Transmission Range Sensor Description; Operation; Removal - Chrysler Vehicle User Manual

TJ
TRANSMISSION RANGE
SENSOR
DESCRIPTION
The Transmission Range Sensor (TRS) is mounted
to the top of the valve body inside the transmission
and can only be serviced by removing the valve body
assembly. The electrical connector extends through
the transmission case (Fig. 249).
Fig. 249 Valve Body Assembly
1 - SOLENOID/PRESSURE SWITCH ASSEMBLY
2 - TRS
3 - TRANSFER PLATE
4 - SEPARATOR PLATE
5 - VALVE BODY
The Transmission Range Sensor (TRS) has four
switch contacts that monitor shift lever position and
send the information to the PCM.

OPERATION

The Transmission Range Sensor (TRS) communi-
cates shift lever position (SLP) to the PCM as a com-
bination of open and closed switches. Each shift lever
position has an assigned combination of switch states
(open/closed) that the PCM receives from four sense
circuits. The PCM interprets this information and
determines the appropriate transmission gear posi-
tion and shift schedule.
AUTOMATIC TRANSMISSION - 42RLE
Since there are four switches, there are 16 possible
combinations of open and closed switches (codes).
Seven of these codes are related to gear position and
three are recognized as "between gear" codes. This
results in six codes which should never occur. These
are called "invalid" codes. An invalid code will result
in a DTC, and the PCM will then determine the shift
lever position based on pressure switch data. This
allows reasonably normal transmission operation
with a TRS failure.
TRS SWITCH STATES
SLP T42
P CL
R CL
N CL
D OP
2 OP
1 CL

REMOVAL

(1) Disconnect the TRS connector.
(2) Remove valve body assembly from vehicle.
(3) Remove the manual shaft seal (Fig. 250).
Fig. 250 Manual Shaft Seal - Typical
1 - SEAL
2 - MANUAL SHAFT
21 - 175
T41 T3
CL CL OP
OP OP OP
CL OP CL
OP OP CL
OP CL OP
OP CL CL
T1