TROUBLESHOOTING FLASH CODE 12
[b] If measured voltage is greater than 0.2 volts, signal wire is shorted to 12/24 volt
source. Repair or replace #510/#525 circuit. Refer to section 12.3.8.
Variable Speed Governor Circuit
Check for Short
To check for short, perform the following:
1. Turn ignition OFF.
2. Unplug vehicle 30-pin connector and the VSG connector.
3. Turn ignition ON.
4. Enable VSG. Refer to OEM guidelines.
5. Measure resistance between A3 (#916) and D1 (#510). See Figure 12-4.
[a] If resistance is greater than 5 , check ECM connector. Refer to section 12.3.8.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION