Installation Manual

Electrical & Electronic Application And Installation Manual
Production Release Version 1.0
Page 93
8.2 1206F Pump Electronics & Tank Unit (PETU)
This section provides connection details for all PETU components, which
require connection back to the engine ECM J1 Connector.
8.2.1 PETU System Architecture
The PETU (Pump, Electronics and Tank Unit) is a self-contained DEF storage
and controlled distribution unit. The unit consists of a PEU (Pump Electronics
Unit), Tank Header unit and a Tank. The electrical components mounted to
the PEU and the tank header are shown in figure 8.4.
Figure 8.4 PETU and DEF Tank Architecture
The PEU DCU controller is responsible for operation of the DEF injector, DEF
heated lines, DEF pump (for both fluid supply and purge cycles) and
processing the information supplied by the DEF level and quality sensors.
The DCU (DEF Control Unit) is powered by the engine ECM and uses two
CAN bus connections to communicate the status of the DEF system. CAN C
is a dedicated CAN bus for emissions control information (reserved for engine
and AT use only). CAN A however is available for communication of engine
and AT parameters to a customer’s machine controller or CAN display unit.
The DEF system can be supplied in a number of different configurations
including system voltage, DEF line length (pressurised, suction and return
lines), header height and with or without DEF tank. In all cases the supply of
the header unit, DEF lines, pump and electronic controls must be supplied by
Perkins. Table 8.3 below shows which sections of this chapter are applicable
for each of the available system configurations.
FILL ADAPTER & CAP
(cap will be BLUE)
TANK (varies
by customer)
DRA IN (varies
by customer)
QUA LITY
SENSOR
COOLANT DIVERTER
VA LVE
POWER RELAYS
TANK MA NIFOLD
ASSEMBLY
DEF HEATED HOSE
ASSEM BLIES
QUALITY SENSOR AN D
FLUID CONNECTION
MANIFOLD
CUST OMER
ELECTRICAL
CONNECTIONS
HEADER UNIT
BOSCH DCU
VLPM