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Home >> BMW >> 2000 >> 328i Standard >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Transmission - Overview >> Transmission Control System (GS 20) >> GS 20 Input Signals >> Range Selector Switch

Range Selector Switch

The switch is mounted inside the transmission main case on the driver's side. This location provides precise monitoring of the Manual valve position and is sheltered from the harsh environment under the vehicle external of the main case. Adjustment is not required. The range selector switch has 6 wires. The GS 20 provides the switch with 12 volts on one wire (pin 2 of connector X70004). Depending on the range selector position, the switch provides coded high signals over five wires to the GS 20. The addition of the fifth wire (pin 1) is new compared with previous four wire range selectors providing a redundant P/N signal circuit. See Fig 1 .

Fig 1: Range Selector Switch Operation
G00317132Courtesy of BMW OF NORTH AMERICA, INC.