U110B JEEP – Lost Engine Coolant Message

U110B JEEP Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

U110B JEEP Possible Causes

Faulty Transmission Control Module (TCM),Transmission Control Module (TCM) harness is open or shorted,Transmission Control Module (TCM) circuit poor electrical connection

U110B JEEP Description

The Transmission Control Module (TCM) receives information from the Engine, Anti-Lock Brake System, and the Electronic Gear Shift control modules over the CAN C bus. The CAN C bus is a high speed communication bus that allows real time control capability between various controllers. Most messages are sent every 20 mSec, this means critical information can be shared between multiple controllers almost instantaneously. The CAN C bus is a two wire bus with a CAN (+) and a CAN (-) circuit. To reduce the potential of radio and other electrical noise interference, the CAN Bus circuit wiring is manufactured using a twisted pair configuration within the electrical wiring harness.