DDEC TROUBLESHOOTING
38.3 TROUBLESHOOTING FLASH CODE 38
The following procedure will troubleshoot Flash Code 38.
38.3.1
Multiple Code Check
Perform the following steps to check for multiple codes.
1. Turn vehicle ignition switch ON.
2. Plug the diagnostic data reader (DDR) into the diagnostic data link (DDL).
3. Read active codes.
[a] If active code 94/4 and no other codes were logged, refer to section 38.3.2.
[b] If active code 94/4 and any or all of the following codes were logged, 94/3, 100/3 or
4, 101/3 or 4, 110/3 or 4, 174/3 or 4, 175/3 or 4, refer to section 90.1.
[c] If active code 94/4 and codes other than the following codes were logged, 94/3, 100/3
or 4, 101/3 or 4, 110/3 or 4, 174/3 or 4, 175/3 or 4, refer to section 38.3.2.
38.3.2
Sensor Check
Perform the following steps to check the sensor.
1. Turn ignition switch OFF.
2. Disconnect FPS connector and install a jumper wire between sockets B and C of the
FPS harness connector. See Figure 38-2.
3. Turn ignition ON.
4. Read logged codes.
5. If active codes 94/3 or 4 are not logged, start and run the engine until either these active
codes display or engine temperature (COOLANT TEMP & OIL on DDR) has been greater
than 60
C (140
F) for more than one minute.
[a] If active code 94/4 and any other codes are logged, refer to section 38.3.4.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION
38-5
