System View
SYSTEM SCHEMATICSSYSTEM SCHEMATICS:
CONTROL ALGORITHM FLOW CHART
The base control algorithm of the ITM ECM is defined by the following flowchart:
LOCK MODE DESCRIPTION
^ Based on a driver request for lock mode, the system will supply a fixed torque to the ITM-I clutch.
^ When the vehicle exceeds 30 KPH the system will begin to disable lock mode by ramping down the ITM clutch torque. When the vehicle exceeds 40 KPH the ITM clutch is reduced to its minimum torque value. Lock mode is re-enabled following the same speed-to-torque map.
^ Lock mode is activated based on part number.
^ Lock mode will override all other system requests except for during an ABS event. During an ABS event the ITM clutch is turned off.
^ If there is a speed sensor signal fault, the speeds are no longer considered reliable and lock mode will be disabled.