TM 9-6115-729-24
0011
TROUBLESHOOTING FAILURES WITHOUT FAULT CODES - Continued
MALFUNCTION
Auxiliary Fuel Pump Relay.
CORRECTIVE ACTION
STEP 1.
On EMCP set ENGINE CONTROL switch to OFF/RESET. Set Battery
Disconnect Switch to OFF. Set DEAD CRANK SWITCH to OFF.
STEP 2.
Measure resistance between float level switch FL2B at J8-3 and TB5-21
(Ground).
STEP 3.
If not between 600 and 800 ohms, repair or replace wire harness (WP 0090) or
replace AFPR (WP 0058).
STEP 4.
If between 600 and 800 ohms, check fuel level switch assembly (WP 0055).
STEP 5.
Verify the problem has been resolved.
MALFUNCTION
Auxiliary Fuel Pump Faulty.
CORRECTIVE ACTION
STEP 1.
On EMCP set ENGINE CONTROL switch to OFF/RESET. Set Battery
Disconnect Switch to OFF. Set DEAD CRANK SWITCH to OFF.
STEP 2.
Open control box (WP 0020).
STEP 3.
Measure resistance between relay AFPR-9 and AFPV-1 (FO-4, sheet 2 and
sheet 4). If no continuity, repair or replace wire harness (WP 0043).
STEP 4.
Verify wire from auxiliary fuel pump is connected securely to AFPV-1 (WP 0058).
If not secure, repair wiring (WP 0090) or replace auxiliary fuel pump (WP 0058).
STEP 5.
Verify the problem has been resolved.
SYMPTOM
31.
Engine Runs Out of Fuel With No LOW FUEL LEVEL Alarm.
MALFUNCTION
Fuel Level Switch Assembly.
CORRECTIVE ACTION
STEP 1.
On EMCP set ENGINE CONTROL switch to OFF/RESET. Set Battery
Disconnect Switch to OFF. Set DEAD CRANK SWITCH to OFF.
STEP 2.
On EMCP, set AUX FUEL switch to OFF (down).
STEP 3.
Open left front doors, left rear doors, and right rear doors.
STEP 4.
Unplug ENG-P11 from low fuel alarm switch FL1 (WP 0055 and FO-1, sheet 3).
STEP 5.
With fuel level above two inches or fuel level indicator on EMCP showing fuel,
measure resistance between J11-1 and J11-2 (FO-1, sheet 3). If not open circuit,
replace fuel level switch assembly (WP 0055).
0011-41
