Case IH 319 – ENGINE (ECM) CONTROLLER: Real Time Clock in controller has lost power

The real-time clock (a timing chip internal to the controller) is powered by the vehicle's unswitched battery supply. If battery power to the controller is lost for more than 5 seconds, the real-time clock loses its time and date accuracy. There is no effect on engine or machine performance, but logged data will not have accurate time and date stamps, and the amber maintenance/check engine lamp may illuminate.

• MX Magnum
• STX Steiger
• MX Series
• TG Series
• Magnum Series
• Magnum 275
• Magnum 310
• Puma Series
• STX Steiger Series
• STX440
• Axial-Flow 5130
• Axial-Flow 6130
• Axial-Flow 7130
• 527

1. 1

   Verify if the vehicle's main batteries were recently disconnected, replaced, or if the master disconnect switch was left off for more than 5 seconds

2. 2

   Inspect the unswitched battery supply circuit to the ECM for intact wiring and proper voltage

3. 3

   Check the harness backup battery voltage (if equipped) — the fault sets if voltage drops to 3.3 VDC or lower

4. 4

   Inspect the ECM and engine harness connector pins for corrosion, pushed-back pins, or moisture that could interrupt power

1. 1

   Restore Power

   Ensure the main vehicle batteries are fully charged and properly connected to the ECM.

2. 2

   Repair Wiring/Harness Battery

   If the harness backup battery is dead, or if the wiring/connectors between the battery and the ECM are damaged, repair the wiring or replace the harness battery.

3. 3

   Synchronize the Clock

   Connect a diagnostic PC using the OEM diagnostic software (such as Cummins INSITE or Case IH EST). Navigate to the 'Real Time Clock' feature and perform an automatic synchronization to match the ECM Real Time to the PC Date and Time.

4. 4

   Clear the Code

   Perform a key cycle (turn the keyswitch OFF, wait for the ECM to power down, then turn it back ON) to validate the repair and clear the active fault code.

5. 5

   Note on ECM Replacement

   The real-time clock is an internal chip and cannot be serviced separately. Because this fault does not affect engine performance, replacing the entire ECM is generally not recommended unless accurate time-stamping is strictly required for warranty or fleet tracking purposes.