Case IH 2223 – ZDC: Transmission Lubrication Oil Pressure Sensor Short to Power

A short circuit between the sensor's feed line and the vehicle's 12-volt supply, which forces the voltage above normal limits.

• Steiger T4B
• Case IH Puma CVX
• Case IH Maxxum CVX

1. 1

   Inspect the wiring harness leading to the Transmission Lubrication Oil Pressure Sensor for pinched wires, damaged insulation, or areas exposed to moisture and road debris.

2. 2

   Examine the sensor and module connectors for corrosion or water intrusion.

3. 3

   Check the ZDC module for internal failure misinterpreting sensor feedback or commanding an over-voltage.

1. 1

   Repair or replace wiring harness

   Repair or replace any section of the wiring harness that has damaged insulation or is shorting to a 12V power source.

2. 2

   Clean or replace connectors

   Clean or replace corroded connectors.

3. 3

   Replace sensor

   Replace the Transmission Lubrication Oil Pressure Sensor if it has failed internally.

4. 4

   Replace or reprogram module

   Replace or reprogram the ZDC module if it is determined to have an internal micro-controller failure.