FIRST STEP FOR DIAGNOSING A FAULT WITHIN THE DDEC SYSTEM
2. Read active codes by selecting the DIAGNOSTIC CODE MENU (ACTIVE CODES)
on the DDR.
[a] If active codes are displayed on the DDR, follow the appropriate diagnostic
procedures for the codes received. Refer to the section number that is the same as
the Flash Code number.
[b] If the DDR display is blank or random, refer to section 10.5.
[c] If DDR displays NO DATA or DDEC Info not available, refer to section 10.8.
[d] If the DDR display reads "No Active Codes", refer to section 10.8.
Read Inactive Codes
Perform the following steps to read inactive codes.
1. Plug DDR into the DDL connector.
2. Read inactive codes. (Select inactive codes on the DDR.)
[a] If DDR displays no inactive codes, the problem may be intermittent.
Refer to section 10.1.
[b] If DDR display is blank or random, refer to section 10.5.
[c] If DDR displays NO DATA or DDEC Info not available, refer to section 10.5.
[d] If the DDR displays any inactive codes, clear the codes and refer to section 9.1.4.
Attempt to Make Codes Active
Perform the following steps to make codes active.
1. Start and run the engine for eight minutes. Warm the engine. Coolant/oil temperature
must be greater than 140
2. If required, perform road test with an assistant.
[a] If CEL or SEL illuminate, read codes and refer to the section number that matches
the flash code number logged.
[b] If CEL or SEL do not illuminate and no codes log, return to service.
[c] If CEL or SEL do not illuminate but symptom occurs, refer to section 10.1, and
Diagnosis by Symptom.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION