DTC P1781: 4X4L Switch Out Of Self-Test Range
WARNING: This page does not describe the selected car, but rather 33 other vehicles, including the 2010 Mercury Mountaineer, 2010 Mercury Milan, 2010 Mercury Mariner, 2010 Mercury Grand Marquis, and 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
DTC 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: |
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| Diagnostic Aids: | Verify the 4x4L switch cycles on/off. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | Refer to the Mechanical Shift Symptom Chart in the appropriate FOUR-WHEEL DRIVE SYSTEMS article to continue diagnosis. | ||