Tag Archives: Brake

Pivot 3-Drive Alpha Throttle & Auto-Cruise install – Part 2

Where was I? Oh yes, the speed signal wire, or more specifically where the heck is it?! Well it turns out it was right next to me all along, but it was mostly hidden by black electrical tape. It was right underneath the fuse box to the right of the steering column, just underneath the OBD connector. You can see the four bolts that hold the petrol flap and bonnet release catches. The wire is connected to the brown four-pin plug:

Speed signal wire
The brown connector that has the speed signal wire

When viewed from the rear the speed signal wire is third from the left, the blue one with a black trace.

Blue/black wire, third from left.

I cut the black sleeve back so I could tap into the wire and solder on the orange wire that connects to the Pivot’s control box.

Insulation stripped back ready for soldering

With the orange wire soldered on, I then wrapped it securely with black electrical tape and fastened the connector back where it was before.

So on to the throttle harness. Dead easy to fit after yesterday’s dry run. Thinking about it I’m not sure I secured the connectors with a tie wrap so I need to go in again and do that. I don’t want that coming undone!

Next I decided that as i had all of the wiring in roughly the right place I’d get the control box mounted. This box is probably about 70mm x 50mm x 15mm and fits in just nicely behind the driver’s kick panel, which is ideal as most of the wiring is in this area and the long lead from the Pivot display unit easily reaches from the centre screen. It’s fixed in place with the supplied double-sided tape.

Control box

The last part of installation was to connect the white plugs to the control unit and connect the red and grey wires to the brake harness. This is where the fun began.

In part one I mention that, correctly, the white wire is constant 12v. However, I was wrong about the yellow wire being the one I needed for the switched brake signal, except at that point I didn’t know that so I put everything back together and went through the setup routine.

So setup is pretty easy, taking you through configuring the unit so that it knows the throttle voltage at 0% and 100% pedal travel. Once that’s done you need to set the speed pulse setting. For the Elgrand this needs to be set to 2.

Then it was test drive time. The instructions say to be travelling at 35-40 KM/H and press the SET button, at which point cruise control will kick in and the current speed will be held. Except for me it didn’t, instead it showed the error ‘-b-‘. This means that the grey wire to the brake harness isn’t correct. Hmmm.

So back round the block to home, lower dash panel, fusebox cover and kick panel removed. This time I connected the grey wire to the blue wire as in the other thread I’d seen. Another test drive…and still getting ‘-b-‘ when activating cruise. Sigh.

Repeat the above steps but connecting the grey wire to the black wire. Ok, for some reason I’d discounted the black wire (I perhaps assumed it was an earth as Nissan like to use black for earth) and by now somewhat pissed at having to remove the dash again I got the multi-meter out and checked the black wire for 12v when pressing the brake pedal. Bingo! 12v as required. Dash back together.

In summary then: white = constant 12v, black = switched 12v (On my 2003 E51 Rider at least).

And now for another test drive. I got up to the recommended speed and pressed SET…and I had cruise control! Woohoo!

The cruise control works really well, staying within 1mph on fairly flat roads. You can feel it modulating the throttle to some degree but it’s nice and smooth overall. I’ve yet to see how it handles hills.

During my short test drive I also put it into one for the seven Sport modes, SP3, and it felt completely different to the Elgrand’s built in Power mode. So much sharper. I didn’t play with the five Eco modes so I’ll leave that for another time.

So far (after about 10 miles) I’m really impressed with the system. It’s well built with all of the plastics feeling of a high quality and it comes with everything you need to install it, even down to an LED on a wire to test for 12v if you don’t have a meter. The cruise works extremely well, as does Sport mode, and you can even set the rate of change when returning to the set cruise speed (set higher for small cars, lower for big cars). it also looks very stylish and unobtrusive in my opinion.

I’m looking forward now to a good drive with it tomorrow to see how the rest of it works.

Edit: If you need the instructions in English, or you’re just curious to see how the unit works, then here they are (PDF, 443KB).


Pivot 3-Drive Alpha Throttle & Auto-Cruise install – Part 1

Today, after just a couple of weeks, my new Pivot cruise-control/throttle controller arrived. Packaging was sufficient with a couple of layers of bubble wrap around the three boxes. Everything arrived unscathed. Before it could be delivered I had to cough up £49 in customs fees. The unit cost £164 including shipping from Japan.

Inside were the following:

The main unit
The main unit
Brake harness (4-pin)
Brake harness (4-pin)
Throttle harness
Throttle harness

Here’s the unit:

I decided that although I wouldn’t have everything I needed to complete the install I might as well make a start. I’d only have a couple of hours daylight at the most, and I still hadn’t worked out where the speed signal wire can be found.

First I connected the brake harness, which is easy enough (if somewhat awkward) – unplug the existing connector and plug the harness in between the two plugs. The harness only provides a fly-lead for each of the four wires, one of which powers the unit and the other signals that the brake is pressed. I connected the separate earth wire.

I needed to find the constant 12v and the switched 12v in the brake harness. Constant was white and the only other wire with 0v but then had a voltage when the pedal was pressed was the yellow wire, but the voltage was only 0.33v. I’ve seen a similar install on another website where the blue wire is the switched one I need. More investigation is required.

Brake harness connected
Brake harness connected

After that I connected the throttle harness, making sure to first remove the orange waterproof gasket from inside the plug. I fitted a tie-wrap to secure the two plugs together as instructed but realised later that unless I completed the install I’d have to remove the harness as several wires don’t connect up. I started it up to see a 4WD error, the check engine light, and no throttle control!

I decided to mount the unit where it could be easily seen, but wasn’t too obvious, and was in easy reach. I figured I can reach it easily when resting my wrist on my shift knob when in D.

A piece of double-sided tape secures it to the bottom of the screen bezel:

The unit mounted in plain view
The unit mounted in plain view

That’s as far as I’ve got so far. Left to do then:

  • find the speed signal wire and solder the orange wire to it
  • connect the red wire to the constant 12v in the brake harness
  • connect the grey wire to the switched wire in the brake harness
  • Install the throttle harness (again)
  • fix the control unit to the footwell behind the kick-panel
  • plug the connectors into the control unit