TM 5-3805-290-23-1
ELECTRICAL SYSTEM TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
0013 00
FUEL TRANSFER PUMP CIRCUIT TEST - CONTINUED
g.
Expected Results. When jumper wire is con-
nected, relay should be closed. When jumper
wire is disconnected, relay should be open.
(1)
If results are OK, proceed to step 6.
(2)
If results are NOT OK, problem exists in
wiring harness between MIC and ECM
connector. Replace wiring harness in
question (WP 0169 00 thru WP 0175
00). Verify problem has been eliminated.
If repair has not eliminated problem,
proceed to step 6.
427-B0724
6.
Override fuel transfer pump to test ECM.
a.
Turn engine start switch to OFF position (TM 5-3805-290-10).
b.
Remove 70-pin breakout T.
c.
Connect P1 ECM connector (WP 0053 00).
d.
Connect MSD to diagnostic connector (WP 0006 00).
e.
Turn engine start switch to ON position (TM 5-3805-290-10).
f.
Use MSD to monitor status screen.
g.
Use override parameter for fuel transfer pump to turn fuel transfer pump ON.
h.
Verify fuel transfer pump is either enabled or disabled.
i.
Expected Results. Fuel transfer pump is working properly.
(1)
If results are OK, ECM is operating properly.
(2)
If results are NOT OK, ECM is not working properly. Replace ECM (WP 0053 00). Verify repair has elim-
inated problem.
SET SPEED CIRCUIT TEST
0013 00
N OT E
Use this test to verify set speed switch receives proper supply voltage and to check that set speed switches
operate correctly.
Set speed switch provides operator with ability to select desired engine speed. Engine speed will decrease with
increasing load. Set speed control can be used for engine speed or for vehicle speed depending on engine appli-
cation.
Set speed switches are:
a. P1:28 Set Speed Control ON or OFF
b. P1:11 Set Speed Continue or Accelerate
c. P1:20 Set Speed Set or Decelerate
Warning lamps are used to indicate status of set speed control.
