Detroit GHG17 Diesel Exhaust Fluid (DEF) Quantity Test will check that the correct amount of DEF fluid is delivered in a certain period of time. A fault code will normally accompany this procedure.
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Note : Using Detroit DiagnosticLink 8.19:
A properly operating system will deliver between 108 and 132mL of DEF once the test has completed.
New doser bolts and gasket are required after running this procedure.
Test as follows:
1 Remove the vehicle side fairing to gain better access to the dosing unit.
2 Remove the three bolts securing the DEF dosing unit to the mounting plate and discard bolts. Do not disconnect the DEF lines or electrical connector.
3 Use the graduated cylinder from DEF kit W060589001900 to measure the DEF dispensed during the test.
4 Place the doser on top of the graduated cylinder with the nozzle facing downward into the cylinder.
5 Turn the ignition ON (key ON, engine OFF).
6 Connect to DiagnosticLink
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