ECU Pinout, AC Problem, O2 sensor

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Aug 18, 2018 | 04:38 AM

blubly

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From: austria

ECU Pinout, AC Problem, O2 sensor

Hello,
i need please a ecu pinout for the Engine controll unit (pics below)
so i can find out for what this white boxes are...... and to chek wires to my O2 Sensors...

And i have the error code B1451 with techstream by my AC means circuit ac compressor valve... but the valve is working when i test it with 12 volt it clicks and OHMs are also OK!
So need also to chek wires so for this ECU may also please a pinout or any other good idea

2004 LS430 UL

Last edited by blubly; Aug 18, 2018 at 04:58 AM.

Aug 18, 2018 | 05:23 AM

2KHarrier

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From: Milwaukee, Wi

Aug 18, 2018 | 05:24 AM

2KHarrier

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From: Milwaukee, Wi

Aug 18, 2018 | 05:25 AM

2KHarrier

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Aug 18, 2018 | 05:26 AM

2KHarrier

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From: Milwaukee, Wi

Aug 18, 2018 | 05:26 AM

2KHarrier

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From: Milwaukee, Wi

Aug 18, 2018 | 05:27 AM

2KHarrier

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Aug 18, 2018 | 05:30 AM

2KHarrier

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Aug 18, 2018 | 05:31 AM

#10

2KHarrier

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Aug 18, 2018 | 05:35 AM

#11

2KHarrier

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Actually, now that I look at them, those white plastic boxes look like they could be aftermarket items.

Does this car have a remote start system installed or an aftermarket alarm?

Aug 18, 2018 | 05:40 AM

#12

2KHarrier

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I looked at the diagram for the Engine ECU, and I don't see anything like those coming off the ECU pigtailed as they are. We just have to figure out what wire they were spliced into??

Aug 18, 2018 | 06:03 AM

#13

blubly

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From: austria

the are for sure aftermarket, and no there is nothing about i know.... the are spliced into
E2 17 and 28
one box to 17
one box to 28
the orignal wires are cut off
and the other wires just look like the are power supply for the boxes

Aug 18, 2018 | 06:15 AM

#14

blubly

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Quote:

Originally Posted by 2KHarrier

SOL+ SOL- is the valve in the AC compressor ? on what ecu or where this pins go sorry i do hard with this diagrams

Aug 18, 2018 | 06:58 AM

#15

2KHarrier

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From: Milwaukee, Wi

Quote:

Originally Posted by blubly

Those both relate to the Oxygen Sensors. Something was added to the car to fool the O2 sensors and now they ain't...
Take a look at the list here and you'll see where those 2 are supposed to go.

Look for OX1B and OX2B in the list VVV