2000-2001 5thgen Nissan Maxima MAF Sensor Troubleshooting Voltages

Credit: 5thgenmaxima/puppetMaster

Your MAF is located on your air box between your Throttle body and Air filter. It sets about 8-12 inches back from the air filter itself. It has 2 Torx screws holding it down.

The 4 wires are color coated as follows (2000 model) from right to left. (From passenger side to driver side) (Left to right in the pictures)

• White Wire: Signal wire – This will change as your speed/load changes – This is the wire the ECU/TCM takes information from to alter shifts, A/F ratio, timing,etc.
• Red Wire: Reference wire – This should stay the same. This wire is from a hot source and has some sort of resistor to send only 5 V to the wire.
• Black Wire: Ground wire – Should be .05 or less VD from battery ground.
• Red Wire w/ Green Strip: power wire – Should be battery voltage.

Thanks to puppetMaster for the MAF signal specs they are as follows. All readings are at Engine operating temp, and no load. ( radio, head lights, ac, heat off).

• SIGNAL WIRE (White Wire)
  Idle: 1.1V-1.5V  (Alldata says 1.2 – 1.8 volt)
  2500 RPM: 1.7V – 2.4V
• Reference Wire (Red Wire): should be @ or just below 5 V. If this is low your MAF signal wire will send low #’s to the ECU.
• GROUND WIRE (Black Wire): .05V or less – Should not change more than .02 volts with load or engine speed increase.
• POWER WIRE (Red with Green Strip) Battery voltage. (13 – 15V) Should be close to the voltage you get when checking battery terminal to terminal. Alldata says 11-14.
  IMO- If you have 11V your battery is either dead or you have an electrical problem….. again-IMO.

I couldn’t find any specs for the ground or reference so these are universal specs among all domestic/import MAF sensors.