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LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

1998 Where do knock sensor wires connect at ECU

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Old Jan 29, 2014 | 02:27 PM
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Default 1998 Where do knock sensor wires connect at ECU

I have a 98 LS400 and one of the knock sensors is bad (according to ODB2) and this is causing a CEL. In my city I can't pass inspection with a CEL even though I pass the emissions test.

Seeing as I don't have the cash or time to take off the intake and replace those I was trying to find out which pins on the ECU are the knock sensors so that I can compare with the good one and rig the wire going to the ecu for the bad one, maybe put a resistor or tap into the good one and put a diode and have it feed into the ECU for the second one. Anyway I have a few ideas but I need to find a wiring diagram or at least know which pins on the ECU are for the knock sensor.

Can anybody help?
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Old Jan 29, 2014 | 03:24 PM
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Attached is from a JDM manual but the lines are the same.
Hope this helps.
Attached Thumbnails 1998 Where do knock sensor wires connect at ECU-knock-sensor-lines.jpg  
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Old Jan 30, 2014 | 08:33 AM
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hell yeah thanks man this is just what I was looking for!
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