Cherokee 4WD L6-242 4.0L VIN S MFI (1992)
Control Module: Description and Operation
PURPOSE
The TCU determines shift and converter lockup timing based on signals from the sensors. The valve body solenoids are activated/deactivated
accordingly.
OPERATION
The TCU has a self diagnostic program. Component and circuitry malfunctions can be diagnosed with the DRB II tester. Once a malfunction is
noted and stored in TCU memory, it is retained even after the problem has been corrected. To cancel a stored malfunction, simply disconnect and
reconnect the "Trans." fuse in the TCU harness.
