TM 5-3805-290-23-1
ELECTRICAL SYSTEM TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
0013 00
ENGINE PRESSURE SENSOR OPEN OR SHORT CIRCUIT TEST - CONTINUED
1.
Check for active +5V sensor supply diagnostic codes.
a.
Connect MSD to diagnostic 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.
Verify any of these diagnostic codes are active:
(1)
262-03 5V Sensor dc Power Supply Short to +Batt
(2)
262-04 5V Sensor dc Power Supply Short to Ground
d.
Expected Results. One or more diagnostic codes listed in step c are active.
(1)
If results are as specified, perform 5V Engine Pressure Sensor Supply Circuit Test in this work package.
(2)
If results are not as specified, proceed to step 2.
2.
Verify all active diagnostic codes.
a.
Turn engine start switch to ON position (TM 5-3805-290-10). Wait at least 15 seconds for activation of diagnostic
codes.
b.
Verify any of these diagnostic codes are active:
(1)
100-03 Engine Oil Pressure Open Short to +Batt
(2)
100-04 Engine Oil Pressure Short to Ground
(3)
102-3 Boost Pressure Open Short to +Batt
(4)
102-4 Boost Pressure Short to Ground
N OT E
These diagnostic codes should not be active:
a. 262-03 5V Sensor dc Power Supply Short to +Batt
b. 262-04 5V Sensor dc Power Supply Short to Ground
c.
Expected Results. One or more diagnostic codes listed in step b are active.
(1)
If results are as specified, proceed to step 3.
(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).
3.
Inspect electrical connectors and wiring.
a.
Disconnect and thoroughly inspect these terminal connections on P1 ECM connector (WP 0053 00). Refer to Elec-
trical Connectors Inspection (WP 0022 00):
(1)
P1:14 Boost Pressure
(2)
P1:24 Engine Oil Pressure
(3)
P1:26 +5V
(4)
P1:34 Sensor Common
0013 00-34