Skip to main content
vanagon.com
Checking account...
← vanagon.com home · Continue the discussion in the forum
Subject:Electrical Experts. Motronic Hall Reference Voltage?
From:Neil N
Date:Fri, 21 Feb 2014 12:05:57 -0800

Hi all.

This is for Motronic on my 2.0 Jetta powered Vanagon. I am chasing
down a consistent hot start issue. (fuel pressure is ok) I doubt the
hall on distributor is the issue but I am curious of the wiring to it.
I had to repair and modify the wiring harness for this engine swap.

Bentley shows a difference in the + reference wiring to the hall. Most
model years receive ECU supplied +  (5 Volts?), others receive battery
voltage. My Jetta Bentley specifies a minimum 4 Volts at distributor
hall connector.

I can supply images of the diagrams if needed.

I will re-measure this, but would connecting the hall to 12 Volts
shorten the life of the hall, or would it cause the hall to send too
high a voltage square wave to the ECU? If so, is this damaging the
ECU?

Thanks,

Neil.

--
Neil n

Blog: tubaneil.blogspot.ca

'88 Westy http://tinyurl.com/c8rlw6p

'81 VanaJetta 2.0 "Jaco"  http://tubaneil.googlepages.com/

Vanagon VAG *Gas* inline-VR Engine Swap Group:

http://tinyurl.com/d7gd5ej