Theory Of Operation
WARNING: This page is about a different car, the 2025 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
The Integrated Electric Pump (IEP) temperature signal circuit is monitored for short to ground and short to power or open circuit conditions. If the IEP detects a circuit fault, it sends a message to the TCM over the LIN bus. The IEP temperature sensor is integral to the IEP and not serviced separately.