TM 10-3930-675-20-1
0020 00-3
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
2. Place ignition switch in OFF
position
and
disconnect
engine harness from coolant
temperature sensor.
3. Measure resistance from pin
A (or 1) to pin B (or 2) of
coolant temperature sensor.
Resistance should be 300-90k
ohms.
If resistance is not as specified,
replace
coolant
temperature
sensor (WP 0093 00).
4. Ensure that ignition switch is
in OFF position. Disconnect
sensor
harness
connector
from engine ECU.
a. Inspect engine ECU and
sensor harness connectors
for dirty, corroded, bent,
broken, and pushed back or
extended pins.
Clean and repair connector(s) as
required (WP 0111 00).
b. Check engine ECU and
sensor harness for dirt or
moisture
in
or
on
connectors and for missing
or
damaged
connector
seals.
Remove dirt and moisture from
connector. Replace missing or
damaged connector seals (WP
0111 00).
300-90K OHMS
USE TEST LEAD KIT P/N 3822758
