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engine immobiliser

williamj

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Can anyone help us. My son has a VR sedan with a electrical problem. No immobiliser light flashing, no electric windows, no cruise control. no central locking, and not starting by key , but will run when the starter relay is removed and puting a jumper between the terminals that except 30 and 87 on the relay
 

FXST01

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Tried some new relays/checked fuses?
On the VPs, fuse 11 controls cruise control, mirrors, door locks
 

axemurderer101

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yep check fuses first, if your car still wont crank with the key but will still start when you bridge the start relay there is a grey wire with blue trace where your shifter is which you can just cut then earth to a bolt and you should be able to start it. had a vr wagon come into work which wouldnt crank with the key but would start when you bridge the start relay, basically we werent getting an earth for the start relay and traced it back to the bcm and the customer wanted a cheap fix so we just earthed the grey/blue wire which is near the inhibitor switch on the shifter.
 

mikee

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did you get it worked out..my mates dad is an auto elec..ill ask him next time see him..
 

Rgsyes

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I have had similar trouble like this.
I have earthed the Blue /Grey wire now it cranks without reprogramming new key.( previously i had to leave the ignition on for apprx. 1 hr. hear the click then it would start and run.)
Now with the wire earthed it cranks over but doesnt fire, I tried jumping the fuel pump relay & no go.
any suggestions would help.
 

Psmithavsupplies

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check the body control module (bcm), its behind the fuse cover (in car) above the heater duct. the body control module deals with all the security inc immobiliser, it possible the key and bcm are not talking.
Rgsyes, i belive bypassed the immobiliser, this is a very handy trick especially if you have a BCM issue.
 
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