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DIAGNOSTIC CODES
COMPONENT CONDITION SPN FMI
Checksum/CRC Error 19
Crankshaft Position
Sensor
Plausibility Fault
636
2
Abnormal Frequency
Or Pulse Width Or
Period
8
Camshaft Position
Sensor
Mechanical System
Not Responding Or
Out Of Adjustment
637
7
Abnormal Frequency
Or Pulse Width Or
Period
8
Injector 1 (MAG)
Voltage Below
Normal / Shorted To
Low Source / Driver
Circuit Grounded.
651
4
Current Below Normal
/ Open Circuit / Driver
Circuit Open /
Grounded
5
Injector 2 (PTO)
Voltage Above
Normal, Or Shorted
To High Source /
Driver Circuit Short to
B+
652
3
Voltage Below
Normal, Or Shorted
To Low Source /
Driver Circuit
Grounded
4
Current Below Normal
Or Open Circuit /
Driver Circuit Open /
Grounded
5
Starter Solenoid
Driver Circuit
Voltage Above
Normal, Or Shorted
To High Source
677
3
Voltage Below
Normal, Or Shorted
To Low Source
4
Current Below Normal
Or Open Circuit
5
166
TROUBLESHOOTING
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