Table 190
Diagnostic Trouble Codes for Injector Solenoid
J1939 Code PDL Code
Code Description
(code descriptions may
vary)
Comments
651-5 1-5
Engine Injector Cylinder #01 :
Current Below Normal
These diagnostic codes indicate an open circuit (low current) in either the sole-
noid or the wiring for the electronic unit injector.
The Electronic Control Module (ECM) detects the following conditions:
A low current condition (open circuit) for each of five consecutive attempts to
operate
Battery voltage above 9 VDC for 2 seconds
The warning light will come on. The ECM will log the diagnostic code.
The engine will have low power and/or rough running.
When an “Cylinder Cutout Test” is performed, a faulty electronic unit injector
will indicate a low reading in comparison with the other electronic unit
injectors.
The ECM will continue to attempt to operate the electronic unit injector after
the diagnostic code has been logged. An open circuit will prevent the opera-
tion of the electronic unit injector.
652-5 2-5
Engine Injector Cylinder #02 :
Current Below Normal
653-5 3-5
Engine Injector Cylinder #03 :
Current Below Normal
654-5 4-5
Engine Injector Cylinder #04 :
Current Below Normal
651-6 1-6
Engine Injector Cylinder #01 :
Current Above Normal
These diagnostic codes indicate a short circuit (high current) in either the sole-
noid or the wiring for the electronic unit injector.
The ECM detects the following conditions:
A high current condition (short circuit) for each of five consecutive attempts to
operate
Battery voltage above 9 VDC for 2 seconds
The warning light will come on. The ECM will log the diagnostic code.
The engine will have low power and/or rough running.
The ECM will continue to attempt to operate the electronic unit injector after
the diagnostic code has been logged. A short circuit will prevent the operation
of the electronic unit injector.
652-6 2-6
Engine Injector Cylinder #02 :
Current Above Normal
653-6 3-6
Engine Injector Cylinder #03 :
Current Above Normal
654-6 4-6
Engine Injector Cylinder #04 :
Current Above Normal
Follow the troubleshooting procedure in order to identify the root cause of the fault.
Perform this procedure under conditions that are
identical to the conditions that exist when the fault
occurs. Typically, faults with the injector solenoid
occur when the engine is warmed up and/or when the
engine is under vibration (heavy loads).
These engines have Electronic Unit Injectors (EUI).
The ECM sends a pulse to each injector solenoid.
The pulse is sent at the correct time and at the
correct duration for a given engine load and speed.
The solenoid is mounted on top of the fuel injector
body.
An electrical fault can prevent the electronic unit
injector from operating. An open or short circuit in the
ECM that is unique to one electronic unit injector will
prevent that electronic unit injector from operating.
An open or short circuit in common wiring within the
ECM can prevent the two electronic unit injectors that
share that common wiring from operating.
If an open circuit is detected in the solenoid circuit, a
diagnostic code is generated. The ECM continues to
try to fire the injector. If a short circuit is detected, a
diagnostic code is generated. The ECM will
periodically try to fire the injector. If the short circuit
remains, this sequence of events will be repeated
until the fault is corrected.
““Injector Solenoid Test””
Use the “Injector Solenoid Test” to diagnose an open
or short circuit diagnostic code while the engine is not
running. The “Injector Solenoid Test” will send a
signal to each solenoid. The electronic service tool
will indicate the status of the solenoid as “OK” ,
“Open” , or “Short” .
346 UENR4469-36
Circuit Tests
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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