TM 5-3805-291-23-1
ELECTRICAL SYSTEM TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
0013 00
USER DEFINED SHUTDOWN INPUT CIRCUIT TEST - CONTINUED
5.
Short user defined shutdown switch at ECM.
a.
Disconnect ECM connector J1/P1.
b.
Remove wire X918 PU at ECM connector P1-40. Remove wire X919 WH at ECM connector P1-23 and digital
return wire H795 PK from ECM connector P1-5.
c.
Insert a wire with socket terminals at each end into ECM connector P1-23, P1-40, and P1-5. Short wire jumpers in
P1-23 and P1-5.
d.
Reconnect all connectors.
e.
Turn engine start switch to ON position (TM 5-3805-291-10).
N OT E
Digital return will no longer be connected to other sensors and switches. Additional diagnostic codes will be
generated from ECM. Clear codes after you complete this test.
f.
Observe status of user defined shutdown switch on ET.
g.
Turn engine start switch to OFF position (TM 5-3805-291-10).
h.
Remove short between P1-23 and P1-5.
i.
Short wire jumpers in P1-40 and P1-5.
j.
Turn engine start switch to ON position (TM 5-3805-291-10).
k.
Observe status of user defined shutdown switch on ET.
l.
Turn engine start switch to OFF position (TM 5-3805-291-10).
m.
Remove short between P1-40 and P1-5.
Expected Results. Status reads "OFF" when short is between P1-23 and P1-5. Status reads "ON" when short is
n.
between P1-40 and P1-5.
(1)
If results are OK, problem is in harness between ECM connector and user defined shutdown switch.
Replace wiring harness in question (WP 0195 00 thru WP 0201 00). Ensure seals are properly in place and
connectors are securely connected. Verify repair eliminates problem.
(2)
If results are not OK, replace ECM (WP 0057 00).
ENGINE SPEED/TIMING SENSOR CALIBRATION
0013 00
1.
System Operation Description:
N OT E
A timing calibration will not increase available engine power.
ECM can calibrate mechanical differences between Top Center (TC) of flywheel and TC of timing gear on camshaft.
A magnetic transducer signals TC of flywheel to ECM when a notch on a counterweight passes by transducer. Engine
speed/timing sensor signals TC of timing gear to ECM. Any offset between TC of flywheel and TC of timing gear is
stored in ECM memory.
