HYLUX PARKING CONTROL SENSOR MODULE REPAIR – Error codes E3, E4 RoHS Module Board PR-B62-04

 

How to repair the parking sensor module.  Printed circuit board has the following RoHS code PR-B62-04 192507

Installed this parking sensor on  Hilux (with metal bumper) by dealer; about 6 months ago;  and now the LCD display had the following errors when driving in reverse.

"E3" and "E4". 

These two sensors 3 and 4 stopped working.

Original Module

Problematic signal transformers

Opened the module and did some tests and found that the signal transformers (variable inductors with two windings) sensors 3 and 4 were in problem; open winding at (pins 4-6).   See the picture below. Searched the internet for this signal transformer marked "UP 04" and found nothing.

There is no information or any other details about this device  fount by internet.  

Inductor Pinout

 Decided to look for a similar module. The module has a label “P/N: PR-2332".  Searched the internet and found some original modules from other GM vehicles with the same "P/N: 2332" and with the same pin configuration. Purchased one of these used GM modules and de-soldered out the two signal transformers, and replaced them at the original module.  

The purchased module cannot be used here because of the firmware is different.

GM module

The purchased GM module,  the LCD display shows nothing and only beeping according to the distance from the obstacle. 

So, leave this tip here for anyone who has problems with this type vehicle's parking module.