4-21
Copyright 2017 Cummins Inc.
TABLE 4-11. ENGINE CRANKS BUT DOES NOT START
WARNING
Many troubleshooting procedures present hazards that can result in severe personal inju-
ry or death. Only qualified service personnel with knowledge of fuels, electricity, and machinery haz-
ards should perform service procedures. Review Important Safety Instructions page.
1. The run signal is not getting out of the
engine interface board (A31). A31
may be bad.
*1. Install harness tool between A31 J4/P4. Reset
the control. Attempt to start and check for B+ at
A31 J4-1. If there is no B+ at A31 J4-1, replace
A31.
Indicator(s) Possible Cause Corrective Action
“OVERCRANK”
(222)
message
−and
While cranking,
Run LED DS12
on the
engine interface
board (A31)
is on.
and
While cranking,
Run LED DS1
on the
governor output
module (A38)
is off.
NOTE:
These
indications
suggest that the
PCC has sent a
run signal to the
governor
module, but the
signal is not
getting through
the governor
module to the
fuel solenoid.
The run signal is not getting through the
governor module to the fuel solenoid.
Reset the control. Attempt to start and check for B+
at A31 J4-1.
2. There is an open between the engine
interface board (A31) and the gover-
nor output module (A38).
3. The run signal is not getting through
the governor output module (A38).
A38 may be bad.
*2. If there is B+ at A31 J4-1, install harness tool be-
tween A38 J6/P6. Check for B+ at
A38 J6-19, while attempting to crank. If there is
no B+ at A38 J6-19, isolate to connectors and
wiring. Repair or replace as necessary.
3. If there is B+ at A31 J4-1, and there is B+ at A38
J6-19, check continuity from A38 J6-15 to bat-
tery ground, if not continuity replace harness, if
continuity, replace A38.
*CAUTION: Wearing a wrist strap, set S12 to Off and A32 S5 to Standby before connecting/disconnecting harness plugs.
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