Help please
06 CRD - first started out as an intermittent no start issue but now its a paperweight
Ok so heres what I can see / done and tearing hair out.......
1) Key on - everything normal - the red immo light goes on for about 2 seconds then goes off (same behaviour on both keys) red immo light doesnt flash or stay lit - if using the key - see point 8
2) trying to start - it doesnt crank, just a momentary click from the starter (very very short duration) - but its not a dead battery - battery voltage 12.9, on a charger / paralleled to another battery on the floor - if i keep the key turned to the start position, the click is every second (tonk - tonk - tonk) the radio goes off when doing this trying to start (to me that means the igntion key, key barrel, ignition switch itself is passing the "request" on)
3) if I short out the starter relay with needle nose pliers (pin 80 and 37) - the starter cranks the engine over perfectly- which is why this doesnt feel like a battery issue, and its not the wire from fise box to starter
4) starter has been pulled out and bench tested and it works perfectly
5) I have used an obd tool with a key programmer / reader addon, it verifies that both keys transponders are present and identifiable
6) the obd tool verifies that the coil around the ignition barrel is working and receiving the signal from the transponder in the key, when the tools own coil is placed around the ignition key
7) there are no codes in the SKIM / SKREEM module (there were from unplugging / re-plugging with power on, but those cleared) the only code is a known issue with right front abs sensor
ignition switch has been seperated from the key barrel so a screwdriver can actuate it - same result (the key is inserted into the SKIM antenna circle and the red immo light goes off after 2 seconds and doesnt flash / stay on - unless I force it to, by removing the key from the SKIM antenna and trying to start using the ignition switch with a screwdriver9) the ignition key barrel rod etc - is 100% nothing broken - the behaviour on the screwdriver actuating it versus the key is 100% the same
10) Relays have been swapped over with other ones with matching part codes in the relay box - no change
So if its not the immobiliser, key switch mechanism, relays - what else is causing this ?
What wires etc could have "voltage drop" on them - seems to me the "relay" isnt being triggered hard enough by the key ?
is this a TIPM problem ?
is that possible ?
What all to check ?
open to any and all ideas on this
Thanks for reading
