i08786721
DEF Control Module Power -
Test
This procedure covers the following diagnostic
codes:
Table 164
Diagnostic Trouble Codes for the DEF Control Module Power Supply
J1939 Code
PDL Code Code Description
(code descriptions may vary)
Comments
5966-5 3965-5 Aftertreatment #1 Diesel Exhaust Fluid Dosing
Control Unit : Current Below Normal
A low current condition has been detected on
the keyswitch circuit between the engine ECM
and the DCU.
5966-6 3965-6 Aftertreatment #1 Diesel Exhaust Fluid Dosing
Control Unit : Current Above Normal
A high current condition has been detected on
the keyswitch circuit between the engine ECM
and the DCU.
6309-5 3966-5 Aftertreatment #1 Diesel Exhaust Fluid Dosing
Control Unit (KSW sinking dout) : Current Below
Normal
A low current condition has been detected on
the keyswitch circuit between the engine ECM
and the DCU.
6309-6 3966-6 Aftertreatment #1 Diesel Exhaust Fluid Dosing
Control Unit (KSW sinking dout) : Current Above
Normal
A high current condition has been detected on
the keyswitch circuit between the engine ECM
and the DCU.
Illustration 100 g06206536
Schematic for the DCU electrical power supply circuit
Not all connectors are shown. Refer to the electrical schematic.
296 UENR4469-36
Circuit Tests
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