DTC P0605 Internal Control Module Read Only Memory (ROM) Error: DTC Detecting Condition

DTC DETECTING CONDITION CHART

Item		Detecting Condition	Possible Cause
DTC Strategy	Case 1	ECM internal process (Level 2) monitoring	Poor connection or damaged harness Faulty ECM
	Case 2	Check RAM Area / Communication connections
	Case 3	ECM internal process (Level 3) monitoring
Enable Conditions		Ignition "ON"
Threshold Value	Case 1	Actual value is higher / lower than allowable range Too high engine speed (1760rpm) in case of ETC limp home Difference between actual torque and torque set point is higher than threshold
	Case 2	RAM/Checksum test failure.
	Case 3	RAM/ROM error on microcontroller checksum error Communication between main controller and monitoring unit error Calculation of process monitoring error
Diagnostic Time	Case 1	Approx. 520 msec.
	Case 2	Approx. 100 msec.
	Case 3	Immediate
Limp-Home	Case 1	Forced limited RPM mode : The ECM limits engine speed to 1500rpm Electrical check of the ETC system is prohibited
	Case 2
	Case 3	Forced engine shut down mode : The ECM shuts down the engine
MIL On Condition		Immediate