TM 9-6115-730-24
0009
TROUBLESHOOTING USING GSC FAULT CODES - Continued
CORRECTIVE ACTION - Continued
STEP 10.
Remove engine harness connector ENG-P100 from the new sensor. Leave
ENG-P100 disconnected.
a. Use a jumper wire long enough to reach from engine harness connector
ENG-P100-1 to the engine ground stud.
b. Install jumper wire onto ENG-P100-1.
STEP 11.
Set Battery Disconnect Switch to ON. Set DEAD CRANK SWITCH to NORMAL.
On EMCP turn the ENGINE CONTROL switch to COOL DOWN/STOP.
STEP 12.
On GSC keypad, press GSC ALARM CODES button.
a. Verify a diagnostic code 03 appears.
b. Short the jumper wire (ENG-P100-1) to the engine ground.
c.
Verify a diagnostic code 04 appears. This verifies the ECM is working
properly.
STEP 13.
Turn ENGINE CONTROL switch to OFF/RESET. Battery Disconnect switch is
OFF, DEAD CRANK SWITCH is OFF.
STEP 14.
Remove the jumper wire and connect all wires and connectors.
If a diagnostic code 03 and/or a diagnostic code 04 did not appear in STEP 13,
repair or replace the engine harness. Verify the problem has been resolved.
STEP 15.
If the problem is not resolved, replace ECM (WP 0082).
STEP 16.
Verify the problem is resolved.
NOTE
The low coolant sensor is powered by 8 Vdc from the GSC. When coolant is present at the
sensor, a logic low (near zero volts) is sent to the GSC. When coolant is not present at the
sensor, a logic high is sent to the GSC.
SYMPTOM
18.
CID 111 E FMI 03
CID 111 E FMI 04
MALFUNCTION
Low Coolant Sensor.
FMI 03 - Voltage Above Normal.
FMI 04 - Voltage Below Normal.
CORRECTIVE ACTION
STEP 1.
Set Battery Disconnect Switch to ON. Set DEAD CRANK SWITCH to NORMAL.
On EMCP turn the ENGINE CONTROL switch to COOL DOWN/STOP.
STEP 2.
Disconnect ECM to EMCP harness connector ENG-P16 from low coolant sensor
0009-13
