ZD30 intermittent power loss 0702 fault

Nissan Navara Forum

Help Support Nissan Navara Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

camoo

Member
Joined
Aug 17, 2014
Messages
18
Reaction score
1
Location
sydney
Hey all,
I'm having an issue with my d22 3ltr where it is having intermittent power loss while driving, like the turbo has suddenly stopped.

ECU it throwing a 0702 fault code, top dead centre pulse signal (incorrect signal from the Injection Pump Control Unit)

Any ideas??
 
Sound like the throttle position switch on the gearbox, have you cleared that code(could be an old one) and see if it does it again?
There is thread on here on how to CHECK the Tps with the heat switch, might pay to do a search for it.
 
I thought it was the neutral switch on the gearbox? I tested it with the heat switch, and disconnected it as it was playing up in 3rd and 4th, but even with it disconnected its still occurring. Seems to be ok if the car has been sitting for a bitter bit.
Soon as it gets to operating temp though the fault occurs.
 
sounds like pump is failing.
probably the ecu on the pump or the pickup. either way its $$$$$$
 
I thought it was the neutral switch on the gearbox? I tested it with the heat switch, and disconnected it as it was playing up in 3rd and 4th, but even with it disconnected its still occurring. Seems to be ok if the car has been sitting for a bitter bit.
Soon as it gets to operating temp though the fault occurs.

Sorry yes thats what i meant!!! has nothing to do with tps, was reading another thread and obvoiusly got stuck in my head, and i had a few bourbons.
 
I'll try following the trouble shooting in the workshop manual, but if the pump needs replacing, how much am I lookin at for a new one?
 
Between 3 and 4k usually... You might be able to get an exchange one for cheaper though...
 
Hmm may need to sacrifice my first born.
Thought being a 10 year old car they would be cheaper...
Well that's worst case scenario anyway. May be something simple.... hopefully...
They fault description suggests more of a sensor failure, not mechanical.
And the was the power fault occurs is like someone flicking a switch and then no power.
Turn of the car and the ECU resets after a bit and the power is back.
 
Crank position sensor is used as the" Top Dead Centre" reference point and is know to fail. Thats what code 0702 refers to. TDC pulse signal.
 

Attachments

  • crank sensor TDC.JPG
    crank sensor TDC.JPG
    185.5 KB · Views: 461
Check the plug for a dodgy connection and check the gap to the pickup is o.k. You can check the resistance as well. CPS shouldn't be to expensive, they're just like ABS and speedo pick ups. Get a price from "Nizzbits".
 

Attachments

  • cps test 1.JPG
    cps test 1.JPG
    148.5 KB · Views: 130
  • cps test 2.JPG
    cps test 2.JPG
    164.3 KB · Views: 113
  • cps test 3.JPG
    cps test 3.JPG
    131.1 KB · Views: 155
you can check the crank sensor but i think what the error code refers to is the pick up inside the injection pump. it gets TDC from the injection pump as well so the ecu knows how much difference between crank and pump tdc's.
without knowing the position of the injection pump it won't fire any fuel hence the cutout.
 
Hey guys, thanks for all the help.
Pulled out the sensor, cleaned and tested.
All good on the test, haven't driven it yet though.

Today I managed nearly 20 kilometres before the power went down though.
Hopefully this clean up will help if not ill have to look more into the pump.
Hopefully the electronics side can be separated from the mechanical if replacement is required.
 
Just an update,
Cleaned the crank angle sensor and have been driving around the past two days and have had no dramas.

Hopefully the problem is resolved.

Ill take it for a decent drive on the weekend and see how it goes.
Thanks again for all the advice.
 
Yep... spoke to soon, no power once its warm.
The last 2 days were pretty cold and had no problem.
Bit warmer today and its come back.

Anyone know anything about the electronics side of the pump?
And where in the service manual the info on it is?
 
there is nothing in the manual. its a specialist job. pull the pump send it away. they test and recalibrate the pump to the pumps ecu.
 
seems thats the option ill take.
best way to remove the pump is to follow the vp44 service manual or is there a tutorial on here somewhere?

Any tips?
 
Download it, if you haven't already, and follow the procedure in the D22 service manual. I had to get my injector pump replaced early this year. I didn't do it myself (that was before I joined this forum and found the service manual). With the help of the manual I reckon I would now attempt it myself. It's a pretty big job though- about 8-9 hrs to replace the pump for a mechanic with a fully equipped workshop. There is alot of stuff to remove before you can get the timing cover off and the pump out. Also, one of the main things is to lock the idler gear before removing the cam sprocket, timing chain & pump gear otherwise it's a nightmare to get the timing correct when putting the pump back in.
I think there might also be a special service tool needed. Not sure if you can buy it from Nissan, or make one up or just improvise...
You should also replace all the gaskets & seals (rocker cover, throttle body, glow plugs etc.) with new ones.
In the D22 service manual (D22.zip) open the following folders: D22Navara, then sm, then SM1E-1D22FG1 and open the file titled ec.pdf. The section on injector pump removal and replacement starts on page 762/1038.
 
Last edited:

Latest posts

Back
Top