TM 9-6115-730-24
0013
ELECTRONIC TECHNICIAN (ET) TROUBLESHOOTING - Continued
SYMPTOM
10.
Engine Fuel Pressure Reading.
This procedure is required if a fuel pressure problem is suspected.
MALFUNCTION
Poor engine performance. Low fuel pressure is suspected.
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.
Connect the Cat ET to connector CDC-P7 (WP 0012).
STEP 3.
Set Battery Disconnect Switch to ON. Set DEAD CRANK SWITCH to NORMAL.
On EMCP set ENGINE CONTROL switch to MANUAL START.
STEP 4.
Establish communication between Cat ET and the engine's ECM.
STEP 5.
Select STATUS from the icons list on the Cat ET.
STEP 6.
Select a group of engine sensors that include the fuel pressure. Read the fuel
pressure with the engine running.
a. The pressure should be 85 to 90 psi (586 to 655 kPa) during both normal
operating conditions and load conditions.
b. The pressure should be 85 to 90 psi (586 to 655 kPa) at low idle.
c.
If the fuel pressure is not within spec, troubleshoot the restriction and replace
STEP 7.
Verify the problem has been resolved.
0013-32
