system is disabled due to its heat protection mode. To exit the disabled mode, stop the vehicle and allow it to cool for 5 minutes with the engine running. When the indicator turns OFF, normal 4WD system function is restored.

4WD - Blinks 3, 6, 8 or 10 times every minute when the 4WD system requires service. Use a scan tool to check for diagnostic trouble codes (DTCs). Refer to the FOUR-WHEEL DRIVE (4WD) CONTROL MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX in this article.

4WD INDICATOR LIGHT CAUSE TABLE

Blinks	Cause
3	Cluster is not receiving the 4WD indicator message from the 4WD control module
6	Invalid throttle position data received from the PCM
8	Invalid wheel speed data received from the ABS module
10	Active torque coupling circuit fault