Checking and cleaning MAF sensors

[YNOT]

This pic shows the position of the Mass Air Flow sensor (on my ZD30) on the top of the air filter housing. Shown here with the wiring cover removed.



The testing procedure is done at the back of the plug with suitable probes to interrogate the wiring. The main test is for battery voltage at terminal 4 and supply voltage (5volts) at terminal 2 (white wire). Then you should have 1.6 – 2.0 volts at the red wire of terminal 1 with the engine idling. Voltage will increase as engine revs increase.


To remove the sensor you will need a T20 torx bit. After removing the two retaining screws, gently twist the sensor and remove from housing.
To clean the MAF sensor you will need a suitable cleaner, I got CRC MAF cleaner from Repco, I had to ask for it, it wasn't on display.
Do not touch any of the surfaces of the sensor, let the cleaning spray do the work. If you work over a white cloth, you can see the color of the solvent coming off, keep going untill the solvent comes off clean.


This pic shows the sensor cleaner, the sensor removed from the housing, and the torx bit used to remove it.



If you do need to replace the MAF sensor, these are the part numbers to use. These numbers are just for the sensor shown in the photo above. This is significantly cheaper than replacing the WHOLE air flow meter, housing and all.
ZD 30 Series 1-3 22680AD21A (previously 22680AD210 which was before that 22680 AD201)

ZD30 Series 4 22680 7S000

Tony

[YNOT]

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

[teago]

HI Tony I have a 2005 gu with a ZD30 motor the maf part no is 22680 7S000, However the wire codes are different to those quoted by you , mine are looking from the front of the vehicle left to right
nothing, yell/blue,yell/gren,red,blk ie 5 connectors
Can you give me the voltages /details tks and rgds teago

[teago]

Tks very much threedogs Cheers Teago

[chrysler]

g~day sorry for my lack of understanding my MAF shows......a..nothing,white,green/yel,green/yel,pink,black? i do not know what series it is?
regards Rob

[Pepper]

Mine is the same as crysler above ....nothing,white,green/yellow,green/yellow,pink,black ...also my wires all have cuts in the insulation it appears that the nissan dealer did this to check voltages with a probe.....i cant get any voltage readings with my volt meter will try again...

[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

[patch697]

Top post Tony, This will save some members a lot of dosh as now thay can DIY it.

Cheers
Paul

[Pete's GU3]

Thought i would give you some feedback Tony , i followed your instructions re the maf sensor , took it out , bought a can of that cleaner from repco cost me $25. sprayed the sensor all over thoroughly , noticed it all the black stuff dripping off , it wasn't too bad to start off with anyway , put it all back together again. Now i will see if i get any power loss after about an hours driving that i have experienced , hopefully it will be ok , but at this stage it still the same as before i cleaned it which is pretty good . My ZD30 has got very good take off , has no lag !!!!