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SERVO BRAKE SENSOR - UBS55 - 1990

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SERVO BRAKE SENSOR - UBS55 - 1990

Postby AndySaraSonia » Thu Aug 24, 2017 7:33 am

Dear my Isuzu Colleagues;
During a lot of time I try in my way to arrange and put in order my Isuzu Trooper, UBS55, 4jb1-TC (2.8TDI), 1990
Last week, I checked that the brake lamp (dashboard) remains lighting and I stat to investigate which sensor was falling
I checked the level hydraulic fluid, is ok
I checked the hand break switch, is ok
And then I check the servo brake system (vacuum hose), and I discover that the sensor located in this area is out of work. The vacuum seems ok. When I take out the cable, the lamp in the dashboard switch off, if I put again the cable, the lamp switch on
I understand that this sensor / switch works with the vacuum, but is damage
My surprise is when I check the mechanical suppliers, nobody knows this sensor: Mitsubihi, Toyota, Nissan, Land Rover, Bosch, Faes…

Can anybody to help me to find this? And his name? Because I try to find in aftermarket suppliers, but only I can find the oil pression sensor

Best regards;
Tot.jpg


P.D. How I can insert the picture???
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AndySaraSonia
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Vehicle: Isuzu Trooper 2.8 TDI, 4jb1-tc, 1990

Re: SERVO BRAKE SENSOR - UBS55 - 1990

Postby geeves » Thu Aug 24, 2017 1:04 pm

first question
Do the brakes work ok?
If they are very hard the problem is lack of vacuum not the switch. Its very unusual for these switches to fail. They should be common on a lot of cars
Sanding your knuckles before starting work can help. That way you cant skin them
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Re: SERVO BRAKE SENSOR - UBS55 - 1990

Postby AndySaraSonia » Fri Aug 25, 2017 5:22 am

Dear Geeves;
When I finished my work, I checked the vacuum
Immediately to start the motor, I check the vacuum in the line, and approximately -550mmHg (picture)
After five minutes, I check the vacuum in the sensor position, and a little bit more than -700mmHg (picture)
I press the brake sometimes, and no changes. The gauge remains stable
I think so that the vacuum level is Ok. What do you think?
I need a new sensor…but I cannot find… :|
Thanks for your reply
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AndySaraSonia
Isuzu Baby
 
Posts: 10
Joined: Thu Mar 30, 2017 8:43 pm
Age: 41
Country: Spain
City: Barcelona
Vehicle: Isuzu Trooper 2.8 TDI, 4jb1-tc, 1990


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