How does the transfer case module work on a truck?
How does the transfer case module work on a truck?
The transfer case module sends 8 volts to the switches, then monitors the return circuit to determine whether any of the switches is depressed. It can determine this because each switch has a different resistor in series with the circuit. Since both trucks have mode switch trouble codes, it seems logical to start there.
When did Chevrolet start using a transfer case?
Chevrolet started using this transfer case in 1999 models. The NP241 is a solid, reliable transfer case and superior to the NP203 it replaced. But as they age, the drivechain can stretch. Also, the synthetic pads on the shift forks wear, causing intermittent problems when the forks do not stay in their intended position.
Where is the encoder motor on a GM transfer case?
Access to datastream information for GM’s NVG 246 system makes most problems simple to locate and diagnose, as our case studies demonstrate. These systems also allow bidirectional control for many outputs. The encoder motor (arrow) is mounted on the front of the transfer case and is used to lock it into 4WD.
What kind of transfer case does a GMC Sierra use?
GMC Sierra 1500, 2500, and 3500, along with the Full Size Van the run was only 1998-2000. The NP261 Transfer case is used for more heavy duty applications, being reserved for mostly truck and van use. The NP261 transfer case was manufactured by New Venture Gear. The NP261 is chain driven, 4WD with manual shift.
Access to datastream information for GM’s NVG 246 system makes most problems simple to locate and diagnose, as our case studies demonstrate. These systems also allow bidirectional control for many outputs. The encoder motor (arrow) is mounted on the front of the transfer case and is used to lock it into 4WD.
What does DTCs stand for in GM transfer case?
DTCs will stay in memory for 100 key cycles. The dash buttons to the right of the air vent identify this system as an NVG 246 automatic two-speed, which means it has DTCs and scan tool capabilities. mode control is a set of normally open switches that vary the voltage supplied by the transfer case module when closed.
When to use transfer case shift control module?
If no buttons are pressed, and the transfer case shift control module detects a voltage level outside the possible range (approx. 0.5-1.0 volts) for longer than 5 minutes, the transfer case shift control module will set this DTC if a button is held down or sticks for a period longer than 5 min- utes.
