DDEC TROUBLESHOOTING
[b] If the resistance measurement is less than or equal to 1,000 , the vehicle +5 volt line
(#916) is shorted to the return line (#952). Repair short. Refer to section 11.3.12.
Figure 11-6
Variable Speed Governor Circuit
11.3.11 Check for Open +5 Volt Line
Perform the following steps to check for an open +5 volt line.
1. Install a jumper wire between sockets A and C of the hand throttle sensor harness
connector. See Figure 11-6.
2. Measure resistance between sockets A3 (#916) and C3 (#952) on the vehicle connector.
[a] If the resistance measurement is less than or equal to 5 , refer to section 11.3.9.
[b] If the resistance measurement is greater than 5 , or open, the vehicle +5 volt line
(#916) is open. Repair open. Refer to section 11.3.12.
11.3.12 Verify Repair
Perform the following steps to verify repairs:
1. Turn ignition OFF.
2. Reconnect all connectors.
3. Turn ignition ON.
4. Clear codes.
5. Start and run the engine for one minute.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION
11-11
