P0603

DTC Code	DTC Name
P0603	Internal Control Module Keep Alive Memory (KAM) Error

DESCRIPTION

P0603
DTC Detection Drive Pattern	DTC Detection Condition	Trouble Area
Ignition switch ON	Either of following conditions is met: (1 trip detection logic) Injector compensation code has not been registered after install a new ECM. DPF Deterioration Record* has not been entered after install a new ECM.	Injector compensation code DPF Deterioration Record

*: DPF Deterioration Record means the ash accumulation volume in the DPF catalytic converter calculated by the ECM. If the ash accumulation volume in the DPF catalytic converter increases, the difference in pressure in front of and behind the DPF catalytic converter will increase. The difference in pressure in front of and behind the DPF catalytic converter is offset depending on the volume of accumulated ash.

Note

When a fuel injector is replaced, the new fuel injector compensation code must be input into the ECM. When the ECM is replaced, all of the existing fuel injector compensation codes must be input into the new ECM.
Fuel injector compensation codes are 12-digit, alphanumeric values printed on the head of each fuel injector. If an incorrect fuel injector compensation code is input into the ECM, the engine assembly may rattle or engine idling may become rough. In addition, engine failure may occur and the life of the engine may be shortened.

Tech Tips

When replacing the ECM with a new one, if the injector compensation codes are not entered, DTC P0603 will be stored.

When replacing the ECM with a new one, input all learning values codes into the new ECM as follows:
1. Prior to replacing the ECM, use the intelligent tester to save each learning values codes from the original ECM Click here.
2. After installing a new ECM, write the saved learning values codes into the new ECM using the tester Click here.
3. Turn the ignition switch off and turn the tester off.
4. Wait for at least 30 seconds.
5. Turn the ignition switch to ON and turn the tester on.
6. Clear DTC P0603 stored in the ECM using the tester Click here.
  Tech Tips
  - Each fuel injector has different fuel injection characteristics. In order to optimize the fuel injections, the ECM uses the compensation codes to balance the different fuel injections between each injector.
  - When you first turn ON the ignition switch after replacing the ECM or a fuel injector(s), DTC P0603 is stored. If the ECM was replaced, the compensation codes for the fuel injectors must be registered to the new ECM. Manually clear the DTC upon completion of compensation code registration. If a fuel injector was replaced, the compensation code for the new fuel injector will need to be registered in the ECM.
  - If the "Learning Values Save" or "Learning Values Write" function has failed, input manually the injection compensation codes and the vehicle mileage using the "Injector Compensation" and "Vehicle Mileage Write" functions by following the instructions shown on the intelligent tester display.
  - Additionally, when the DPF catalytic converter is replaced, DTC P0603 will not be output, but "DPF Deterioration Record Clear" must be performed using the intelligent tester.

INSPECTION PROCEDURE

PROCEDURE

PERFORM REGISTRATION (LEARNING VALUES SAVE AND WRITE)
1. Prior to replacing the ECM, use the intelligent tester to save each learning values codes from the original ECM Click here.
2. After installing a new ECM, write the saved learning values codes into the new ECM using the tester Click here.
  
  Tech Tips
  
  If the "Learning Values Save" or "Learning Values Write" function has failed, input manually the injection compensation codes and the vehicle mileage using the "Injector Compensation" Click here and "Vehicle Mileage Write" functions Click here by following the instructions shown on the intelligent tester display.
NEXT
CHECK INJECTOR COMPENSATION CODE
1. Confirm that all of the learning value codes are input correctly Click here.
NEXT
CHECK WHETHER DTC OUTPUT RECURS (DTC P0603)
1. Connect the intelligent tester to the DLC3.
2. Clear the DTCs Click here.
3. Turn the ignition switch off and wait for 30 seconds or more.
4. Turn the ignition switch to ON and wait for 1 second.
5. Confirm that the DTC is not output again.
NEXT

END

СИСТЕМА ECD, Diagnostic DTC:P0603