The Shift Lever Assembly mechanism as shown in
Figure 24 and Figure 25, also contains an electrical
Transmission Range Recognition Switch (TRRS) and
the Park/Lock Solenoid. The TRRS informs the TCM
of the shift lever position. The 1996 to 1999 models
are "hard wired" to the TCM. The 2000-Up models
have the TRRS signals sent to the TCM via the CAN
bus system and require the proper scanner to moniter
and test.
With the TRRS being an integral part of the gear
Shift Lever Assembly mechanism which is located on
the floor in the center console, rain water from an
open sun roof, a coffee or soda spill is all it takes to
damage this switch. The TRRS is a commonly failed
device that produces complaints such as delayed
engagements or no up-shifts. The no up-shift
complaint is at times, accompanied with the TRRS
switch manual low indicator light stuck on regardless
of the selector lever position.
ELECTRONIC COMPONENTS (CONT'D)
Transmission Range Recognition Switch (TRRS)
With the face plate removed, the TRRS circuit board
can be easily seen. This circuit board has attached to
it wires which run to a connector in the rear of the
assembly. Shown in Figure 26 is a wiring diagram
which could be used to assist in diagnosing the TRRS
from the TCM connector. However, should the TRRS
switch need to be replaced, the entire Shift Lever
Assembly must be purchased.
Measured with the TCM connector unplugged
and the ignition in the “ON” position.
Shifter
Position
Approximate Voltage at the
TCM Connector Pin No.
P
R
N
D
4
3
2
1
25
10
10
10
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
10
10
10
10
10
10
10
10
10
10
10
10
10
26 27 28
Hexadecimal Chart
1
1
2
2
3
4
1
6
2
8
7
7
8
9
6
10
4
25
10
26
27
28
29
30
23
5
24
9
5
3
Diagnostic (Output)
Kickdown Switch
TRRS
TRRS
TRRS
Connector
TCM
Connector
Power In
Ground
TRRS
TRRS
TRRS
TCM Power
TCM Ground
R/P Lock Solenoid
Passenger Side Fuse
and Relay Module Box
Note: This test applies only to 1996-1999 models.
2000-Up models require the proper scanner.
Figure 26
26
Copyright © 2009 ATSG
AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
WWW.ALL-TRANS.BY
