Case IH 19293 – Vehicle Control Module (VCM) or Engine Control Module (ECM): Timeout Error of CAN-Receive-Frame

A communication network error indicating that a control module on the Controller Area Network (CAN) bus expected to receive a specific data frame within a programmed time window, but the message never arrived. This typically points to a physical interruption on the CAN bus (wiring issue), severe interference, or a module that has gone offline.

• Tier 4b
• Case IH Magnum
• Case IH Puma
• Case IH Optum
• Case IH Maxxum
• Case N-Series Loader Backhoes

1. 1

   Battery and Charging System Check: Verify the battery voltage is stable (12V-14V). Low or high voltage can cause power stage diagnosis to be disabled, leading to modules dropping offline and triggering CAN timeouts.

2. 2

   CAN Bus Resistance Test: Disconnect the negative battery cable. Using a multimeter, measure the resistance between the CAN High and CAN Low pins at the diagnostic port. A healthy CAN bus should read approximately 60 ohms. A reading of 120 ohms indicates an open circuit or a missing/failed terminating resistor.

3. 3

   Visual Harness Inspection: Inspect the main CAN bus wiring harness for chafing, pinched wires, or rodent damage, particularly where harnesses route near the engine block or articulation points.

4. 4

   Connector and Pin Inspection: Check the connectors at the VCM and ECM. Look for backed-out pins, corrosion, or moisture intrusion.

1. 1

   Isolate the Power

   Disconnect the negative battery terminal to prevent short circuits while working on the communication lines.

2. 2

   Clean Connectors

   If moisture or green corrosion is found in the VCM/ECM plugs or intermediate harness connectors, clean the pins thoroughly with electrical contact cleaner. Apply dielectric grease to the connector seals to prevent future moisture ingress.

3. 3

   Repair Wiring

   If the CAN High or CAN Low wires are chafed or broken, cut out the damaged section. Splice in new wire using OEM-approved methods (soldering and adhesive-lined heat shrink). You must maintain the standard twist rate of the CAN wires (typically 1 twist per inch) to prevent electromagnetic interference.

4. 4

   Replace Terminating Resistors

   If the CAN bus resistance test yielded 120 ohms, locate and replace the failed CAN terminating resistor on the affected network branch.

5. 5

   Clear Codes

   Reconnect the battery. Connect the CNH Electronic Service Tool (EST) or a compatible diagnostic scanner (e.g., Jaltest) to the diagnostic port. Clear the inactive 19293 fault code.

6. 6

   Test Operation

   Cycle the ignition key and start the machine. Monitor the live CAN bus data to ensure communication is restored and the timeout error does not return.