i06926399
Motorized Valve - Test
This procedure covers the following codes:
Table 195
Diagnostic Codes for the Motorized Valves
J1939
Code
PDL Code Code Description
(code descriptions may
vary)
Comments
649-5 3512-5 Engine Exhaust Back Pressure
Regulator Control Command :
Current Below Normal
The ECM detects the following conditions:
A low current condition in the output for the exhaust back pressure regulator
for 2 seconds
168 diagnostic codes are not active.
The ECM has been powered for at least 2 seconds.
If equipped, the warning lamp will come on. The ECM will log the diagnostic
code.
649-6 3512-6 Engine Exhaust Back Pressure
Regulator Control Command :
Current Above Normal
The ECM detects the following conditions:
A high current condition in the output for the exhaust back pressure regulator
for 2 seconds
The ECM has been powered for at least 2 seconds.
If equipped, the warning lamp will come on. The ECM will log the diagnostic
code.
649-7 E1263 (2) Engine Exhaust Back Pressure
Regulator Control Command :
Not Responding to Command
The ECM detects the following conditions:
The signal from the exhaust back pressure regulator position sensor indi-
cates that the valve is not in the desired position.
This diagnostic code can be caused by a loss of the 5 VDC supply to the ex-
haust back pressure regulator position sensor.
The ECM has been powered for at least 2 seconds.
If equipped, the warning lamp will come on. The ECM will log the diagnostic
code.
2791 -5 3405-5 Engine Exhaust Gas Recircula-
tion (EGR) Valve Control : Cur-
rent Below Normal
The ECM detects the following conditions:
A low current condition in the output for the NOx Reduction System (NRS)
valve (EGR valve) for 2 seconds
168 diagnostic codes are not active.
The ECM has been powered for at least 2 seconds.
If equipped, the warning lamp will come on. The ECM will log the diagnostic
code.
(continued)
UENR4469-36 355
Circuit Tests
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