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P0605 Internal Control Module Read Only Memory(ROM) Error
AutoHex Online Help: Hyundai SONATA(NF) 2007
Component Location
General Description
A malfunction is detected by using a checksum technique for verifying data. The digital data is composed of zeros and ones. A checksum is the total of all ones in a string of data. By comparing the checksum value with a stored value, a malfunction can be detected.
DTC Description
The ECM monitors RAM areas and communication connections between microcontroller and output drivers and sets DTC P0605 if failure is detected.
DTC Detecting Condition
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(1760rpm) 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 msec. |
Case2 | ? Approx. 100 msec. |
Case3 | ? Immediate |
Limp-Home | Case1 | ? Forced limited RPM mode : The ECM limits engine speed to 1500rpm ? Electrical check of the ETC system is prohibited |
Case2 |
Case3 | ? Forced engine shut down mode : The ECM shuts down the engine |