(Table 217, contd)
Diagnostic Codes for the Solenoid Valves
J1939 Code PDL Code
Code Description
(code descriptions may
vary)
Comments
3363-5 3126-5
Aftertreatment #1 DEF Tank
Heater : Current Below Normal
The ECM detects the following conditions:
A low current condition in the output from the DCU to the solenoid in the cool-
ant diverter valve.
There are no active 168 diagnostic codes.
The warning lamp will come on. The diagnostic code will be logged.
3363-6 3126-6
Aftertreatment #1 DEF Tank
Heater : Current Above Normal
The ECM detects the following conditions:
A high current condition in the output from the DCU to the solenoid in the cool-
ant diverter valve.
There are no active 168 diagnostic codes.
The warning lamp will come on. The diagnostic code will be logged.
Follow the troubleshooting procedure to identify the root cause of the fault.
The following background information is related
to this procedure:
Coolant Diverter Valve
The coolant diverter valve controls the flow of coolant
to the heater in the Diesel Exhaust Fluid (DEF) tank.
When required, the valve is opened to allow hot
coolant to circulate through the DEF tank. This flow
allows the coolant to heat the DEF to a useable
temperature.
DEF Injector
The DEF injector controls the flow of DEF into the
exhaust stream in the Clean Emissions Module
(CEM). The DEF injector is controlled by the Dosing
Control Unit (DCU).
DEF Coolant Diverter Valve Solenoid Override
The override is used to check the solenoid and
diverter valve harness. This override will open the
coolant diverter valve, allowing coolant to flow
through the Pump and Electronics Unit (PEU) . This
test can be used to verify that the coolant diverter
valve is working correctly.
This override will only enable with the engine running
at idle prior to the DEF system priming to operating
pressure.
DEF Dosing Injector Override
This override allows the user to test the electrical
circuit for the DEF injector. The override commands
the DEF injector to open. This override only operates
when there is no engine speed.
404 UENR4469-36
Circuit Tests
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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