STEP/SEQUENCE
RESULT
WHAT TO DO NEXT
TM 9-2320-363-20-1
Section 4
TROUBLESHOOTING CHARTS
E. FLASH CODE: 37
J1587 CODE: P94 3 - FUEL PRESSURE SENSOR (FPS) CIRCUIT FAILED HIGH (HIGH VOLTAGE)
37-4 Check FPS Connectors
Inspect terminals at FPS
Terminals and
Replace FPS. Then go to 37-
connectors (sensor side and
connectors are okay.
30.
harness side) for damage; bent,
corroded, and unseated pins or
Problem found.
Repair terminals/connectors.
sockets.
Then go to 37-30.
37-5 Check for Short
Turn ignition off.
Less than or
Signal line (ckt #905) is short-
Disconnect engine harness
equal to 10,000 ohms.
ed to engine +5 Volt line
connector at ECM.
(ckt #416). Repair short. Then
Read resistance between sockets
go to 37-30.
W1 and M1 on engine harness
connector.
Greater than
Go to 37-6.
10,000 ohms or open.
37-6 Check for Short to
Battery +
Remove both fuses to ECM.
All readings are
Go to 37-8.
Disconnect vehicle harness
greater than 10,000 ohms
and 5-way power harness
or open.
connectors at ECM.
Any reading is
A short exists between sockets
Read resistance between socket
less than or equal to
where less than 10,000 ohms
M1 of engine harness
10,000 ohms
resistance was read.
connector and socket B3 of
Repair short and reinsert fuses
vehicle harness connector.
(or reset breakers). Then go
Also read resistance between
to 37-30.
socket M1 on engine harness
connector and the following
socketson 5-way power harness
connector: A and C.
Change 3 3-345.299
