Section
4
TM 9-2320-363-20-1
TROUBLESHOOTING
CHARTS
E. CODE
15 l OIL OR COOLANT
TEMPERATURE
SENSOR
(OTS
OR CTS) SIGNAL
VOLTAGE
LOW
(Cent’d.)
STEP/SEQUENCE
15-5
Check ECM
Connectors
•Check terminals atthe ECM engine
harness connector
(both the ECM
and harness side) for damage;
bent, corroded,
and unseated
pins or sockets. Especially
terminals R2 and Y2 of the ECM
connector.
15-30
Verify
Repairs
l Turn ignition off.
l Reconnect all connectors.
l Turn ignition on.
l Clear codes.
l Note status of “Check Engine”
light.
l if "Check Engine” light does not
stay on, start engine and run until
“Check Engine” light comes on
or for 1 minute. Stop engine.
l Read historical codes.
RESULT
WHAT TO DO NEXT
Terminals and
Replace ECM, page 4-192.
connectors
are okay.
Then go to 15-30.
Problem found.
Repair terminals/connectors,
page 3-2. Then go to 15-30.
Code 25 (no codes).
Repairs
are complete.
Code 15 (and
All system diagnostics
are
any other codes).
complete.
Please review this
section from the start to find the
error.
Any other codes
Go to START-1,page 3-121,
except Code 15.
to service other codes.
3-215
