OPERATIONThe Transmission Range Sensor (TRS) communicates shift lever position to the TCM as a combination of open and closed switches. Each shift lever position has an assigned combination of switch
states (open/closed) that the TCM receives from four sense circuits. The TCM interprets this information and determines the appropriate transmission gear position and shift schedule. There are many possible combinations of open and closed switches (codes). Seven of these possible codes are related to gear position and five are recognized as “between gear” codes.
This results in many codes which should never occur. These are called “invalid” codes. An invalid code will result in a DTC, and the TCM will then determine the shift lever position
based on pressure switch data. This allows reasonably normal transmission operation with a TRS failure.GEARC5C4C3C2C1
ParkCLOPOPCLCL
Temp 1CLOPOPCLOP
ReverseOPOPOPCLOP
Temp 2OPOPCLCLOP
Neutral 1OPOPCLCLCL
Neutral 2OPCLCLCLCL
Temp 3OPCLCLCLOP
DriveOPCLCLOPOP
Temp 4OPCLOPOPOP
Manual 2CLCLOPOPOP
Temp 5CLOPOPOPOP
Manual 1CLOPCLOPOP