STEP/SEQUENCE
RESULT
WHAT TO DO NEXT
TM 9-2320-363-20-1
Section 4
TROUBLESHOOTING CHARTS
E. FLASH CODE: 36
J1587 CODE: P100 4 · OIL PRESSURE CIRCUIT FAILED LOW (LOW VOLTAGE)
36-8 Check for Open +5
Volt Line
Turn Ignition off.
Less than or
Go to 36-9.
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 the OPS
5 ohms or open.
#416) is open. Repair open.
connector.
Then go to 36-30.
Read resistance between sockets
W1 and Y2 on the engine harness
connector.
36-9 Check for Short
Remove jumper wire.
Less than or
The engine +5 Volt line (ckt
Read resistance between sockets
equal to 10,000 ohms.
#416) Is shorted to the return
A and C of the OPS harness
line (ckt#452). Repair short.
connector.
Then go to 36-12.
Greater than
Go to 36-12.
10,000 ohms or open.
36-10 Check for Short to
Battery +
Remove both fuses to the
All readings are
Go to 36-12.
ECM.
greater than 10,000 ohms
Disconnect the vehicle harness
or open.
and 5-way power harness
connectors at the ECM.
Any reading is
A short exists between the
Read resistance between socket
less than or equal to
sockets where less than
10,000
P2 of the engine harness
10,000 ohms.
ohms resistance was read.
Repair short and reinsert
connector and socket B3 of the
fuses (or reset breakers).
vehicle harness connector.
Then go to 36-30.
Also read resistance between
socket P2 on the engine harness
connector and the following
sockets on the 5-way power
harness connector: A and C.
Change 3 3-345.293
