DDEC TROUBLESHOOTING
23.3 TROUBLESHOOTING FLASH CODE 23
The following procedure will troubleshoot Flash Code 23.
23.3.1
Sensor Check
Perform the following steps to check the sensor:
1. Turn ignition OFF.
2. Disconnect the FTS connector.
3. Install a jumper wire between sockets A and B of the FTS harness connector.
see Figure 23-2.
4. Turn ignition ON.
5. Read active codes.
[a] If code 174/4 and any other codes except code 174/3 are logged, refer to section 23.3.2.
[b] If any code except 174/4 is logged, refer to section 23.3.4.
Figure 23-2
Fuel Temperature Sensor
23.3.2
Check for Short to +5 Volt Line
Perform the following steps to check for a short to the +5 volt line.
1. Turn ignition OFF.
2. Remove jumper wire.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION
23-5
