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Home >> Chrysler >> 2011 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1599 (6.4L - DTCS P0563 To P1628 - 2500 Hd) >> DTC Troubleshooting >> P0685-ASD/Main Control Circuit >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes
(K51) ASD RELAY CONTROL CIRCUIT SHORTED TO GROUND
PCM POWER AND GROUND CIRCUITS
ASD RELAY
POWERTRAIN CONTROL MODULE (PCM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  . 

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