Discussion:
K21/K25

Wont accellerate or rev.
Swapepd the ecm into another truck, ecm works fine in that truck.
any ideas?

pin 104 stays B+ and wont go negitive to activate the ETC relay
so pin 3 is 0v not B+
O2 sen voltage on pin 24 is high 6-10v
crank sensor pin 13 high 6.0v
cam sensor pin 14 high 2,5v
LPG inj pin 119 and 120 low 2.0v
acc pedal sen voltage high pin 91 5v

Any idea what drives pin 104 ?
  • Posted 29 Jan 2025 16:31
  • By john_andrews
  • joined 26 Jul'24 - 3 messages
  • California, United States
John A

Post your Reply

Forkliftaction accepts no responsibility for forum content and requires forum participants to adhere to our rules of conduct. Click here for more information.

If you are having trouble using the Discussion Forums, please contact us for help.

Latest job alerts …
Muncie, IN, United States
Latest job alerts …
Muncie, IN, United States
Fact of the week
In Germany, the 9th of November is sometimes called Schicksalstag, the "Day of Fate" because it has been the day for several major historical events, including the horrors of Kristallnacht in 1938 and the fall of the Berlin Wall in 1989.