DaveInDenver
Rising Sun Ham Guru
@Inukshuk @FunkyYota
I have EWD for 1994 Land Cruiser, which may not be at all the same as 1996 or Lexus.
This is the circuit and 26-pin connector.


The part number may be 88240-60660 and seems to apply to all 80 series and LX450. I have not checked for supersede.


So if the p/n and wiring matches, curious about which B-W wire you're seeing a voltage on.
Pin 14 is ignition on power in and pin 2 looks to be maybe neutral (or clutch) cancel? There are circuit reasons why each may measure a voltage open (assuming the constant power is present on 15). If they do show voltage as inputs the current you'd measure externally would be small (I'd expect 𝜇A, if anything) and depending on your meter could indicate zero.
Without the ECU schematic or tearing one apart it's hard to know but at least pin 2 I would not be surprised to see voltage on it open if this thing works like I'm thinking. Pin 14 less so, but not impossible. It's possible IG-on is only a sense line and actually powering any circuits in the ECU.
I have EWD for 1994 Land Cruiser, which may not be at all the same as 1996 or Lexus.
This is the circuit and 26-pin connector.


The part number may be 88240-60660 and seems to apply to all 80 series and LX450. I have not checked for supersede.


So if the p/n and wiring matches, curious about which B-W wire you're seeing a voltage on.
Pin 14 is ignition on power in and pin 2 looks to be maybe neutral (or clutch) cancel? There are circuit reasons why each may measure a voltage open (assuming the constant power is present on 15). If they do show voltage as inputs the current you'd measure externally would be small (I'd expect 𝜇A, if anything) and depending on your meter could indicate zero.
Without the ECU schematic or tearing one apart it's hard to know but at least pin 2 I would not be surprised to see voltage on it open if this thing works like I'm thinking. Pin 14 less so, but not impossible. It's possible IG-on is only a sense line and actually powering any circuits in the ECU.
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