TM 5-3805-290-23-1
ELECTRICAL SYSTEM TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
0013 00
ENGINE TEMPERATURE SENSORS OPEN OR SHORT CIRCUIT TEST - CONTINUED
1.
Verify all active diagnostic codes.
a.
Connect MSD to cab data link connector (WP 0006 00).
b.
Turn engine start switch to ON position (TM 5-3805-290-10). Wait at least 15 seconds for activation of diagnostic
codes.
c.
Use MSD to verify if any of these diagnostic codes are active:
(1)
105-03 Inlet Manifold Temperature Sensor Open/Short to +Batt
(2)
105-04 Inlet Manifold Temperature Sensor Short to Ground
(3)
110-03 Engine Coolant Temperature Open/Short to +Batt
(4)
110-04 Engine Coolant Temperature Short to Ground
d.
Expected Results. One or more diagnostic codes listed in step c are active.
(1)
If one or more diagnostic codes are active, proceed to step 2.
(2)
If codes are logged but not active and engine is not running properly, refer to Troubleshooting Without a
Diagnostic Code (WP 0008 00). If engine is running properly at this time, an intermittent condition may be
causing logged codes. Refer to Electrical Connectors Inspection (WP 0022 00).
2.
Inspect electrical connectors and wiring. Refer to
Electrical Connectors Inspection (WP 0022 00).
a.
Disconnect Engine ECM from wiring harness
(WP 0053 00).
b.
Thoroughly inspect ECM engine harness con-
nector J1/P1 and suspect sensor connector.
c.
Perform 10 lb (45 N) pull test on each wire in
sensor connector and ECM connector associated
with active diagnostic code.
d.
Verify connector latch tab is properly latched
and has returned to fully latching position.
e.
Check ECM connector (socket-head screw) for
427-B0717
proper torque of 55 lb-in. (6 Nm).
f.
Check harness and wiring for abrasions and
pinch points from sensor to ECM.
g.
Connect engine ECM to wiring harness (WP
0053 00).
h.
Expected Results. All connectors, pins, and sockets should be completely coupled and/or inserted. Harness and
wiring should be free of corrosion, abrasions, and pinch points.
(1)
If results are OK, proceed to step 3.
(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 completely coupled. Clear all inactive diagnostic codes. Verify
repair has eliminated problem. Proceed to step 3 if fault has not been eliminated.
3.
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.
Access Active Diagnostic Code screen on MSD and check for active diagnostic codes.
c.
Determine if problem is related to open circuit diagnostic code or short circuit diagnostic code.
0013 00-47
