TM 10-3930-675-20-1
0020 00-4
ENGINE TEMPERATURE SENSORS AND CIRCUITS TROUBLESHOOTING - CONTINUED
0020 00
Table 1. Error Code 1144 - Coolant Temperature Sensor Circuit Failure Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 1144 - Coolant Temperature Sensor
Circuit Failure - Continued
5. Place ignition switch in OFF
position. Disconnect engine
harness
from
coolant
temperature
sensor
and
disconnect sensor harness
connector from engine ECU.
Perform
the
following
resistance checks:
If engine harness requires
replacement, notify SRA.
a. Measure resistance from
pin 2 of sensor harness
connector to all other pins.
Resistance
should
be
greater than 100k ohms.
b. Measure resistance from
pin 3 of sensor harness
connector to all other pins.
Resistance
should
be
greater than 100k ohms.
6. Place ignition switch to OFF
position. Disconnect engine
harness
from
coolant
temperature
sensor
and
disconnect sensor harness
from engine ECU. Perform
the
following
resistance
checks:
If engine harness requires
replacement, notify SRA.
>100K OHMS
