35
PTO Interface
UltraShift
®
PLUS
and FA - PTO Inputs and Configurations
Countershaft, Thru-Shaft®, and Split Shaft PTOs
In any case a PTO is used, regardless of PTO style, Eaton requires the OEM provide a “PTO active” input to the transmission ECU.
The vehicle interface harness shall be pre-populated at the ECU 38-way connector with wiring and a connector needed to connect
the PTO. This connector will contain the input and return wire necessary to support the input function.
Note:
Must use a dedicated return on pin 34, frame grounds are not acceptable.
Note:
Refer to Cable and Harness Construction section for correct wire and terminal pin sizes for communication and control
wires.
•
PTO input shall be a normally open switch.
•
The switch shall close to the PTO return line (pin 34) whenever the PTO is activated. This input activates the PTO mode
of the transmission. This feature uses pin 18 and 34 of the transmission connector, see illustration.
•
The input signal wire for the PTO shall be isolated from other PTO related circuits.
•
The ground connection shall be isolated from local power device ground returns.
•
Proper wiring ensures the clutch stays engaged during PTO operation and clutch engagement rate is slower.
24
29
30
15
16
26
20
32
33
19
7
3
8
9
1
2
6
11
12
4
5
22
21
38
36
37
13
14
35
10
17
23
F
r
o
n
t View
T
r
a
ns
mi
ss
io
n
ECU Co
nn
ecto
r
(Vehicle I
n
te
r
face)
31
25
28
27
18
Pin Side View
34
S
witch
34
18
G
r
o
un
d
