TM 5-3805-290-23-1
ELECTRICAL SYSTEM TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
0013 00
ENGINE PRESSURE SENSOR OPEN OR SHORT CIRCUIT TEST - CONTINUED
b.
Disconnect and thoroughly inspect these engine pressure sensors. Refer to Electrical Connectors Inspection (WP
0022 00):
(1)
J1/P1 ECM Engine Harness Connector (WP 0053 00).
(2)
J20/P20 Machine Interface Connector (WP 0170 00).
(3)
J200/P200 Boost Pressure Sensor (WP 0065 00).
(4)
J201/P201 Engine Oil Pressure Sensor (WP 0066 00).
c.
Reconnect all connectors.
d.
Perform 10 lb (45 N) pull test on each wire in
ECM connector and sensor connectors associ-
ated with active diagnostic code.
e.
Check ECM connector (socket-head screw) for
proper torque of 55 lb-in. (6 Nm).
f.
Check harness and wiring for abrasions and
pinch points from sensors back to ECM.
427-B0668
g.
Expected Results. All connectors, pins, and sockets should be securely connected and inserted. Harness and wiring
should be free of corrosion, abrasions, and pinch points.
(1)
If results are OK, proceed to step 4.
(2)
If results are NOT OK, replace wiring harness in question (WP 0169 00 thru WP 0175 00). Ensure all seals
are properly in place and connectors are securely connected. Verify repair eliminates problem. Use MSD
to clear all logged diagnostic codes.
4.
Verify diagnostic code is still active.
a.
Turn engine start switch to ON position (TM 5-3805-290-10). Wait at least 15 seconds for activation of diagnostic
codes.
b.
Use MSD to check for active diagnostic codes. Record all active diagnostic codes.
c.
Determine if problem is related to open circuit diagnostic code or short circuit diagnostic code.
d.
Expected Results. Either short circuit diagnostic code is active or open circuit diagnostic code is active.
(1)
If short circuit diagnostic code is active, proceed to step 5.
(2)
If open circuit diagnostic code is active, proceed to step 6.
0013 00-35
