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Home >> Jeep >> 2009 >> Grand Cherokee Limited, 3.0 M, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P0585 To P0674 - Diesel >> P0585-Speed Control Switch 1/2 Correlation >> Possible Causes

Possible Causes

Possible Causes 
(V71) S/C SWITCH NO. 1 SIGNAL CIRCUIT SHORTED TO VOLTAGE
(V72) S/C SWITCH NO. 2 SIGNAL CIRCUIT SHORTED TO VOLTAGE
(V71) S/C SWITCH NO. 1 SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
(V72) S/C SWITCH NO. 2 SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
(V937) S/C SWITCH GROUND CIRCUIT OPEN OR HIGH RESISTANCE
(V71) S/C SWITCH NO. 1 SIGNAL CIRCUIT SHORTED TO GROUND
(V72) S/C SWITCH NO. 2 SIGNAL CIRCUIT SHORTED TO GROUND
CLOCKSPRING
SPEED CONTROL SWITCH
ENGINE CONTROL MODULE (ECM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See  DTC-Based Diagnostics/MODULE, Engine Control (ECM) - Standard Procedure  .