P1781 - 4X4L Switch Out Of Self-Test Range
WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2004 Mercury Sable, 2004 Mercury Mountaineer, 2004 Mercury Monterey, 2004 Mercury Marauder, and 2004 Mercury Grand Marquis. 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 PCM does not sense low voltage when the switch is on, the DTC sets. | ||
| Possible Causes: |
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| 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 | Go to the appropriate FOUR-WHEEL DRIVE SYSTEMS article. | - | - |
| All others | GO to TG: 4x4 Low Switch (4X4LSW) And Four Wheel Drive (4WD) Switch STEP 1 | - | - |