DDEC TROUBLESHOOTING
1. Turn vehicle ignition OFF.
2. Connect all connectors.
3. Connect 12 volt from a fully charged battery to the 5-pin power connector.
See Figure 42-10.
4. Connect to ECM.
5. Start engine.
[a] If engine starts, check the battery. If a voltage equalizer is installed, check the
operation of the equalizer. If the equalizer is not working, refer to section 42.3.16.
[b] If the engine does not start, replace the ECM. Refer to section 42.3.16.
Figure 42-10
5-Way ECM Engine Power Connector
42.3.16 Verify Repairs
Perform the following steps to verify repairs.
1. Turn vehicle ignition OFF.
2. Reconnect all connectors.
3. Turn vehicle ignition ON.
4. Clear codes.
5. Start and run the engine for one minute.
6. Stop engine.
7. Check DDR for codes.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION
42-13
