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Home >> Chrysler >> 2008 >> Pacifica Limited, FWD >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P0643 To P1628 >> P0685-ASD-Main Control Circuit >> Possible Causes
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Possible Causes

Possible Causes 
INTERMITTENT DTC
FUSED B(+) CIRCUIT OPEN OR HIGH RESISTANCE
(K51) ASD RELAY CONTROL CIRCUIT SHORTED TO VOLTAGE
(K51) ASD RELAY CONTROL CIRCUIT SHORTED TO GROUND
(K51) ASD RELAY CONTROL CIRCUIT OPEN OR HIGH RESISTANCE
AUTO SHUTDOWN RELAY
POWERTRAIN CONTROL MODULE (PCM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.