TM 9-6115-729-24
0013
ELECTRONIC TECHNICIAN (ET) TROUBLESHOOTING - Continued
CORRECTIVE ACTION - Continued
STEP 5.
Check the voltage to the + battery Inputs of the 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 2. 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 3,
FO-2, sheet 2; and FO-4, sheets 1-4.
(1) If voltage is present on terminal 87 of the slave relay (SRY) but not
present at the ECM, repair the wires between the ECM and the SRY
(2) If the voltage is not 24 3 Vdc at a test point, check that voltage is
present at terminal 85 and terminal 30 of SRY and voltage is not present
on terminal 87 of SRY, verify that the wire from terminal 86 of SRY has
continuity to the -battery. If the wire from terminal 86 of the SRY has
continuity to the -battery, replace SRY (WP 0054). Repair the device,
connectors and/or wiring.
DEVICE
TERMINAL
J30/P30 connector
8
Slave relay (SRY)
85
Circuit breaker CB4
1
Circuit breaker CB4
2
SRY
30
SRY
87
c.
On EMCP set ENGINE CONTROL switch to OFF/RESET. Set Battery
Disconnect Switch to OFF. Set DEAD CRANK SWITCH to OFF.
d. Verify the problem has been resolved.
