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DTC C1953, C1954 [DSC]

id040220875300

DTC | C1953, C1954 | Brake fluid pressure sensor
DETECTION CONDITION | • C1953: - Monitor voltage of the brake fluid pressure sensor is detected at 4.5 V or more, or 0.5 V or less - Monitor voltage difference of 0.4 V or more within 1 cycle is detected 8 times in 1 s • C1954: - Brake fluid pressure sensor 0-point correction value is 0.3 V or less, or 0.9 V or more - Output voltage value from brake fluid pressure sensor does not increase above 0.06 V - Difference between estimated brake pressure value and output value of brake fluid pressure sensor exceeds specification
POSSIBLE CAUSE | • Malfunction of brake fluid pressure sensor

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT BRAKE FLUID PRESSURE SENSOR • Inspect PID/DATA in brake fluid pressure sensor. • Inspect MCYLIP item using WDS or equivalent. • Is pressure value change between 0-22.5 MPa when brake pedal is pressed? | Yes | Go to next step.
No | Replace DSC HU/CM, then go to next step.
2 | VERIFY TROUBLESHOOTING COMPLETED • Clear DTC from memory. (See Clearing DTCs Procedures.) • Is the same DTC present? | Yes | Replace DSC HU/CM, then go to next step.
No | Go to next step.
3 | VERIFY THAT NO OTHER DTCS ARE PRESENT • Are any other DTCs output? | Yes | Go to the applicable DTC inspection. (See DTC Table.)
No | DTC troubleshooting completed.