STEP/SEQUENCE
RESULT
WHAT TO DO NEXT
TM 9-2320-363-20-1
Section 4
TROUBLESHOOTING CHARTS
E.
FLASH CODE:
23
J1587 CODE:
P174 3 - FUEL TEMPERATURE CIRCUIT FAILED HIGH (HIGH VOLTAGE)
23-5
Check ECM Connectors.
Check terminals at the ECM
Terminals and
Replace ECM. Then go to
engine harness connector
connectors are okay.
23-30.
(both the ECM and harness side)
for damage; bent, corroded, and
Problem found.
Repair terminals/connectors.
unseated pins or sockets.
Then go to 23-30.
23-30
Verify Repairs
Turn ignition off.
(No codes).
Repairs are complete.
Reconnect all connectors.
Turn ignition on.
Code 174/3 (and
All system diagnostics are
Clear codes.
any other codes).
complete. Please review this
Note status of "Check Engine"
section from the first step to find
light.
the error.
If "Check Engine" light does not
stay on, start engine and run until
Any other codes
Go to START-1, pg 3-345.41,
"Check Engine" light comes on
except Code 174/3.
to service other codes.
or 8 minute. Stop engine.
Stop engine.
Read inactive codes.
Change 3 3-345.247
