Dodge RAM 1500 1998 Owner's Manual page 1967

21 - 264 AUTOMATIC TRANSMISSION - 48RE
TRANSMISSION RANGE SENSOR (Continued)
Indicated Gear Position
Mechanical State
P
R
N
D
2
1
DIAGNOSIS AND TESTING - TRANSMISSION
RANGE SENSOR (TRS)
NOTE: For all circuit identification in the following
steps, Refer to the appropriate Wiring Information.
(1) Raise vehicle on suitable hoist.
(2) Disconnect the vehicle's shift cable from the
manual lever.
(3) With the manual lever in the PARK position
(the PARK position is with the manual lever moved
to the full rearward position), measure the resistance
between the Park/Neutral Position Sense pin of the
TRS and the transmission case. The resistance
should be less than 5 ohms.
(4) With the manual lever in the NEUTRAL posi-
tion (the NEUTRAL position is with the manual
Electronic Display Electronic Display
(Ignition Unlocked) (Ignition On)
P
R
R
N
N
N
D
2
1
Transmission
Status
P Vehicle is in PARK
with the pawl
engaged.
The PARK pawl is
disengaged and the
vehicle is free to
roll, but REVERSE
is not engaged.
R The transmission is
hydraulically in
REVERSE.
The transmission is
transitioning
between REVERSE
and NEUTRAL.
N The vehicle is in
NEUTRAL.
The transmission is
transitioning
between NEUTRAL
and DRIVE, but is
not in DRIVE.
D The transmission is
hydraulically in
DRIVE.
2 The transmission is
hydraulically in
Manual SECOND.
1 The transmission is
hydraulically in
Manual FIRST.
lever moved two detents forward of the full rearward
position), measure the resistance between the Park/
Neutral Position Sense pin of the TRS and the trans-
mission case. The resistance should be less than 5
ohms.
(5) If the resistance is greater than 5 ohms in
either of the previous steps, check for a dirty contact
between the tip of the TRS rod and the valve body
manual lever. If the contact is OK, replace the TRS.
(6) With the manual lever in the REVERSE posi-
tion (the REVERSE position is with the manual lever
moved one detent forward of the full rearward posi-
tion), measure the resistance between the Fused
Ignition Switch Output and the Back-up Lamp feed
pins of the TRS. The resistance should be less than 5
ohms. If the resistance is greater than 5 ohms,
replace the TRS.
DR
Column Shifter
Position
In the PARK gate.
Between the PARK
and REVERSE
gates.
In the REVERSE
gate.
Between the
REVERSE and
NEUTRAL gates.
In the NEUTRAL
gate.
Between the
NEUTRAL and
DRIVE gates.
In the DRIVE gate,
In the SECOND
gate.
In the FIRST gate.