52.3 TROUBLESHOOTING FLASH CODE 52
The following procedure will troubleshoot Flash Code 52.
Multiple Code Check
Perform the following steps to check for multiple codes.
1. Turn vehicle ignition switch ON.
2. Plug in the diagnostic data reader (DDR).
3. Read active codes.
[a] If active codes other than 254/12 are logged, service them first.
[b] If active code 254/12 is logged, and no other codes are logged, hook up test ECM.
If code clears, replace the ECM. If code is not cleared, contact Detroit Diesel
For information concerning ECM replacement, refer to section 2.9 in the service manual.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION