DDEC TROUBLESHOOTING
2. If a variable hand throttle sensor is installed, adjust idle position (low-speed) stops on
the hand throttle sensor.
3. If fixed resistors are installed, replace with new resistors. (Minimum counts MUST
be greater than 48.)
4. Turn ignition ON.
5. Read VSG counts with throttle at low-speed position.
[a] If the idle count reading is greater than 48 counts, refer to section 11.3.12.
[b] If the idle count reading is less than 48 counts, refer to section 11.3.5.
11.3.5
Check Hand Throttle Sensor Connectors
Perform the following steps to check the hand throttle sensor connectors.
1. Turn ignition OFF.
2. Inspect the terminals at the hand throttle sensor connectors (sensor side and harness side)
for bent, corroded and unseated pins or sockets. See Figure 11-2.
[a] If the terminals and connectors are not damaged, replace hand throttle sensor.
Refer to section 11.3.12.
[b] If the terminals and connectors are damaged, repair as necessary.
Refer to section 11.3.12.
Figure 11-2
Variable Speed Governor Circuit
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION
11-7
