No speed inpulse to HU

Rover418275 · 11th June 2009, 17:11

I have had a JVC KD-5000 fitted to my 2004 Automatic Tourer but it is not picking up the mph, direction.
Below is an email from the installer:

We fitted a CAN BUS adaptor to give us a speed pulse for an aftermarket sat nav unit, the adaptor shows a good data signal pickup and gives us a signal for reverse ( which is wired into the dip rear view mirror ) but it won’t give us a speed pulse? All literature shows there should be a speed pulse signal on the can line, also we cannot find an analogue speed pulse at the instrument panel.

The ouput has been checked on a meter to prove it isn’t a fault in the new sat nav unit.

Can anyone offer any help?

Departed · 11th June 2009, 17:48

There is a speed signal on CAN. That's how the speedo works. That's why there's no speed signal to the instruments on a wire.

The OE satnav uses a signal direct from the ABS. On some cars it's missing, but most have it in a small connector just behind the head unit.

I'll be back in a couple of mins with the wire colour etc.

Edit: there is a speed pulse to the IPK. WS wire on pin 6 of one of the two connectors.

In the little connector it's the SG if the facelifts are the same, but the circuit diagrams are confusing.
edit again: 6 way connector. If its present the SG is pin 2.

Rover418275 · 11th June 2009, 18:14

The installer has had a replacement can-bus delivered and I am having it installed tomorrow @ 2 pm, fingers crossed.

11th June 2009, 17:11	#1
Rover418275 Banned Rover 75 Tourer Join Date: Mar 2009 Location: Northwich Posts: 1,099 Thanks: 0 Thanked 2 Times in 2 Posts	No speed inpulse to HU I have had a JVC KD-5000 fitted to my 2004 Automatic Tourer but it is not picking up the mph, direction. Below is an email from the installer: We fitted a CAN BUS adaptor to give us a speed pulse for an aftermarket sat nav unit, the adaptor shows a good data signal pickup and gives us a signal for reverse ( which is wired into the dip rear view mirror ) but it won’t give us a speed pulse? All literature shows there should be a speed pulse signal on the can line, also we cannot find an analogue speed pulse at the instrument panel. *The ouput has been checked on a meter to prove it isn’t a fault in the new sat nav unit.* Can anyone offer any help?

11th June 2009, 17:48	#2
Departed Retired -- Join Date: Jan 2007 Location: -- Posts: 3,785 Thanks: 0 Thanked 4 Times in 4 Posts	There is a speed signal on CAN. That's how the speedo works. That's why there's no speed signal to the instruments on a wire. The OE satnav uses a signal direct from the ABS. On some cars it's missing, but most have it in a small connector just behind the head unit. I'll be back in a couple of mins with the wire colour etc. Edit: there is a speed pulse to the IPK. WS wire on pin 6 of one of the two connectors. In the little connector it's the SG if the facelifts are the same, but the circuit diagrams are confusing. edit again: 6 way connector. If its present the SG is pin 2. Last edited by Departed; 11th June 2009 at 18:15..

11th June 2009, 18:14	#3
Rover418275 Banned Rover 75 Tourer Join Date: Mar 2009 Location: Northwich Posts: 1,099 Thanks: 0 Thanked 2 Times in 2 Posts	Replacement unit The installer has had a replacement can-bus delivered and I am having it installed tomorrow @ 2 pm, fingers crossed.