DDEC TROUBLESHOOTING
23.1 DESCRIPTION OF FLASH CODE 23
Flash Code 23 indicates that the engine Fuel Temperature Sensor (FTS), see Figure 23-1, input to
the ECM has exceeded 95% (normally >4.75 volts) of the sensor supply voltage.
NOTE:
This code will only be logged during warm engine operation.
This diagnostic condition is typically:
Open sensor signal circuit
Open sensor circuit return
Sensor signal circuit is shorted to the sensor +5 volt supply
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION
23-3
