TM 9-6115-730-24
0013
ELECTRONIC TECHNICIAN (ET) TROUBLESHOOTING - Continued
CORRECTIVE ACTION - Continued
STEP 4.
Check the voltage inputs to ENGINE CONTROL switch and to ECM.
a. Set Battery Disconnect Switch to ON. Set DEAD CRANK SWITCH to
NORMAL. On EMCP set ENGINE CONTROL switch to COOL
DOWN/STOP.
b. Check the voltage between engine ground and the test points in Table 1. If
voltage is not present at a test point, the problem is in the device, in the wire
or in the connector that precedes the point in the circuit. Refer to Figure 1
and FO-1, Sheet 2 as required).
(1) If the voltage is 24 3 Vdc at all test points, the wire 800KEY001-P19-T
between ECM connector ENG-P1-70 and connector ENG-P37 is
defective. Repair wire 800KEY001-P19-T and/or connections between
connector ENG-P37 and ECM connector ENG-P1-70 (WP 0088).
(2) If the voltage is not 24 3 Vdc at a test point, repair the device,
FO-2, sheet 2; FO-4, sheets 1-4).
c.
On EMCP set ENGINE CONTROL switch to OFF/RESET. Set Battery
Disconnect Switch to OFF. Set DEAD CRANK SWITCH to OFF.
Table 1. ECM Supply Voltage Test Points.
DEVICE (Figure 1)
TERMINAL
Diode D1
Either side
DEAD CRANK SWITCH
Terminals for NORMAL crank
J30/P30 connector
9
Resistor Assembly A7
11
Resistor Assembly A7
12
GSC
RM2
ENGINE CONTROL switch
6
ENGINE CONTROL switch
10
GSC
RM1
GSC
RM39
TB-4
17-22
Connector ENG-P37
40
