Installation Manual

Electrical & Electronic Application And Installation Manual
Production Release Version 1.0
Page 221
16.3.2.2 DEF System Purge Configuration
The DEF system purge is a mandatory feature enabled as default for both the
1204F and 1206F product ranges.
16.3.2.3 DEF System Purge Installation
The completion of the DEF purge cycle is dependent upon main power to the
engine and aftertreatment being maintained for the Max purge time shown in
table 16.7 To ensure that the operator is made aware that the system is still
electrically live after the ignition key switch has been turned OFF, it is
mandatory that a Wait To Disconnect indicator lamp is fitted next to the
machine battery isolator switch. For those machines using J1939 operator
displays a SCR system state message transmitted by the engine ECM may be
used to indicate to the operator that the system is still electrically live while the
system completes it purge cycle.
If a wired indicator lamp is to be used then depending upon the engine
product range a number of wiring options are available. These options are
shown in figure 16.12.
1204F & 1206F ECM Controlled Lamp Operation
1204F Wiring Without ECM Connection
1206F Wiring Without ECM Connection
Figure 16.12 DEF System Wait To Disconnect Indicator Wiring