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

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Fact of the week
In March 2002, identical twins in Finland died on the same day in similar accidents within hours of each other. A 70-year-old man was killed by a truck while cycling; hours later, his twin brother was killed by a truck on the same road, about a mile away, before the family had been informed of the first accident.
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edition #1256 - 13 November 2025
Automation is a key theme in the stories we have in this week’s Forkliftaction News ... Continue reading
Fact of the week
In March 2002, identical twins in Finland died on the same day in similar accidents within hours of each other. A 70-year-old man was killed by a truck while cycling; hours later, his twin brother was killed by a truck on the same road, about a mile away, before the family had been informed of the first accident.