DD15 Troubleshooting – Section 34.1 SPN 174/FMI 0

Section 34.1
SPN 174/FMI 0

SPN 174/FMI 0 indicates the Supply Fuel Temperature Sensor (SFT Sensor) high.‪

Check as follows:‪

1. Turn the ignition ON (key ON, engine OFF).
2. Plug in the diagnostic tool and read the active codes.
   1. If fault 174/3 is active in addition to 174/0, refer to "34.1 SPN 174/FMI 3" .
   2. If fault 174/4 is active in addition to 174/0, refer to "34.2 SPN 174/FMI 4" .
   3. If fault 111/1 is active in addition to 174/0, refer to section SPN 111/ FMI
   4. If only fault code 174/0 is active, go to the next step and repair or replace, as required.
3. Check for coolant loss.
4. Check for blockage in radiator and charge air cooler.
5. Check fan belt condition (slippage).
6. Check for proper location of fan shroud.
7. Check for proper radiator hose condition (no collapsed hoses).
8. Check for proper viscous fan operation
9. Once checks and repairs are done, refer to "34.1.1 Verify Repairs" .

Section 34.1.1
Verify Repairs

Verify repairs as follows:‪

1. Turn ignition OFF.
2. Reconnect any electrical connections that were disconnected to perform the diagnosis.
3. Clear codes with DDDL 7.0 or latest version.

   ENGINE EXHAUST ‪
   To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic.‪

4. Start and bring engine up to operating temperature (over 140°F/60°C).
5. Verify operation is satisfactory and no warning lamps illuminate. If warning lamps illuminate, troubleshoot the codes. If assistance is required, call the Detroit Diesel Customer Support Center at 313–592–5800.