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

DTC DETECTING CONDITION AND POSSIBLE CAUSE REFERENCE

Item		Detecting Condition	Possible Cause
DTC Strategy	Case1	ECM internal process (Level 2) monitoring	Poor connection or damaged harness Faulty ECM
	Case2	Check RAM Area / Communication connections
	Case3	ECM internal process (Level 3) monitoring
Enable Conditions		Ignition "ON"
Threshold Value	Case1	Actual value is higher / lower than allowable range Too high engine speed (1760 RPM) in case of ETC limp home Difference between actual torque and torque set point is higher than threshold
	Case2	RAM/Checksum test failure.
	Case3	RAM/ROM error on microcontroller checksum error Communication between main controller and monitoring unit error Calculation of process monitoring error
Diagnostic Time	Case1	Approx. 520 m sec.
	Case2	Approx. 100 m sec.
	Case3	Immediate
Limp-Home	Case1	Forced limited RPM mode: The ECM limits engine speed to 1500 RPM Electrical check of the ETC system is prohibited
	Case2
	Case3	Forced engine shut down mode: The ECM shuts down the engine
MIL On Condition		Immediate