New battery - no IDM to BCU communication!

[klaine1]

I've tried everything to get my 2004 Discovery started after i put in a new CPS and new battery. The alarm, windows, locks, and gear shift do not respond. I've tried the key in position II for 5 minutes; the 4 locks and unlocks; holding the key in unlock position for 4 seconds; the 1515 code (but i never got the alarm to light up). I've checked the fuses and they're ok. i've unplugged the serial cable to the BCU and IDM, no go. I don't have my EKA code, but i don't think it would help because the alarm is not responding at all. the M & S and D began flashing after i ran the battery down trying to start the engine. i improperly installed the new CPS (with the spacers on first). i've reinstalled the CPS properly. Should i move to check the Neutral switch, Starter Relay, Reimmobilization coil?? I'm at my wits end, HELP PLEZ!

 

[greg409]

I'm guessing you have SOME indication of power, have you tried plugging in an OBDII reader? - See if you've got any relevent codes?

What caused you to replace the CPS?

luck,greg

 

[klaine1]

Thanks for the reply Greg409. i'm an idiot once again. when i installed the CPS incorrectly by placing the spacers on first, the car would not start, of course. I thought the computer had to reprogram itself, so i disconnected the battery (and bought a new battery needlessly). when i reconnected the battery i blew fuse 13 (Body Control Unit 10a) in the engine compartment fuse box. I never checked that fuse. when i discovered it, I put a new 10a fuse in and the car started perfectly!! no reprogramming necessary! this is a good forum

 

[greg409]

Awesome, I wish they were all that easy, thanks for the follow-up

luck,greg