DTC P1781: 4x4L Switch Out of Self-Test Range
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2005 Mercury Sable, 2005 Mercury Mountaineer, 2005 Mercury Monterey, 2005 Mercury Montego, and 2005 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.
P1781 - 4X4L SWITCH OUT OF SELF-TEST RANGE
| Description: | The 4x4L switch is an on/off switch. If the powertrain control module (PCM) does not sense low voltage when the switch is on, the DTC sets. | ||
| Possible Causes: |
|
||
| Diagnostic Aids: | Verify the 4x4L switch cycles on/off. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| Aviator, Expedition, Navigator, F-Super Duty, Excursion | Refer to FOUR-WHEEL DRIVE SYSTEMS . | ||
| All others | GO to TG: 4x4 Low Switch (4X4LSW) And Four Wheel Drive (4WD) Switch STEP TG1. | - | - |