Nissan Primastar - speedometer not working

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Wed 20 May 2015 15:20
Nissan Primastar - speedometer not working - nissanbob

my nissan primastar spedo has stopped working and will only do 2600 rpm has had a live data check etc but nothing is showing up any ideas

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Wed 20 May 2015 19:59
Nissan Primastar - speedometer not working - elekie&a/c doctor

Does this van have abs braking system??

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Thu 21 May 2015 19:18
Nissan Primastar - speedometer not working - nissanbob

yes it dose a fault came up on the data test for one of the speed sensors this was cleared and did not return

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Thu 21 May 2015 20:00
Nissan Primastar - speedometer not working - elekie&a/c doctor

Speedo not working,but does the mileometer clock up the distance travelled?

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Fri 22 May 2015 00:44
Nissan Primastar - speedometer not working - nissanbob

no mileometer or any computer info mpg average speed etc or distance traveled

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Fri 22 May 2015 08:00
Nissan Primastar - speedometer not working - elekie&a/c doctor

The speed signal for the instruments originates from the abs module.So the wiring from this, to the dash, needs checking.

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Fri 22 May 2015 10:14
Nissan Primastar - speedometer not working - nissanbob

where is the abs module ? wwhat is the best way to check the wireing ? I have had a look at the wires from behind the spedo that go to the radio they look ok except for the yellow wire out of the speedo which I could not get a continuity test with . I have tried to get a wireing diagram but no luck ,thanks for your replys and help

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Mon 25 May 2015 18:02
Nissan Primastar - speedometer not working - chris.o
Hi Nissanbob
I'm not sure where the ABS module is located, but I agree you should have a look around looms/electrical connectors. If you look under the bonnet, near side, left hand front corner, you'll see a black plastic cover under the expansion bottle. Remove this and there are some fuses/relays and loom connectors to check. I would carefully disconnect these connectors and inspect the pins etc for damage/corrosion.
In that same area there is the main ECU. On my van it was protected by a metal frame with tamperproof bolts (I removed these and just fitted normal bolts when finished). I have heard of problems with these terminal where the loom enters the ECU. It's a bit of work but I think it's worth having a careful inspection of these ECU connectors.
Might be worth having the battery off whilst your tinkering.
Chris.
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