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Circuit/System Description

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The active transfer case mode switch circuit consists of 5 modes. The transfer case shift control module (TCCM) supplies a regulated 5 volts to the switch through the 5-volt reference circuit. The current travels through the specific resistor of the currently selected mode - each mode has its own resistor. The current is then returned to the TCCM through the switch signal circuit.

The TCCM continuously monitors the switch signal circuit to determine whether a mode change has been requested by the driver.

The NQH transfer case has the following 5 modes:

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