2018-1048

** CONFIDENTIAL **
Technical Service Bulletin 2018-1048
DATE:
November 13, 2018
TO:
E-ONE and Dealers
FROM:
Kevin Kearns, Customer Support Manager
SUBJECT:
DEF Sender Troubleshooting
E-ONE has identified that a large number of DEF tank senders that have been returned for
evaluation have been diagnosed as no fault found from the manufacturer. In an effort to minimize
this in the future, we are sending this bulletin along with troubleshooting steps for your
technicians to use when you receive customer complaints related to DEF tank gauge level issues.
Affected Products: E-ONE custom chassis with 2013 EPA and newer Cummins engines.
Summary of preliminary troubleshooting steps:
1) Locate 4 pin connector to DEF tank sensor (PD 81).
2) Check voltage between pins 3 and 4. Verify voltage is between 11.8 and 13.5 VDC. If out
of range, perform voltage drop test from pin 4 to battery positive and from pin 3 to
battery ground. If problem is found, repair as necessary. Re-check voltage between pins
3 and 4.
3) Verify the 1939 data bus (check between pins 1 and 2, connector PD 81), on the truck
harness side has 60 ohms. While performing this check make sure the power is off and no
power going to the VDR.
4) Check for active Cummins engine codes with Insite. If active codes are found refer to the
attached Shaw Development document, Cummins Insite .CSV Export Instructions. Follow
instructions to download. Contact James Venglar, (239) 405-6100 or Steven Gorecki, (239)
405-6193 at Shaw Development for instructions on sending the export data to them for
evaluation.
5) Ensure the heater control valve is installed properly. Direction of flow indicated on valve
body. See figure 1.
6) Ensure the red and blue coolant hoses are installed properly at the DEF sensor location.
See figure 2.
Figure 1
Red line from engine
coolant supply
Red line out to DEF
tank supply inlet
Figure 2
If you have any questions, please contact me at (352) 861-3361.
Regards
Kevin Kearns
Customer Support Manager