TBS Posted August 9, 2021 Report Share Posted August 9, 2021 Hello, Does anyone know why customer car is showing 18 volts on program and if i measure it on ecu harness its 14,4 volts. -Samuli Quote Link to comment Share on other sites More sharing options...
Adamw Posted August 10, 2021 Report Share Posted August 10, 2021 That would most commonly be caused by the main power supply missing (a blown fuse or similar). With no connection to the battery any flyback voltage from inductive devices cannot be dumped back to battery so the internal voltage gets "pumped up". Asuming it is a wire-in ecu, unplug the ecu, turn on ignition and confirm there is 14V on pin A5. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.