TM 55-1730-229-12
AG 320A0-OMM-000
TO 35C2-3-473-1
TM 1730-12/1
Organizational Troubleshooting (continued)
Table 4-2.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
(continued)
90.
If resistance is
C.
Check resistance betwewen P2-J and P2-Y.
greater than 1 ohm, wait for engine oil to cool.
After engine oil cools, recheck resistance between P2-J and
d.
P2-Y. If resistance is now leas than 1 ohm, switch and harn-
ess are good. If resistance is still greater than 1 ohm, do
step e.
Open engine access door. Cut and remove lockwire from high
e.
oil temperature switch connector P10 (9, figure 4-31).
Disconnect electrical connector from high oil temperature
switch (10). Check engine harness wires A14A20 (P2-J to
P10-B) and A14A20N (P2-Y to P10-A) for continuity (see F0-3
If wiring is good, replace high oil temperature
supervisor.
switch (paragraph 4-42).
THERMOCOUPLE MALFUNCTION.
91.
If a thermocouple malfunction is suspected, teat the thermocouple as follows:
Disconnect battery.
a.
b.
Tag and disconnect wires from posts of thermocouple (14,
C.
Measure resistance across thermocouple posts. Resistance
should be leas than 10 ohms. Reading should remain steady
when posts are wiggled. If resistance is greater than 10
ohms or does not remain steady when posts are wiggled,
replace thermocouple (paragraph 4-43).
Measure resistance from each thermocouple post to the case.
d.
Insulation resistance reading should be greater than 10K
ohms. If not, replace thermocouple.
e.
Lower control panel and disconnect engine harness connector
P2 from ECU. Check (see FO-3 sheet 2) engine harness Wiring
between P2-G and thermocouple no. 8 (CR), and between P2-H
and thermocouple no. 10 (AL). Replace any defective wiring.
If wiring is good, reconnect P2 to ECU.
