Illustration 43 g03700612
(1) DEF tank header electrical connector
(2) DEF tank header
Table 49
Troubleshooting Test Steps Values Results
3. Check the Electrical Connection at the DEF Tank Header
A. Inspect electrical connector (1) to the DEF tank header. Refer
to Troubleshooting, “Electrical Connectors - Inspect”.
Check for corrosion or loose wires.
Electrical
connections
Result: The electrical connectors are free of corrosion and
are not loose.
Proceed to Test Step 4.
Result: The electrical connections are corroded and/or
loose.
Repair: Make the necessary repairs to the connectors.
Turn the keyswitch to the OFF position until the “Wait to
Disconnect” lamp switches off to allow the DEF pump to
purge, reset the code, and reset the Dosing Control Unit
(DCU).
Use the electronic service tool to perform the “Aftertreat-
ment System Functional Test” to ensure that the repair
eliminates the fault.
Repeat this procedure from Test Step 1.
(continued)
114 UENR4469-36
Symptom Troubleshooting
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