1. DTC P0601 description
This diagnosis applies to the microprocessor inside the ECM.
2. Condition for setting DTC P0601
Condition for setting the DTC
- The ECM detects that the calculated checksum does not match the checksum registered in the ROM.
3. Action taken when DTC P0601 sets
- Euro4: The ECM illuminates the MIL. Refer to Action taken when DTC sets - Type A (Euro4).
- Except Euro4: The ECM illuminates the check engine warning light. Refer to Action taken when DTC sets - Type A (Except Euro4).
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without DPD) DTC type definitions".
- The ECM limits the fuel injection quantity.
- The ECM stops the engine.
- The ECM inhibits pre-injection.
- The ECM limits the fuel rail pressure.
- The ECM inhibits the cruise control.
4. Condition for clearing DTC P0601
- Euro4: Refer to Condition for clearing the MIL/DTC - Type A or Type B (Euro4).
- Except Euro4: Refer to Condition for clearing the check engine warning light/DTC - Type A or Type B (Except Euro4).
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without DPD) DTC type definitions".