TM 5-3805-291-23-1
ELECTRICAL SYSTEM TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
0013 00
5V ENGINE PRESSURE SENSOR SUPPLY CIRCUIT TEST - CONTINUED
e.
Connect J1/P1 and J2/P2 ECM connectors.
f.
Place battery disconnect switch in ON position (TM 5-3805-291-10).
g.
Measure voltage between jumper wire in P1-2 (5V sensor supply) and jumper wire in P1-3 (sensor return).
h.
Measure voltage between jumper wire in P2-72 (5V sensor supply) and jumper wire in P2-17 (sensor return).
i.
Place battery disconnect switch in OFF position (TM 5-3805-291-10).
Expected Results. Each voltage measurement is 5.0 0.2 VDC.
j.
If results are OK, the voltage measurement is 5.0 0.2 VDC. The ECM is operating correctly.
Repair. One of the supply wires is shorted to another wire in the harness or one of the supply wires is shorted to
k.
engine ground. To isolate the problem to a specific harness, perform the following test steps:
One at a time, install wiring for each 5V supply while you check ET for an active 262-03 or 262-04 diagnostic
code.
(1)
Disconnect particular ECM connectors.
(2)
Install wires that were removed for 5V supply at this ECM connector.
(3)
Connect ECM connectors.
(4)
Place battery disconnect switch in ON position (TM 5-3805-291-10).
(5)
Monitor active diagnostic code screen on ET. Check for an active 262-03 code or an active 262-04 code.
N OT E
Wait at least 30 seconds in order for diagnostic codes to become active.
(6)
If a diagnostic code becomes active for this 5V supply, there is a problem in this harness between ECM
and sensor connector.
Repair. Repair wiring and/or connector. Replace parts, if necessary. Verify problem is resolved.
l.
If results are not OK, the voltage measurement is not 5.0 0.2 VDC.
m.
Replace engine ECM (WP 0057 00).
0013 00-12
