P0602

DTC P0602

Circuit Description
This diagnostic applies to internal microprocessor integrity conditions within the engine control module (ECM). This diagnostic also addresses if the ECM is not programmed.

Condition for Running the DTC
- The battery voltage is between 10-16 volts. (EEPROM malfunction only)
- The ignition switch is ON.

Condition for Setting the DTC
- The ECM detects a malfunction in its internal EEPROM.
OR
- The ECM detects that the fuel injector flow rate is not programmed.
OR
- The ECM detects an error in the programmed fuel injector flow rate.

Action Taken When the DTC Sets
- The ECM illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
- The ECM records the operating conditions at the time the diagnostic fails. The ECM stores this information in the Failure Records.
- The ECM limits fuel injection quantity within 70%.
- The ECM limits fuel rail pressure within 17400 psi (120 MPa).

Condition for Clearing the DTC
- A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
- Clear the MIL and the DTC with a scan tool.

DTC P0602