ECU ground problems

[SrKegler]

I ran a log on my car and the readings indicated a blown sensor ground. (-75F IAT and CTS, 99.6% TPS, 02 volts were 2.50, etc.

I pulled the ECU and spent the day tracing the ground circuit. Cannot find anything wrong. The Caps were replaced earlier this summer.

What do I check next??

 

[donniekak]

Did you trace the ground next to the power in, or the sensor ground on pin 26? Did you check with an ohmmeter?

 

[SrKegler]

No, Mine's a 1G, so I was checling pins 17 & 24. Which pin is the power in?? Thanks for the help btw.

 

[donniekak]

The trace from pin 24 passes under the board. Sometimes you need to remove the heatsink to trace it. Did you use a meter or just visually check it? Does your board have acid damage?

 

[SrKegler]

I just visually checked it. Board doesn't have any acid damage. What pins do I hook together to check it out with the multimeter?

 

[92DSMErdrick]

Like donniekak says you may have to pull the heatplate off to see the board entirely. Pins 17 + 24 are your sensor ground circuits. They join together at different points. Look for a coppery color on the board with possibly blueish marks. I had an Ecu that blew the sensor ground circuit.