The Engine Control Module (ECM) detects the following conditions:
- The voltage for the injection actuation pressure circuit is greater than 4.8 VDC for more than 0.6 seconds.
- Cold mode is not active.
System Response:
The ECM will indicate an active code and the code will be logged. The check engine lamp will illuminate.
The ECM will default to 10 MPa (1450.4 psi). 10 MPa (1450.4 psi) will be displayed next to the status for "Desired Injection Actuation Pressure" and the status for "Actual Injection Actuation Pressure" on the Caterpillar Electronic Technician (Cat ET).
The injection actuation pressure control valve is set to 0.275 Amp. The current for the injection actuation pressure control valve is set to a fixed position. The fuel delivery is limited.
Note: The injection actuation pressure sensor will not go below 10 percent or above 90 percent of the reference voltage if the pressure exceeds the rated change or if the pressure is below the rated change.
The engine may emit white smoke on start-up because cold mode is not active.
Test Step 1. Perform the following diagnostic procedure: Engine Pressure Sensor Open or Short Circuit - Test
Results:
- OK - STOP