1A
DTC P0601 / P0602 / P0607: Internal Control Module Memory Check Sum Error / Control Module Programming Error / Control Module Performance
System Description
Internal control module is installed in ECM.
DTC Detecting Condition and Trouble Area
NOTE:
For details of market code, refer to
Identification Plate.
DTC detecting conditionTrouble area
DTC P0601:
Data write error or check sum error
(1 driving cycle detection logic: M16A except for E10 model and J20A for all models)
(2 driving cycle detection logic: M16A for E10 model only)
DTC P0602:
Data programming error
(1 driving cycle detection logic)
DTC P0607:
Data programming error
(1 driving cycle detection logic) ECM
DTC Confirmation Procedure
1)Connect scan tool to DLC with ignition switch turned OFF.
2)Turn ON ignition switch and clear DTC, pending DTC and freeze frame data by using scan tool.
3)Start engine and run it at idle if possible.
4)Check DTC and pending DTC by using scan tool.
DTC Troubleshooting
NOTE:
Before this trouble shooting is performed, read the precautions for DTC troubleshooting referring to
Precautions for DTC Troubleshooting:M16A and J20A.
StepActionYesNo
1
DTC recheck
1)Clear DTC referring to
DTC Clearance:M16A and J20A.
2)Turn OFF ignition switch.
3)Turn ON ignition switch and check DTC.
Is DTC P0601 or P0607 still indicated?
Go to Step 2.
Intermittent trouble.
Check for intermittent referring to
Intermittent and Poor Connection Inspection.
2
ECM power and ground circuit check
1)Check that ECM power supply circuit and ECM ground circuit is in good condition referring to
ECM Power and Ground Circuit Check:M16A and J20A.
Are check results OK?
Substitute a known-good ECM and recheck.
Repair ECM power or ground circuit.
