DDEC TROUBLESHOOTING
[b] If resistance is less than 5 , wire #916 (5-volt supply) is shorted to #510/#525
(signal). Repair short or replace wire. Refer to section 12.3.8 to verify repairs.
Figure 12-4
Variable Speed Governor Circuit
12.3.8
Verify Repairs
Perform the following steps to verify repairs.
1. Turn ignition OFF.
2. Reconnect all connectors.
3. Set parking brake, transmission in Neutral.
4. Turn ignition ON.
5. Clear codes.
6. Start and run the engine for one minute.
7. Stop engine.
8. Check DDR for codes.
[a] If no codes are displayed, no further troubleshooting is required.
[b] If code 187/3 is not logged, and other codes are logged, refer to section 9.1.
[c] If code 187/3 is logged, and other codes are logged, refer to section 12.3.1.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION
12-9
