Case IH 3533 – Engine Controller (Engine ECU): CAN Message timeout Nox (from Nox Sensor) - CAN timeout

The control module has lost communication with the Nitrogen Oxide (NOx) sensor over the Controller Area Network (CAN) bus. The sensor is failing to send its data messages to the computer within the expected timeframe, which usually points to a severed connection, a wiring issue, or a completely failed sensor module.

• Magnum 180
• Magnum 190
• Magnum 210
• Magnum 225
• Magnum 235
• Magnum 240
• Magnum 250
• Magnum 260
• Magnum 280
• Magnum 290
• Magnum 310
• Magnum 315
• Magnum 340
• Magnum 370
• Magnum 380
• Steiger 4WD 350
• Steiger 4WD 370
• Steiger 4WD 400
• Steiger 4WD 420
• Steiger 4WD 450
• Steiger 4WD 470
• Steiger 4WD 500
• Steiger 4WD 540
• Steiger 4WD 550
• Steiger 4WD 580
• Steiger 4WD 600
• Steiger 4WD 620
• Quadtrac 370 to 600
• Puma 150
• Puma 165
• Puma 185
• Puma 200
• Puma 220
• Maxxum 115 to 150
• Farmall 110A to 140A
• 5130
• 6130
• 7130
• 7230
• 8230
• 9230
• Titan 3030
• Titan 3530
• Titan 4030
• Titan 4530
• Titan 2240
• Titan 4430

1. 1

   Scan for related codes using a diagnostic tool to check for accompanying codes that might indicate a specific electrical fault (e.g., 3529 for Open Load or 3530 for Short Circuit).

2. 2

   Inspect the wiring harness leading to the NOx sensor for physical damage, melting from exhaust heat, or chafing.

3. 3

   Disconnect the NOx sensor and inspect the pins for corrosion, moisture, or loose connections.

4. 4

   Verify the sensor is receiving proper voltage and ground, and check the CAN High and CAN Low communication lines for continuity back to the Engine ECU.

1. 1

   Ensure the machine is turned off and the exhaust system has completely cooled down.

2. 2

   Disconnect the electrical connector from the faulty NOx sensor.

3. 3

   Unscrew the NOx sensor probe from the exhaust/SCR system.

4. 4

   Install the new direct-replacement NOx sensor and tighten it to OEM specifications.

5. 5

   Reconnect the electrical harness.

6. 6

   Connect a diagnostic tool (such as Jaltest or Case IH Electronic Service Tool) to the machine and clear the error codes.

   The system requires an 'error cleaning' reset after a new NOx sensor is fitted to extinguish the SCR Failure warning message and comply with emissions parameters.