TM 9-6115-729-24
0008
TROUBLESHOOTING USING AL FAULT CODES - Continued
SYMPTOM
4.
AL 4
MALFUNCTION
Fault Detected by Engine ECM
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.
On GSC keypad, press ALARM CODES.
STEP 3.
Verify AL4 appears on upper display.
STEP 4.
Verify if any fault codes or engine fault codes are displayed on upper display and
record. Troubleshoot per displayed fault codes (WP 0009).
STEP 5.
Verify the problem has been resolved.
SYMPTOM
5.
AL 5
MALFUNCTION
Low Engine Coolant Level
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.
On GSC keypad, press ALARM CODES.
STEP 3.
Verify AL5 appears on upper display.
STEP 4.
Verify if any fault codes or engine fault codes are displayed on upper display and
record.
STEP 5.
Inspect coolant system lines for leaks.
STEP 6.
Inspect engine coolant system per PMCS (WP 0015).
STEP 7.
Open right engine access door and check engine coolant level in coolant
recovery (overflow) bottle. Check if coolant is low and service surge tank (WP
STEP 8
Troubleshoot per displayed fault codes and WP 0009.
STEP 9.
Verify the problem has been resolved.
0008-5
