Post TSB/SSM 50472 Brake Booster Line Swap

[Allen_in_Colorado]

Hey everybody.

I've got a broncin' Bronco with a Brake issue after doing my own vacuum line swap.
Easy part: 2021 with 2.3. Old-school vacuum brake booster.
Tricky part: New issue ABS DTC C101A:29-AF

Can someone offer any hint at next step?

Original issue:
TSB/SSM 50472 - 2021-2022 Bronco - 2.3L - Illuminated Brake Warning Lamp
And/Or Brake System Warning Message – DTC P050F Set In The ABS
Module And Firm Brake Pedal

This issue was solved with new line MB3Z2420K, see below.


Parts:
1) Brake Booster line (2021 TSB) MB3Z2420K. (for P050F error)
2) Dorman Vacuum Sensor 926-464 FL3Z2C444. (C101A:29 error)

After MB3Z2420K replacement I have 1 new error:
==ABS DTC C101A:29-AF===
Code: C101A - Vacuum Pressure Sensor

Additional Fault Symptom 29):
- Signal Invalid

- New sensor and clearing codes didn't fix the error.

As part of a fix, i examined pins/crimps on sensor connector, I didn't like one of them. Someone check my work, I messed up a pin, and re-soldered all 3:
Pinouts of Brake Booster Sensor plug (all under 1 Ohm of resistance measured from brake booster connector to ABS modulo.)
Pin 1 5v
Pin 2 Ground
Pin 3 Signal wire

When measured for voltage on pin 3 signal wire I see 2.2 V when vehical is plugged in and running. No osiliscope to use.

Does a Year 2021 ABS module need an update for new parts MB3Z2420K and FL3Z2C444 ??

Thank you in advance.

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[Ducati1098]

Sounds like you got the pins mixed up.

 

[Allen_in_Colorado]

Perfect...attempting it now...ty!

EDIT: That fixed it. Thank you!

 

[Allen_in_Colorado]

Thanks again, that fixed it.

 

[Ducati1098]

Thanks again, that fixed it.

No problem!

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