Paccar Kenworth T170 Hybrid 2011, Builder'S Manual

Page: 156 / 179

Section 8
Electrical
8-28
12/11
All VCAN lines must conform to J1939-11 guidelines; this includes using a jacketed, shield-
ed, twisted pair of wires. Keep the VCAN lines away from high current, rapidly switching
loads and the wires connected to these devices. For more details about 1939-11 VCAN
specifications please refer to SAE J1939-11.
PTO
Hybrid trucks have the option of two different PTO operation modes; they can be outfitted with either an Electronic PTO or
a Mechanical PTO .
ePTO
EPTO uses the Hybrid Systems electric motor to turn the PTO gear in the transmission. A 3 way connector is provided on
the Transmission Harness to interface with the PTO. The connector provides the positive and negative signals to engage
the PTO and an interlock to insure the PTO is engaged . The interlock circuit is a ground signal . This is typically done with a
ball switch on the PTO . One side of the ball switch would be connected to ground and the other to Pin A .
ePTO 3 way connector
Pin A is for PTO interlock negative signal
Pin B is for PTO solenoid Neg
Pin C is for PTO solenoid Pos
FIGURE 8-21. ePTO Harness Location
mPTO
MPTO operates like a normal PTO with the exception of the use of a PTO interlock circuit . The interlock circuit is a ground
signal . This is typically done with a ball switch on the PTO . One side of the ball switch would be connected to ground and
the other to terminal P206 located LH side of the transmission on the hybrid transmission harness .
Note: