DTC C1246/46 Master Cylinder Pressure Sensor Malfunction: Description
WARNING: This page is about a different car, the 2007 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.
DTC DETECTION CONDITION CHART
| DTC No. |
DTC Detection Condition |
Trouble Area |
| C1246/46 |
One of the following conditions is met:
- At vehicle speed of 7 km/h (4 mph) or more, ECU terminal PMC voltage becomes more than 0.86 V and condition that 0.01 V or less does not change continues for 30 sec.
- Interference occurs to ECU terminal PMC 7 times or more for 5 sec.
- ECU terminal STP is OFF, and condition that terminal PMC voltage becomes more than 0.86 V or less than 0.3 V continues for 5 sec. or more
- ECU terminal IG1 voltage is 9.5 V to 17.0 V, and condition that terminal VCM voltage is out of range from 4.4 V to 5.6 V continues for 1.2 sec. or more
- ECU terminal VCM voltage is 4.4 V to 5.6 V, and condition that terminal PMC voltage is out of range from 0.14 V to 4.85 V continues for 1.2 sec. or more
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- Brake actuator (master cylinder pressure sensor)
- Master cylinder pressure sensor circuit
- Skid control ECU
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