combo 2007 1.7 diesel

[robert81]

Hi all
vauxhall combo 2007 1.7 diesel
battery went flat, jump started, running ok
next day battery flat again. didnt want to start any more
non runner now
immo light flashing but transponder ok
can not get much diagnostics with the van - no comms with ecu or immo
got comms with BCM and have 1 present fault - B1485 - (2) exciter current generator terminal 61 low voltage
can anyone glow any light on it?
hallfords garage, where the car is now suggested immo off in ecu.....
in my opinion its not immo fault. i think ecu and immo dont get power hence no comms.

please give me a clue
thanks

[simaservis1108]

That error is usually when the alternator is faulty.
Also check for blown fuses,happened to me once when alternator was faulty,it was blowing 300A fuse.

[smokey08]

I think the immobox is dead, the kline for the ecu also goes through it. Try plugging another immobox in and see if communications with immo and ecu come back.

[robert81]

does anyone know which pins for immo box are +12v and - ?
owner been on holiday for a while and just rung me today. going to have a look on it tomorrow.
id like to check if immo gets any power at all but dont know which pins to check
thanks in advance for any help

[smokey08]

Fuse F3 - Permanent live - Pin 9
Fuse F22 - Ignition live - pin 5
Ground - Pin4

[robert81]

all sorted for now
double checked if power comes up to the plug. it did.
i did connect another immo box. still no coms.
cleaned and played with it a bit and then got coms with "donor" immo
plugged back oryginal immo and car works fine.
so it looks like there was bad contact.
and as smokey mentioned - k-line to ecu must go via immo box.

thanks smokey for your input.
much appreciated.