TM 55-1730-229-12
AG 320A0-OMM-000
TO 35C2-3-473-1
TM 1730-12/1
Table 4-2.
Organizational Troubleshooting (continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
(continued)
30.
Step 4.
If engine shuts down at 95% rpm, disconnect battery and lower control
panel. Disconnect main harness connector P4 from ECU and measure
resistance from pin S of harness connector P4 and ground (figure FO-3
a. If resistance is leas than 200 ohms, 95% enable relay 3K1, or
wire E17A20 (P4-S to P8-A) or E17B20 (3K1-X2 to J8-A) is
shorted to ground. Replace as necessary.
b. If resistance is 200 ohms or more, replace ECU (paragraph
c. Perform operational check.
If engine shuts down when PNEUMATIC POWER switch is turned on, Set
Step 5.
MASTER SWITCH off and disconnect engine harness connector P5 from
load control valve (paragraph 4-75). Measure resistance between pins
A and C of load control valve.
a. If resistance is less than 30 ohms, replace load control valve (paragraph 4-75).
b. If resistance is 38 ohms or more, disconnect battery and check engine harness
wires M1A20 (P2-T to P5-C) and M2820N (P2-X to P5-A). If wiring is not
shorted to ground, replace ECU (paragraph 4-31).
c. Perform operational check.
Step 6.
If engine shuts down during normal operation, set MASTER SNITCH off
and disconnect engine harness connector P4 from fuel shutdown
solenoid (paragraph 4-70). Measure resistance between pins A and B
of fuel shutdown solenoid.
a. If resistance is less than 20 ohms, replace fuel shutdown
solenoid (paragraph 4-70).
b. If resistance is present check engine harness wires G7A20
(P2-J to P4-A) and G8A20N (P2-U to P4-B). If wiring is good,
replace ECU (paragraph 4-31).
c. Perform operational check.
