STEP/SEQUENCE
RESULT
WHAT TO DO NEXT
TM 9-2320-363-20-1
Section 4
TROUBLESHOOTING CHARTS
E. FLASH CODE: 38
J1587 CODE: P94 4 - FUEL PRESSURE CIRCUIT FAILED LOW
38-7 Check ECM
Connectors
Check terminals at the ECM
Terminals and
Replace ECM. Then go to
38-30.
harness connector (Both ECM
connectors are okay.
and harness side) for damage;
bent, corroded, and unseated pins
Problem found.
Repair terminals/connectors.
or sockets. Especially WI, M1,
Then go to 38-30.
and Y2 terminals and pins at
ECM.
38-8 Check for Open +5
Volt Line
Turn ignition off.
Less than or
Go to 38-9.
Disconnect the engine harness
equal to 5 ohms.
connector at the ECM.
Install a jumper wire between
Greater than
The engine +5 Volt line (ckt
sockets A and C of FPS
5 ohms or open.
#416) is open. Repair open.
harness connector.
Then go to 38-30.
Read resistance between sockets
W1 and Y2 on engine harness
connector.
38-9 Check for Short
Remove jumper wire.
Less than or
Engine +5 Volt line (ckt #416)
Read resistance between sockets
equal to 10,000 ohms.
is shorted to return
A and C of FPS harness
line (ckt #452). Repair short.
connector.
Then go to 38-30.
Greater than
Go to 38-12.
10,000 ohms or open.
Change 3 3-345.307
