DTC P0685 ECM/Pcm Power Relay Control Circuit /Open: DTC Detecting Condition

DTC DETECTING CONDITION

Item	Detecting Condition	Possible cause
DTC Strategy	Detects a short to ground, to battery or open circuit on Main Relay output Fault information provided by an output driver chip.	Poor Connection Open or short in control circuit. Main Relay PCM
Enable Conditions	Engine Running 11V ≤ Ignition Voltage ≤ 16V Enable Time delay ≥ 0.5sec.
Threshold value	Open or Short
Diagnosis Time	Continuous (More than 5sec. Failure for every 10 sec. test)
MIL On Condition	DTC only (NO MIL ON)