New Holland ENG 3742 – EDC: EDC - Power stages, Injector: Too many SPI errors during MoCSOP execution.

This is an internal hardware or communication failure within the engine's computer. Specifically, the Serial Peripheral Interface (SPI) encountered too many communication errors while executing the Monitoring Concept Shut Off Path (MoCSOP) test for the fuel injector power stages. The ECU's internal safety monitoring has detected a fault in its own circuitry, meaning the module can no longer reliably control or monitor the fuel injectors.

• T4
• T5
• T6
• T7
• T8
• T9
• CR9090
• CX8080
• CX8090 Elevation (Tier 4A)
• Skid Steer Loaders (SSL)
• Compact Track Loaders (CTL)

1. 1

   Clear the code using the New Holland Electronic Service Tool (EST) or a compatible diagnostic tester to see if it was a transient software glitch

2. 2

   Inspect the main wiring harness connectors at the EDC/ECM for water intrusion, bent pins, or corrosion, which can cause data corruption

3. 3

   Verify stable battery voltage and clean ground connections to the engine block and EDC to rule out severe voltage drops triggering false internal errors

4. 4

   Confirm internal failure: if the error is still present after checking power and clearing, the ECU internal threshold has been breached and the module must be exchanged

1. 1

   Disconnect battery

   Disconnect the machine's battery (negative terminal first).

2. 2

   Disconnect wiring harness

   Disconnect the main wiring harness connectors from the EDC/ECM.

3. 3

   Remove faulty EDC/ECM

   Unbolt and remove the faulty EDC/ECM from its mounting bracket on the engine.

4. 4

   Install replacement EDC/ECM

   Install the replacement EDC/ECM and secure the mounting hardware.

5. 5

   Reconnect wiring and battery

   Reconnect the wiring harness connectors and the battery.

6. 6

   Program the new EDC/ECM

   Connect the New Holland EST laptop to flash the correct engine dataset, program the injector codes, and run the self-learning routines.