How do the S13/S14 MAF connector pins map to the Z32 MAF connector?

Pin 1 (MAF Signal) goes to Z32 pin 1, pin 2 (Ground) goes to Z32 pin 2, and pin 3 (12v Power) goes to Z32 pin 3.

What is the extra 'G' pin on the Z32 MAF connector for?

The diagram labels the Z32 'G' pin as 'Ground to Chassis,' meaning it should be connected to a chassis ground.

Are the connectors in the diagram shown from the front or the back?

Per the note on the diagram, the connectors are shown from the back, with the wires coming out toward the viewer.

Which S13/S14 MAF pin carries 12 volt power?

Pin 3 on the S13/S14 MAF connector is labeled 12v Power and connects to pin 3 on the Z32 connector.

Which pin carries the MAF signal in this Z32 conversion?

Pin 1 carries the MAF Signal on both the S13/S14 connector and the Z32 connector.

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Nissan 240SX S13/S14 to Z32 MAF Connector Wiring Diagram - Pinout Guide

MAF connector pinout diagram mapping S13/S14 pins to Z32 pins with color-coded wires

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Wiring diagram mapping S13/S14 MAF connector pins to a Z32 connector with signal, ground and 12V power wires.

AI caption September 2005 · Photo 10 of 77

This hand-drawn wiring diagram shows how to convert the mass air flow (MAF) sensor connector wiring from a Nissan S13/S14 (240SX) 3-pin MAF connector to a Nissan Z32 (300ZX) 4-pin MAF connector — a common MAF upgrade. The top of the diagram depicts the S13/S14 MAF connector with pins 1, 2, and 3; the bottom depicts the Z32 MAF connector with pins 1, G, 2, and 3. Color-coded arrows indicate the pin-to-pin mapping: pin 1 carries the MAF Signal (S13/S14 pin 1 to Z32 pin 1), pin 2 is Ground (S13/S14 pin 2 to Z32 pin 2), and pin 3 is 12v Power (S13/S14 pin 3 to Z32 pin 3). The Z32 connector's additional 'G' pin is labeled 'Ground to Chassis,' indicating it should be grounded to the vehicle chassis. A footnote clarifies that both connectors are shown from the back, with wires coming out, so the installer views the correct pin orientation when splicing. The document contains no part numbers, wire gauge specifications, or amp ratings — it is strictly a pinout/mapping reference for the Z32 MAF swap.

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Frequently asked questions

How do the S13/S14 MAF connector pins map to the Z32 MAF connector?: Pin 1 (MAF Signal) goes to Z32 pin 1, pin 2 (Ground) goes to Z32 pin 2, and pin 3 (12v Power) goes to Z32 pin 3.
What is the extra 'G' pin on the Z32 MAF connector for?: The diagram labels the Z32 'G' pin as 'Ground to Chassis,' meaning it should be connected to a chassis ground.
Are the connectors in the diagram shown from the front or the back?: Per the note on the diagram, the connectors are shown from the back, with the wires coming out toward the viewer.
Which S13/S14 MAF pin carries 12 volt power?: Pin 3 on the S13/S14 MAF connector is labeled 12v Power and connects to pin 3 on the Z32 connector.
Which pin carries the MAF signal in this Z32 conversion?: Pin 1 carries the MAF Signal on both the S13/S14 connector and the Z32 connector.