cruise control and hill start assist not working after Viper alarm removal
I recently had a garage disconnect a Viper 5701 alarm system that was installed in my R55 fJCW Clubman (Dec '09) because it was found to be causing a high battery discharge rate. The garage have told me that they simply unplugged the power supply to the Viper system, and subsequently everything seemed to be working fine..
However, after receiving the car back, I have found that the Hill Start Assist no longer works when tested on an incline, and neither does the cruise control - specifically, I can turn the cruise control on, but if I then press the + or - buttons there is no response from the car.
There are no warning lights or messages that advise of any faults or errors. I am hoping that this is a simple fuse replacement since all the garage did was disconnect the third-party alarm system. I'm reluctant to return to the garage since they should really have tested the car after disconnecting the alarm.
I assume most would be reluctant to waste more time with a garage that has already misdiagnosed their car (in relation to high battery drain) before rectifying the issue and not fully testing the car before returning it. The car was away from me for three days the first time, two days the second, and I don't know what else I could be tied into if I returned!
As to your suggestion, yes, it could potentially help regarding the cruise and HSA, but then I would still have the high battery drain issue which has just been resolved and paid for, and doesn't get me any closer to being able to disconnect the alarm without disabling cruise and HSA.
Last edited by sailesh; Apr 7th, 2014 at 06:02 PM.
Yeah, you're both right, and thanks for your help. It's always the problem with diagnosing third-party mods, especially electronic. The garage are quite sure that the viper system is more deeply connected than it first seem, hence the speed signal is not being sent to the cruise control and hill start control modules.
"VIOLET/WHITE Tachometer input
This input provides the module with information about the engine’s revolutions per minute (RPMs). It can be connected to the negative side of the coil in vehicles with conventional coils.
Note: This wire MUST be used when installing this unit on a manual transmission."
So, it may be that if I check the wiring of this feed to the Viper and restore it, things will go back to normal... if not I'm going to a professional uninstaller!
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