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TRANSFER CASE (TOD) 5D2-11 4. Electric Shift Default Mode If the motor fails to reach its destination, the TCCU will attempt the following (in order): a. The TCCU will wait 3 seconds then attempt the shift again. b. If the second attempt to reach the destination fails the TCCU will wait 3 seconds then attempt to rotate the motor back to the original position. If successful, all future shifts will be inhibited until the Ignition is cycled. c. If the attempt to return to the original position fails, the TCCU will wait 3 seconds then attempt to rotate the motor to the original position again. If the second attempt to return to the original position is successful, the d. If the second attempt to return to the original position fails the motor will be turned off, the “4WD CHECK” lamp will be illuminated, and all future shifts will be inhibited until the Ignition is cycled. TOD TM System Operation The TOD TM System is responsible for distributing torque between the front and rear axles. The TCCU monitors the propshaft speeds, operating range (High/Low), and ABS activity and then applies a calculated amount of torque to 1. Touch-off Torque The minimum EMC Duty Cycle is based on the vehicle speed and throttle position The TCCU receives the TPS signal from the following sources: On vehicles equipped with CAN, the TCCU receives the TPS signal from the CAN bus. 2. When Slip Detection The TCCU continuously monitors the front and rear propshaft speeds to detect wheel slip. 3. Wheel Slip Control When wheel slip is detected the TCCU controls the EMC duty cycle as necessary until the wheel slip is reduced 4. Brake/ABS Strategy When the ABS System is active, the EMC Duty Cycle is set to a fixed duty cycle (30%) to aid in braking without 5. 4L Strategy When the system is operating in 4L, the TCCU continues TOD TM (operation provided that the propshaft speed is below 175 rpm (5220 pulses/minute)). When the speed increases above 175 rpm, the EMC Duty Cycle is set to |