02 sensor wire colors splicing

I have a 2005 2.7l tacoma and im trying to splice my harness side 02 sensor wires to my upstream 02 sensor because my connector has been melted off due to an exhaust leak. I currently have them wrong so I have a check engine light on.

I just need to know what color harness wires go to what on my 2 black one blue and one white 02 sensor wires

Please don't send a diagram im not sure how to read those

Black goes to:__________
Black goes to:__________
Blue goes to:__________
White goes to:__________

Thanx for the help ive been trying to get this right for months.

 

Looks like you need a new harness, that one looks rather crispy. Also no reference to any black wires in the prints for the O2 Sensor.

What I see on my prints for the 2TR-FE are:

Bank 1 Sensor 2 O2 Sensor:

White - White - Terminal 3 - O2 Signal
Green - Green - Terminal 1 - Heater
Brown - Brown - Terminal 4 - Ground
Lavender w/White Stripe - Lavender w/White Stripe - Terminal 2 - Power

Bank 1 Sensor 1 is the Air Fuel Ratio Sensor:

Pink - Pink - Terminal 3 - Sensor signal +
Lavender - Lavender - Terminal 4 - Sensor Signal -
White - White - Terminal 2 - Sensor Power
Red - Red - Terminal 1 - Sensor Heater

 

okay so I figured out im working with sensor 1

Now just have to figure out what those colors connect to on the actual o2 sensor.

I have 2 blacks a white and a blue

 

Thanx for the reply tho man appreciate it

 

Do you by chance have a terminal sequence diagram ?

 

Do you have a aftermarket sensor, because I posted the colors from the service manual specifications?

By the way Blue is Lavender...

 

No I have a oem denzo o2 sensor with basic colors such as 2 blacks a white and blue

Heres another pic of the harness side wires that I'm trying to figure out.. there pretty faded so tell me what you think

 

To me looks like pink yellow blue red, im going to cut the cover a little more back to reveal the clean wires

 

This is the terminals numbers for the Sensor side the harness side will be a mirrored image.

Like this is the harness side:

1 | 2
3 | 4

This would be the Sensor Side:

2 | 1
4 | 3

 

So looking at the colors of your harness we are talking about the Bank 1 Sensor 1 is the Air Fuel Ratio Sensor:

Red - Red - Terminal 1 - Sensor Heater
White - White - Terminal 2 - Sensor Power
Pink - Pink - Terminal 3 - Sensor signal +
Lavender - Lavender - Terminal 4 - Sensor Signal -

 

Thanx for your help

 

Good luck with sorting this out!

 

So far so good no check engine light yet, your the man

 

Well I hope you are good to go!

 

Seeing the condition of those wires, I would have a look at the air/fuel ratio heater fuse to make sure it's not blown.