Fuel injector wiring diagram needed?

KEVIN TIPTON

MEMBER
2002 MAZDA 626
2.0L
4 CYL
2WD
AUTOMATIC
200,000 MILES

Does anyone have a wiring diagram for the fuel injector wiring connectors for the car listed above? I had to replace the electrical plugs on the injectors and forgot to mark the plugs. Now I’m not sure which plug goes to which injector.

Friday, September 8th, 2023 AT 9:05 AM

3 Replies

JACOBANDNICKOLAS

MECHANIC
108,200 POSTS

Hi,

Absolutely, I can help. If you look at pic 1 below, I zoomed in specifically on the fuel injectors. You can see the wiring color for each injector. Note: Each injector will have two wires. Each one has a white wire with a red tracer. That wire should always have power with the key in the run position. The second wire is a different color for each injector. Those ones provide the ground path to the PCM to complete the circuit.

Additionally, the remaining pics are of the entire powertrain management circuit. I figured I would add it in the event it is needed.

Let me know if this helps or if you have any questions.

Take care,

joe

See pics below. Note, the full wiring schematic starts with pic 2. Each page from the manual was cut in half to make it readable for you. I did overlap each one so you can follow from one to the next.

Images (Click to make bigger)