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23 chief: Anyone have experience depinning the Bosch harness?

109 views 9 replies 3 participants last post by  ChiefRN  
#1 ·
I'm still trying to chase down the P132B code. I want to see if maybe the tangs in the terminal are loose on the knock sensor ground wire.
Has anyone done something similar?
I've found videos for other kinds of ecm connectors, but I assume they work basically the same.
Hoping someone has done this before!
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#2 ·
Hey @ChiefRN, that's some dedicated troubleshooting to chase down that P132B code by checking the tangs in the harness. What have the videos you found shown so far for getting those pins out? Adding a few more details about what you've seen might help someone who's done it before chime in with some specific advice for our bikes.
 
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#4 · (Edited)
I wouldn’t if the bike is still under warranty… I don’t know of any issue where anyone here has needed to de-pin the ECM connector …

Generally speaking you need the right de-pinning tool for the connector to release the tang that holds the pin in place …

The knock sensor is on ECM 1 pins 9, 10 … A and B should be the 2 wires from the sensor…

The ground is pins 52, 54 … but you also have brake light power, tail light power … the start/stop switch … front and rear L/R turn signals… if that ground on pins 52, 54 were bad … you wouldn’t be able to start the engine and all the other things connected to ECM 1 would be dead as well …

What have you done… usually a code like that indicates a battery issue … Voltage below normal or shorted to low source … If the wire was shorted to ground … it would likely be closer to the sensor …

Are getting engine knocking?

The knock sensor is at number 6 …
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#5 ·
Hey thanks for the response!
I think the ground is lin 10 on the ECU. I did see something about other kinds being used, but it was in the service manual for the baggers.
The pin out that I have shows only pins 9 and 10 on the ECU being involved.
So far, I changed the knock sensor twice and have taken it to 2 dealerships (one of them replaced the knock sensor again, and the other just cleared the code and "tightened the negative"), and I tried 2 different ECU in the bike.
I've also tested the resistance across the knock sensor connector, and the circuit from the sensor to the ECU connector housing. Really I just want to depin #10 and test it outside the housing, and take a look at the terminal itself.
I found the original OEM connector housing from Bosch, but I'm having trouble finding the specific tool.
 
#8 ·
Here’s a de-pin tool kit …
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#9 ·
If the battery and connections are good and the regulator/rectifier is good … no power issues …

If the sensor has been replaced 3 times …

Then starting at the sensor see how far you can trace the wire … I would lean towards a damaged wire … or a programming issue.
 
#10 ·
It's so strange though...the sensor connector integrate with the rest of the harness bundle and how into the bike frame. Those wires aren't under tension, and shouldn't really be moving at all. Not sure how a wire in there would get flexed or chaffed.
ive been able to follow the wire from just outside the ECU connector housing to about the first bundle around the chassis ground, and it looks fine.
I wonder if taking out the ECU slightly bent one of the fines on the terminal? It's a BCB 0.6mm according stuff I could find
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