TSRM/MK4 Supra/Repair Manual
Repair ManualWiring Diagrams
p.097

BAT/Brakes, ABS & TRAC Systems — Dtc 55 Brake Fluid Level Warning Switch Circuit, page 98

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p.099
Dtc 55 Brake Fluid Level Warning Switch Circuit — MK4 Supra Brakes, ABS & TRAC Systems, page 98
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Page text (OCR transcript)
BR–98
BRAKE SYSTEM – ANTI–LOCK BRAKE SYSTEM (ABS)

DTC 55 Brake Fluid Level Warning Switch Circuit
CIRCUIT DESCRIPTION

The brake fluid level warning switch sends the appropriate signal to the ECU when the brake fluid level drops.

DTC No. | Diagnostic Trouble Code Detecting Condition | Trouble area

55 | Voltage at ECU terminal LBL is 0 V continuously for 10 sec. or more. | Brake fluid level
Brake fluid level warning switch
Short in brake fluid level warning switch circuit
ECU

Fail safe function: If trouble occurs in this circuit, the ECU cuts off current to the TRAC solenoid relay and prohibits TRAC control.

WIRING DIAGRAM

W
1B 1J
J/B No.1
W B-Y
4
J/B No.1
1J 1E
GAUGE
ABS & TRAC ECU

12 V

AM1
R/B
No.2
ALT
Ignition Switch
Brake Warning Light
C10 C17 BR-W IF1
9 1 15
B-W (Canada)
BR-W (USA)
1
Diode
2
R-W 10 LBL
A-20

B2 14
6
Brake Fluid Level Warning Switch
2
E6

Battery

RG7064