Installation Manual
Electrical & Electronic Application And Installation Manual
Production Release Version 1.0
Page 225
When implementing SPN 4332 any message state other than 0111 means
DEF system is still electrically live. Once 0111 is received then the system is
in shutdown mode.
For more information on the format of PGN 61475 please refer to section 19.0
of this document.
16.3.3 DEF Thaw
16.3.3.1 DEF Thaw Operation
DEF becomes a solid at temperatures of -11DegC and below. In order for
engine out NOx levels to be controlled in cold ambient a DEF system heating
or thaw strategy is used. The thaw strategy is an automatic strategy that uses
information from various system temperature sensors. The System thaw
strategy is an engine running strategy only, using both electrical heating for
DEF lines and coolant heating for tank thaw.
16.3.3.2 DEF System Thaw Configuration
No configuration is required for the DEF thaw strategy to operate correctly.
16.3.3.3 DEF System Thaw Installation
As described in section 4.2 the DEF system requires an electrical current in
order for the heating system to operate correctly. These Electrical currents
may be required to thaw the system in cold ambient in addition to the current
required to run the engine ECM and the machine system. For this reason it is
important that an assessment of the engine low idle current demand is made
to ensure that the chosen alternator specification can meet the total system
demand.
All electrical connections required for correct system operation are shown in
sections 7, 8 and 9 of this document.
16.3.4 Operator Indicators and Displays
The table below provides a complete list of the available DEF system operator
indicators including J1939 Parameters where applicable. Please see section
13 of this document for the complete list of mandatory indicators required for
all Tier 4 Final/Stage IV products.
Indicator
ECM
Output
J1939
PGN
J1939
SPN
Mandatory
Product
Emissions System
Failure
40 65226 1213 Yes All
Emissions System
Failure Flash
N/A 65226 3038 Yes All
Wait To
Disconnect
Indicator
24 61475 4332 Yes All
DES Indicator* 48 64914 3543 Recommended 1206F Only
Low DEF Level 39 65110 5245 Yes All
Table 16.9 DEF and AT system Indicators