Case IH 282 – Engine Control Module (ECM): Rear Pumping element is failed

The Engine Control Module (ECM) has detected a mechanical or electrical failure in the rear pumping element of the fuel injection pump (Cummins Accumulator Pump System (CAPS)). When this code is active, the engine may experience a power derate, a rough idle/misfire, hard starting, or white smoke.

• MX Magnum
• STX Steiger
• Magnum MX180
• Magnum MX200
• Magnum MX220
• Magnum MX240
• Magnum MX255
• Magnum MX270
• Magnum MX285
• Steiger STX275
• Steiger STX325
• Combine 2366
• Combine 2377
• Combine 2388
• Combine 2577
• Combine 2588
• Patriot SPX4410
• Patriot 4420

1. 1

   Verify low-pressure fuel supply: check for algae or contamination in the tanks, replace fuel filters, and verify the electric lift pump (transfer pump) is functioning properly.

2. 2

   Test the control valve solenoids (stators) on top of the accumulator by electronically cutting out the rear solenoid using a diagnostic tool to see if the engine idle smooths out.

3. 3

   Inspect the transient suppressor diode, which protects the CAPS pump's electronics from voltage spikes.

4. 4

   Check for accompanying codes such as 273/274 (Rear Pumping Valve Circuit) or 328 (Rear Pumping Element) to further confirm a failure in the rear section.

1. 1

   Disconnect Power

   Disconnect the positive and negative battery terminals to protect the ECM and machine electronics.

2. 2

   Clean the Area

   Thoroughly wash the engine area around the CAPS pump to prevent dirt from entering the open fuel lines.

3. 3

   Remove Lines and Harnesses

   Disconnect the electrical harness connectors from the CAPS pump. Remove the high-pressure fuel lines and immediately cap all open fittings to prevent contamination.

4. 4

   Remove the CAPS Pump

   Unbolt and remove the faulty CAPS pump from the engine gear housing.

5. 5

   Install the Remanufactured Pump

   Mount the new/remanufactured CAPS pump to the engine, ensuring the gear timing is correct per the OEM service manual.

6. 6

   Replace the Transient Suppressor

   You MUST install a new transient suppressor when replacing the CAPS pump. Failure to replace this component will void the warranty on the new pump and risk immediate electrical failure.

7. 7

   Reassembly

   Reconnect all high-pressure fuel lines and electrical connectors. Reconnect the battery terminals.

8. 8

   Prime and Clear

   Prime the fuel system by cycling the key to activate the lift pump. Start the engine, check for leaks, and use a diagnostic tool to clear the inactive fault code 282.