TRANSFER CASE - TOD 5D2-23 4. 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 TODTM System is responsible for distributing torque between the front and rear axles. The TOD monitors the propeller shaft speeds, operating range (High/Low), and ABS activity and then applies a calculated amount of torque to the front axle by Pulse Width Modulating the current applied to the EMC. 1. Touch-off Torque The minimum EMC Duty Cycle is based on the vehicle speed and throttle position.
The TOD receives the TPS signal from the following sources: On vehicles equipped with CAN, the TOD receives the TPS signal from the CAN bus. 2. When Slip Detection The TOD continuously monitors the front and rear propeller shaft speeds to detect wheel slip. 3. Wheel Slip Control When wheel slip is detected the TOD controls the EMC duty cycle as necessary until the wheel slip is reduced below the allowable limit. The EMC Duty Cycle will then be reduced to the Touch-Off value. 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 counteracting the ABS System. 5.
4L Strategy When the system is operating in 4L, the TOD continues TODTM (operation provided that the propeller shaft speed is below 175 rpm (5220 pulses/minute)). When the speed increases above 175 rpm, the EMC Duty Cycle is set to the maximum value (88 %) which applies the maximum available torque to the front axle. SSANGYONG Y200