56.3
TROUBLESHOOTING FLASH CODE 56
[a] If the disconnect does not solve the problem, continue the procedure.
Refer to step 2[a]
[b] If the disconnect solved the problem, go to 4b.
2. Connect vehicle interface module, J 41005.
3. Start and run the engine.
4. Observe CEL codes.
[a] If CEL or codes displayed, and the CEL is on with code 250/12 logged, replace the
ECM with a test ECM. Refer to section 56.3.5.
[b] If no CEL or codes are displayed, contact OEM for instructions on how to proceed.
Refer to section 56.3.5.
56.3.5
Verify Repairs
Perform the following steps to verify repairs.
1. Turn vehicle ignition OFF.
2. Reconnect all connectors.
3. Start and run the engine.
[a] If the CEL or codes are displayed, and if code 250/12 is logged, all system diagnostics
are complete. Review this section to find the error.
[b] If the CEL or codes are not displayed, troubleshooting is complete.
All information subject to change without notice.
56-6
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION
