156 JTS, ABS/VDC, won't start, can't read codes
I'm new to the forum and have been massively excited about my new 156 until earlier today; I may have broken it. I'd be hugely grateful for some guidance on how I can fix it.
Drove it last on Thursday, no problems at all.
Went out to test fit a new baby seat today so moved the passenger seat about then finished up and locked the car up. Went back out later today as I wanted to check the low and high speed fan circuits were working. My understanding was that the ECU grounds pin 86 of the relays in the engine bay. So:
- Pulled the big black 50A FAN relay on the far left of the box out, got a piece of wire, tucked it in the pin86 connector on the relay socket and refitted the relay.
- Touched the other end of the wire on Batt earth, nothing happened. Ignition was off at the time I think.
- Switched the ignition on, and heard the 2 beeps, 1 for ABS and one for VDC warnings on the info screen.
- Tried turning engine over, turned ok, didn't fire.
- Disconnected Batt earth for 50 mins, reconnected, same warnings.
- Tried connecting my Maxiscan bluetooth EOBD adaptor that I've used on this car before fine, says it can't connect to the ECU so I can't read any codes.
- Checked fuel cutoff under passenger seat, pressed it but no difference.
- Swapped relays around in the engine bay to rule out a dodgy relay, no difference.
- Checked the engine earth on the gearbox, seemed fine, not sure if there's any more.
- Measured battery voltage after only a few attempts at starting, 12.2V.
- If I turn the key to MAR, the fuel pump doesn't prime.
- I think the only warning light on the dash is the triangle shaped one, presumably for the ABS fault.
Any suggestions? I've heard a weak battery can produce faults but surely it wouldn't stop me from being able to read the ECU via the OBD adaptor? Surely I can't have fried the ECU in anyway. The 30A ECU fuse on the battery is fine and the pair of big fuses have continuity.
Any advice would be fantastic.