The ECM detects all of the following conditions:
- The ECM reads signal voltage that is below 0.2 VDC for one second.
- The ECM has been powered for at least three seconds.
- 262-03 "5 Volt Sensor Supply short to +batt" and 262-04 "5 Volt Sensor Supply short to ground" are not active.
System Response:
The ECM will set atmospheric pressure to a default value.
The ET will display "Short to Ground" for the atmospheric pressure on the ET status screen.
The ECM will generate a CID 274-FMI 04 diagnostic code on the Cat Data Link. The diagnostic code will be displayed on a diagnostic screen of the Electronic Technician (ET).
The ECM will generate a SPN 108-FMI 04 diagnostic code on the J1939 Data Link. The diagnostic code may be displayed on a display module for the J1939 data link.
The ECM will generate a 26 flash code that will be displayed on the diagnostic lamp.
- Low power
Further troubleshooting is required.
Test Step 1. Perform the following test: Engine Pressure Sensor Open or Short Circuit - Test
Results:
- OK - Stop.