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Home >> Chrysler >> 2007 >> Pacifica Base, 4.0 X >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P0645 To P1653 >> P0688-ASD-Main Sense Circuit >> Possible Causes
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Possible Causes

Possible Causes 
INTERMITTENT DTC
FUSED B(+) CIRCUIT OPEN OR HIGH RESISTANCE
(F343) ASD RELAY OUTPUT CIRCUIT SHORTED TO VOLTAGE
(F343) ASD RELAY OUTPUT CIRCUIT SHORTED TO GROUND
(F343) ASD RELAY OUTPUT CIRCUIT OPEN OR HIGH RESISTANCE
AUTO SHUTDOWN RELAY
POWERTRAIN CONTROL MODULE (PCM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .