Using the all the vehicles components, L77 (6.0L) and 6L80. Also have the BCM and gas pedal from the vehicle....
Car starts and idles but no throttle response. When scanning, the pedal at idle is approximately 20% and goes to 80% when floored. The throttle position never moves when the pedal is pressed (stays around 20%-25%).
I have tested all the wires at the pedal and getting appropriate readings
Low Signal = 2-3 ohms to chassis ground
5V reference = 4.98 volts
APP1= .977-4.09 (rest to full throttle)
APP2 = .47 - 1.95 volts (rest to full throttle)
Test the low signal and 5V reference at throttle body and test correctly.
Getting the following codes:
P2120
P2122
P2127
P2128
* all in reference to APP
Have tried clearing codes and the P2120 is permanent
I'm thinking something shorted in ECM.
Thoughts??