C1246 · blink 46 – Master Cylinder Pressure Sensor Circuit

System: ABS with BA & EBD
Dashboard light: ABS warning
Check-engine blink code: 46
Applies to: All E120 with ABS (BA & EBD)
Description: Master Cylinder Pressure Sensor Circuit
Detection / symptoms: Detection: Either of the following 1., 2., 3., or 4. is detected: 1. At the vehicle speed of 7 km/h (4 mph) or more, master cylinder pressure sensor does not change continues for 30 sec. 2. Interference occurs 7 times or more for 5 sec. 3. ECU terminal STP is OFF, and the condition that master cylinder pressure sensor voltage becomes more than 0.86 V or less than 0.3 V continues for 5 sec. or more. 4. Master cylinder pressure sensor circuit is open or short for 1.2 sec. or more.
Possible causes: Master cylinder pressure sensor; Master cylinder pressure sensor circuit
What to check: Workshop check order (RM821E): READ VALUE OF ACTUATOR ASSY, BRAKE -> INSPECT ACTUATOR ASSY, BRAKE
Confidence: high (official Toyota RM821E)

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