STEP/SEQUENCE
RESULT
WHAT TO DO NEXT
TM 9-2320-363-20-1
Section 4
TROUBLESHOOTING CHARTS
E. FLASH CODE:
24
J1587 CODE:
P174 4 - FUEL TEMPERATURE CIRCUIT FAILED LOW (LOW VOLTAGE)
24-5
Check ECM Connectors
Check terminals at the ECM
Terminals and
Reprogram ECM. Then go to
engine harness connector
connectors are okay.
24-30.
(both the ECM and harness side)
for damage; bent, corroded, and
Problem found.
Repair terminals/connectors.
unseated pins or sockets.
Then go to 24-30.
Especially R3 and Y2 of the
ECM connector.
24-30
Verify Repairs
Turn ignition off.
(No codes).
Repairs are complete.
Reconnect all connectors.
Turn ignition on.
Code 174/4 (and
Al l system diagnostics are
Clear codes.
any other codes)
complete. Please review this
Note status of "Check Engine"
section from the start 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 174/4
to service other codes.
or 8 minute. Stop engine.
Read inactive codes
Change 3 3-345.251
