Weird Battery Voltage problem..

bossman032 · Post by **bossman032** » Tue Mar 27, 2007 10:43 pm

I was just wondering.. if anyone else is having this problem..

I used my Fluke to test battery voltage at battery with the car on its always 14+ volts. But the Kpro voltage goes up and down.. 11.12,13 etc it varies and always changing. I was wondering what can be the exact cause of this. what pin has to go where.. might be a simple wiring mistake or something to do kpro software??

hondata please advise on where to check and what pin (or Plug at the ecu to where)..

thanks in advance!!!

Post by **Hondata** » Wed Mar 28, 2007 8:59 am

You could measure the voltage directly on the ECU - pins 2 (+) and 4 (-) on the A connector - see the help file for the connector pinout.

bossman032 · Post by **bossman032** » Wed Mar 28, 2007 10:23 am

Hondata wrote:You could measure the voltage directly on the ECU - pins 2 (+) and 4 (-) on the A connector - see the help file for the connector pinout.

so the kmanager pulls the voltage readings from those plugs?
well I can use the fluke to monitor it while looking at kmanager to see if they are in sync.

Post by **Hondata** » Wed Mar 28, 2007 11:17 am

KManager just tells us what voltage the ECU is seeing from the ignition source and the main relay input. If it not the same as the battery voltage, then there is some sort of problem, and the approach is to start at one end and isolate where the difference is. You've tested the battery voltage; now test the voltage into the ECU. If there is a difference in voltage, then you next isolate if it is a ground difference or supply difference but measuring the voltage difference between the battery negative terminal and the _ pin into the ECU. Likewise for the battery positive terminal and the + pin into the ECU.