Renault Megane / 1999 / 1600 / K7M 702 - Erratic speedo, staling at junctionsArchived Message
Posted by Robert Nicholson on May 4, 2005, 11:14 pm
Hi all,
this was booked in with erratic speedo & stalling at junctions. Code read and came up with Lambda sensor, checked over and replaced both lambda & speed sensor, still stalling & flagging Lambda. I have checked live data thru diag socket with Snappy & KTS, found Lambda to be switching but as it drops staying at zero for short periods so scoped input from Lambda at ECU and found good switching signal with no period at zero? Speed sensor signal (with one wheel off floor running in gear) at ECU input showed square waveform also similar at ECU output to speedo (although typically speedo didn`t flicker when we had wheel jacked) Looking at again in morning any input appreciated