Case IH 3008 (DTC 2213) - ECU – Engine Control Unit (ECU) / ECU A-095: Engine coolant temperature sensor voltage is lower than expected

The engine's coolant temperature sensor is a Negative Temperature Coefficient (NTC) thermistor. The control module monitors the analog input voltage from this sensor. A "lower than expected" voltage typically means the circuit is experiencing a short to a low source (ground) or the sensor's internal resistance has dropped out of the calibrated range.

• MAXXUM T4E
• 240 Series Axial-Flow (7240, 8240, 9240)
• 140 Series
• 7010
• 7120
• 8010
• 8120
• 9010
• AFX8010
• Magnum 180
• Magnum 200
• Magnum 220
• Magnum 235
• Magnum 240
• Magnum 250
• Magnum 260
• Magnum 280
• Magnum 290
• Magnum 310
• Magnum 340
• Magnum 370
• Magnum 380
• Puma 150
• Puma 165
• Puma 185
• Puma 200
• Puma 220
• Steiger 350
• Steiger 370
• Steiger 380
• Steiger 400
• Steiger 420
• Steiger 435
• Steiger 450
• Steiger 470
• Steiger 485
• Steiger 500
• Steiger 540
• Steiger 550
• Steiger 580
• Steiger 620
• Quadtrac 350
• Quadtrac 370
• Quadtrac 380
• Quadtrac 400
• Quadtrac 420
• Quadtrac 435
• Quadtrac 450
• Quadtrac 470
• Quadtrac 485
• Quadtrac 500
• Quadtrac 540
• Quadtrac 550
• Quadtrac 580
• Quadtrac 620
• Maxxum 115
• Maxxum 125
• Maxxum 135
• Maxxum 145
• Maxxum 150
• Farmall 85C
• Farmall 95C
• Farmall 105C
• Farmall 105U
• Farmall 110A
• Farmall 110U
• Farmall 115C
• Farmall 115U
• Farmall 120A
• Farmall 120U
• Farmall 130A
• Farmall 140A
• Patriot 4440

1. 1

   Perform a sensor resistance test on the Coolant Temperature Sensor (B-016) using a multimeter to verify it reads between 332 Ω and 10.149K Ω (at -10 °C to 80 °C).

2. 2

   Inspect the engine plug connector (X-917, pin 39) and wiring harness for corrosion, moisture, backed-out pins, or a short circuit to ground.

3. 3

   Check system voltage to ensure the charging system is operating correctly and no faulty external power supplies are causing voltage irregularities.

4. 4

   Verify the Central Control Unit (CCU) or Universal Control Module (UCM) is not faulty and misinterpreting sensor data.

1. 1

   Power Down

   Turn off the machine and disconnect the battery to protect the ECU from voltage spikes during testing.

2. 2

   Locate the Sensor

   Find the engine coolant temperature sensor, typically located on the engine block near the thermostat housing.

3. 3

   Inspect the Connector

   Unplug the sensor. Inspect both the sensor terminals and the wiring harness connector for damage or coolant intrusion.

4. 4

   Test the Circuit

   Using a digital multimeter, check the wiring harness for continuity back to the ECU and ensure there is no short to ground.

5. 5

   Test/Replace the Sensor

   Measure the resistance across the sensor pins. If the resistance falls outside the 332 Ω - 10.149K Ω range (depending on ambient temperature), the sensor is defective.

6. 6

   Installation

   If replacing, partially drain the coolant to prevent spillage. Remove the old sensor, install the new OEM sensor, and torque to manufacturer specifications. Reconnect the wiring harness.

7. 7

   Clear Codes

   Reconnect the battery, turn the key to the ON position, and use a diagnostic tool to clear DTC 2213 (3008). Start the engine and verify that the temperature gauge reads accurately and the code does not return.