TM 9-6115-730-24
0009
TROUBLESHOOTING USING GSC FAULT CODES - Continued
NOTE
This procedure is used for FMI codes 03 and 04 for all pressure sensors.
SYMPTOM
12.
CID 94 E FMI 03
CID 94 E FMI 04
MALFUNCTION
Fuel Pressure Sensor.
FMI 03 - Voltage Above Normal.
FMI 04 - Voltage Below Normal.
CORRECTIVE ACTION
STEP 1.
On EMCP, turn ENGINE CONTROL switch to OFF/RESET. Battery Disconnect
Switch is OFF; DEAD CRANK SWITCH is OFF.
STEP 2.
Inspect connectors ENG-P2 on the engine harness (FO-2, sheet 1) and ENG-P1
on the ECM to EMCP Harness (FO-2, sheet 2).
STEP 3.
Conduct an appropriate pull test on wires in the ENG-P2 and ENG-P1 connectors
to ensure wires are tight and secure.
STEP 4.
Check the wires on both harnesses for abrasion and pinch points (WP 0088).
Repair and/or replace the connectors and/or wiring (WP 0088).
STEP 5.
If necessary, disconnect the harness connectors, for the fuel pressure sensor, oil
pressure sensor, turbo outlet pressure sensor, atmospheric pressure sensor, and
turbo inlet pressure sensor.
STEP 6.
Set Battery Disconnect Switch to ON. Set DEAD CRANK SWITCH to NORMAL.
On EMCP turn the ENGINE CONTROL switch to COOL DOWN/STOP.
STEP 7.
Measure 5.0 +/- 0.2 Vdc between terminals A (supply) and B (return) at each
sensor connector.
a. If 5.0 +/- 0.2 Vdc is not measured on all sensor connectors, remove ENG-P2
from ECM J2. Check for 5.0 +/- 0.2 Vdc on the pins for the bad sensor
reading (WP 0088 and FO-2 Sheet 1). Verify continuity of the signal wire
(pin C) for the suspect sensor connector.
b. On EMCP, turn ENGINE CONTROL switch to OFF/RESET. Battery
Disconnect Switch is OFF; DEAD CRANK SWITCH is set to OFF.
(1) If the voltage was present, repair/replace the ECM J2 engine harness
(2) If the voltage was not present, replace the ECM (WP 0082).
c.
Reconnect all of the sensor connectors.
d. Set Battery Disconnect Switch to ON. Set DEAD CRANK SWITCH to
NORMAL. On EMCP turn the ENGINE CONTROL switch to COOL
DOWN/STOP. Retest the system.
0009-8
