Checking and cleaning MAF sensors

[vicjak]

Hi,
I wander if you can help me. I have a dilemma with AFM meter in my Patrol.
What could be reason for repetitive AFM meter failure?

Facts:
Patrol 3l diesel 2004 model GU (not a newer mk2) 3.0-litre ZD30TD
everything under bonnet factory, no modifications, std air filter
since 2009 four AFM meteres failed, always buy genuine Nissan
no off road driving, clean city use
dirty AFM meter reason eliminated, it fails electronically, suddenly AFM just stops working not gradually (dramatic loss of acceleration or power on up hill).
Last AFM fitted week ago failed after six days (previous lasted up to two years)

I have done plenty of speculations but has any one had the same repetitive failure problem?
Importantly has any one find out what was the underlying problem?
Victor

[Pezzer]

Hi what about the TB42E ???????????

[Pezzer]

Hi what about TB42E ?

ZD30 Prior series 4
there should be 4 wires at your MAF they'll be Red, White, Black and White terminal 1,2,3 and 4 respectively,
With the car idling, warmed up to normal operating temp, vehicle in nuetral and the AC off test the following;
The 1 (R) should be reading between 1.6 and 2 volts
The 3 (B) should be reading 0v
With the car stopped but the ignition 'on' disconnect the MAF plug and test
The 2 (w) should be reading approx 5v
The 4 (W) should be reading the battery voltage.
If they read these voltages your MAF is fuctioning correctly.

ZD30 Series 4
there should be a 6 pin connector Nothing, White, Black, Red, White and Black, terminal 1,2,3,4,5,&6
With the car idling, warmed up to normal operating temp AC off, in neutral no load test the following
The 3 (B) should be reading 0v
The 4 (R) should be reading between 1.5 to 1.9v at idle increasing to 4.0v when revving through to 4000rpm
With the car stopped but the ignition 'on' disconnect the MAF plug and test
The 2 (W) should be reading the battery voltage
If they read these you MAF is fuctioning

TB45
There should be a Black/Red wire, Black and White wire Term 2,3 &4
With the car idling, warmed up in nuetral and ac off there should be the following
The 3 (B) should be reading 0v
The 4 (W) should be reading 1.3 to 1.8v, and with the engine at 2500rpm should be 2.1 to 2.5v
With the car of disconnect the MAF plug turn the ignition on and test
The 2 (B/R) should be reading the battery voltage

TB48
There should be a White/Green, Yellow, Black/White and Black/Red Term 1,2,3 & 4
With the car idling, warmed up, in nuetral and the AC off there should be the following
The 1 (W/G) should be reading 1.1 to 1.5v, and at 2500rpm 1.7 to 2.4v
The 3 (B/W) should be reading 0v

Turn the car off and disconnect the MAF plug and turn the ignition on
The 2 (Y) should be reading approx 5v
The 4 (B/R) should be reading the battery voltage

RD28
There should be White, Black and Red Term 1,2 &3
With the car idling warmed up in nuetral with the AC off there should be the following
The 2 (B) Should be reading 0v
The 3 (R) should be reading 1.6 to 2.0v

Withe the car off disconnect the MAF plug and turn the ignition on
The 1 (W) should be the battery voltage

If they dont read the battery voltage of the approx 5v at those respective termianls there is most likely a short in the system so check the connectors harnesses and plugs if they don't read the voltages at idle then there is most likely a fault with the MAF.

Tony

[Clunk]

I was just looking for that my self pezzer

[AJTich]

Thanks Tony. Have been looking for the Part No. for just the sensor, but could only find the whole shebang..
A&J.

[Drovers Hill]

Did the adjustments to the DAwes valve fix it Tony? Mine is doing a similar thing. Clyde

[threedogs]

You're on an old thread here don't think some of these guys are still around.
You may find you need to open up Dawes so there is less PSI for the time being
Use your thread for Dawes Questions, I only looked here as I saw your name

[boosh]

I'm just wondering what kind of voltages indicate a bad MAF sensor?
Mine is a 2000 ZD30 showing 2.4v on the red and 0.3v on the black.
Also if it is bad, would it contribute to the motor getting warm? I can drive all day on flat no probs, but hit an incline and it'll start rising. I've got all NADS setup except a new exhaust to put on one day.

[threedogs]

@ Boosh I'd be looking at radiator related problems. hose the bottom
of your radiator, as mud dust etc tend to block the lower half, go gently
as carwash doovas can be a bit high pressure for my likings, don't pull trigger

[boosh]

Yeh the system was flushed not long ago, radiator was all good. I've got a new thermostat on the way now. It's an easy $30 to see if that helps.