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Home >> Chevrolet >> 2011 >> Suburban C2500 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Transfer Case - Mp 3010-NP0) >> Diagnostic Information and Procedures >> DTC B2725 >> Circuit/System Description

Circuit/System Description

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The transfer case shift control switch (TCSCS) has 3 modes. The transfer case shift control module (TCCM) supplies a regulated 5 V DC 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 NP0 transfer case has the following 3 modes:

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