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Home >> Jeep >> 2007 >> Commander Base, 4.7 P, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> DTCS P0581 To P0643 >> P0581-Speed Control Switch 1 Circuit High >> Possible Causes
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Possible Causes

Possible Causes 
(V371) S/C SWITCH NO. 1 SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
(V371) S/C SWITCH NO. 1 SIGNAL CIRCUIT OPEN
(V71) S/C SWITCH NO. 1 SIGNAL CIRCUIT OPEN
(V397) SWITCH RETURN CIRCUIT OPEN
(V937) SWITCH RETURN CIRCUIT OPEN
SCCM
SPEED CONTROL SWITCH
PCM

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .