TM 5-3805-290-23-1
ELECTRICAL SYSTEM TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
0013 00
STARTING AID OUTPUT CIRCUIT TEST - CONTINUED
2.
Check starting aid power relay supply.
a.
Turn engine start switch to ON position (TM 5-3805-290-10).
b.
Measure voltage between these contacts:
(1)
Supply side (A) of starting aid relay and NEG battery.
(2)
Positive side (C) of relay coil for starting aid and NEG battery.
c.
Expected Results. Battery voltage is present.
(1)
If results are OK, proceed to step 3.
(2)
If results are NOT OK, a problem exists in wires between battery and starting aid. Check fuse and wires.
Replace wiring harness in question (WP 0169 00 thru WP 0175 00). Verify repairs have eliminated prob-
lem.
3.
Check starting aid power relay output.
a.
Disconnect ether starting aid connector (WP 0040 00).
b.
Place a jumper wire (A) and (B).
c.
Turn engine start switch to ON position (TM 5-3805-290-10).
d.
Measure voltage at ether starting aid connector pin 1 harness side.
e.
Expected Results. Battery voltage is present.
(1)
If result is OK, a problem exists in wires between relay and starting aid. Replace wiring harness in ques-
tion (WP 0169 00 thru WP 0175 00). Verify repair has eliminated problem.
(2)
If result is NOT OK, proceed to step 4.
4.
Ground input to power relay at MIC connector.
a.
Turn engine start switch to OFF position (TM 5-3805-290-10).
b.
Disconnect P20 connector from MIC (WP 0170 00) and connect 70-pin breakout T.
c.
Connect MSD to diagnostic connector (WP 0006 00).
d.
Turn engine start switch to ON position (TM 5-3805-290-10).
e.
Use override setting in MSD to engage starting aid.
f.
Measure voltage between P20:43 starting aid control and socket 69 NEG battery on breakout T.
g.
Expected Results. Voltage is 0 when starting aid is engaged.
(1)
If result is OK, proceed to step 5.
(2)
If result is NOT OK, problem exists in wires between starting aid relay and MIC. Replace wiring harness
in question (WP 0169 00 thru WP 0175 00). Verify repair has eliminated problem.
5.
Ground input to power relay at ECM connector.
a.
Turn engine start switch to OFF position (TM 5-3805-290-10).
b.
Remove 70-pin breakout T and connect P20 MIC (WP 0170 00).
c.
Disconnect P1 ECM connector from ECM (WP 0053 00) and connect 70-pin breakout T.
d.
Connect MSD to diagnostic connector (WP 0006 00).
e.
Turn engine start switch to ON position (TM 5-3805-290-10).
f.
Insert jumper wire between J1:43 on breakout T. Monitor status screen on MSD. Slowly connect and disconnect
other end of jumper wire to socket 69 NEG battery on breakout T.
0013 00-69
