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Home >> Chrysler >> 2009 >> 300 Signature Series >> Repair and Diagnosis >> External Pages >> Different car >> Section 360 (DTCS B2346 To U0019 (TIPM)) >> P0646-A/C Clutch Control Circuit Low - Diesel >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2010 Dodge Charger and 2010 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes 
(C13) A/C CLUTCH RELAY CONTROL CIRCUIT SHORTED TO GROUND
(C13) A/C CLUTCH RELAY CONTROL CIRCUIT OPEN OR HIGH RESISTANCE
A/C CLUTCH RELAY
ENGINE CONTROL MODULE (ECM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. 

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