Section 12.1
Description of Flash Code 12
Flash Code 12 indicates that the Variable Speed Governor (VSG) input to the ECM has exceeded 95% (normally > 4.75 volts) of the sensor supply voltage. This diagnostic condition is typically:
- Open sensor return circuit
- Sensor signal circuit is shorted to the sensor +5 volt supply
- Throttle sensor not adjusted properly at full throttle
| DDEC III/IV Single ECM Troubleshooting Guide - 6SE497 |
| Generated on 10-13-2008 |