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Home >> Chrysler >> 2006 >> PT Cruiser Base, 2D Convertible, Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> 2.4L Engine - DTCS PO509 To P0850 >> Diagnosis And Testing >> P0645-A/C Clutch Relay Circuit >> Possible Causes

Possible Causes

Possible Causes 
(C28) A/C CLUTCH CONTROL CIRCUIT SHORTED TO BATTERY VOLTAGE
(C28) A/C CLUTCH CONTROL CIRCUIT OPEN
(C28) A/C CLUTCH CONTROL CIRCUIT SHORTED TO GROUND
TIPM
PCM

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

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