Tahoe 2003. service brake booster. Что за надпись?

[Alex40]

Загорелось на табло service brake booster
Вопрос к спецам-куда копать?

[Anoonakh]

вакуумник или гидробуст, смотря что у тебя стоит

[Gendalfcvale]

Вот что в Митчеле по этому поводу написано.

SERVICE BRAKE BOOSTER Message
The SERVICE BRAKE BOOSTER message will be displayed when the supplemental brake assist signal
circuit is toggled at 1.0 Hz with a 50 percent duty cycle. This message is also displayed if the Instrument
Panel Cluster (IPC) does not see an alive and well signal at key on. When this message is displayed it
indicates a problem with the SBA and should be serviced or replaced.

Ну и гугль перевод.

Сообщение SERVICE Усилитель тормозного привода будет отображаться, когда дополнительный сигнал торможениясхема переключается при 1,0 Гц с рабочим циклом 50 процентов. Это сообщение также отображается, если приборПанель Cluster (IPC) не видит живым и здоровым сигнал на ключ на. Когда это сообщение отображается егоуказывает на проблему с СБА и должны обслуживаться или заменены.

[Anoonakh]

supplemental brake assist - это ж трейлерный тормоз? точнее цепь, управляющая тормозами прицепа

[Anoonakh]

да там и по-английски коряво написано, русский от гугла - вообще ад 

[Gendalfcvale]

Симптомный тэст.

SERVICE BRAKE BOOSTER INDICATOR ON
2003
1. Did you review the brake warning system description and operation and the hydraulic brake assist
system description and operation, then perform the necessary inspections? If so, go to next step. Ifnot,
see HYDRAULIC BRAKE SYSTEMunder GENERAL DIAGNOSIS under TROUBLE
SHOOTING.
2. Start the vehicle. Is the REDUCED BRAKE POWER message displayed for one minute before the
SERVICE BRAKE BOOSTER message is displayed? If yes, go to next step. If no, go to step 4.
3. Perform BRAKE ASSIST SYSTEM DIAGNOSISunder TROUBLE SHOOTING. Did you find and
correct the condition? If yes, go to step 12. If no, go to step 11.
4. Disconnect the supplemental brake assist pump motor connector. See Fig. 36. Test the ignition 1
circuit (Pink wire) between supplemental brake assist pump motor connector and SBA (15-amp) fuse
in underhood junction block for an open or a short to ground. Did you find and correct the condition?
If yes, go to step 12. If no, go to next step.
5. Check Black and Black/White wires between supplemental brake assist pump motor connector and
ground for an open. Did you find and correct the condition? If yes, go to step 12. If no, go to next
step.
6. Test the engine on signal circuit (Dark Blue at generator; Black/White at supplemental brake assist
pump motor) between supplemental brake assist pump motor connector and SBA (15-amp) fuse in
underhood junction block for an open or a short to ground. Did you find and correct the condition? If
yes, go to step 12. If no, go to next step.
7. Test the vehicle speed signal circuit (Dark Green/White wire) between supplemental brake assist
pump motor connector and instrument cluster for an open. Did you find and correct the condition? If
yes, go to step 12. If no, go to next step.
8. Test the supplemental brake assist signal circuit (Dark Blue wire) between supplemental brake assist
pump motor connector and instrument cluster for an open or a short to voltage. Did you find and
correct the condition? If yes, go to step 12. If no, go to next step.
9. Reconnect the supplement brake assist pump motor connector. Disconnect the instrument panel
cluster connector. Connect a DVOM from battery voltage to the supplemental brake assist signal
circuit (Dark Blue wire). Turn the ignition to the Run position while observing the DVOM. Did the
DVOM flash battery voltage? If yes, go to step 11. If no, go to next step.
10. Replace the supplement brake assist pump motor. See SUPPLEMENT BRAKE ASSIST PUMP
MOTORunder REMOVAL & INSTALLATION. After repair, go to step 12.
11. Replace instrument panel cluster. See INSTRUMENT PANEL CLUSTER under REMOVAL &
INSTALLATION in appropriate ANALOG INSTRUMENT PANELS article in ACCESSORIES &
EQUIPMENT. After repair, go to next step.
12. Start the engine. Does the SERVICE BRAKE BOOSTER message stay on? If yes, go to step 2. If no,
system is okay.

[Gendalfcvale]

И название темы более четко формулируй. 

[Alex40]

Спасибо, учту