DTC C1246/46 Master Cylinder Pressure Sensor Malfunction |
DTC C1281/81 Master Cylinder Pressure Sensor Output Malfunction (Test Mode DTC) |
for Preparation Click here
DESCRIPTION
Master cylinder pressure sensor is connected to the skid control ECU in the brake actuator assembly.DTC C1281/81 can be deleted when the master cylinder pressure sensor sends a master cylinder pressure signal or the Test Mode ends. DTC C1281/81 is output only in the Test Mode.
DTC No. | DTC Detection Condition | Trouble Area |
C1246/46 | When any of the following is detected:
|
|
INSPECTION PROCEDURE
- NOTICE:
- When replacing the brake actuator assembly, perform zero point calibration (Click here).
1.CHECK STOP LIGHT OPERATION |
Check that the stop light comes on when the brake pedal is depressed, and goes off when the brake pedal is released.
- OK:
Condition Illumination Condition Brake pedal depressed ON Brake pedal released OFF
|
| ||||
OK | |
2.READ VALUE USING INTELLIGENT TESTER (MASTER CYLINDER PRESSURE SENSOR) |
Connect the intelligent tester to the DLC3.
Start the engine.
Select the Data List mode on the intelligent tester.
ABS / VSC / TRC: Item (Display) Measurement Item / Range (Display) Normal Condition Master Cylinder Sensor Master cylinder pressure sensor 1 reading / min.: 0 V, max.: 5 V When brake pedal is released: 0.3 to 0.5 V
Check that the brake fluid pressure value of the master cylinder pressure sensor observed on the intelligent tester changes when the brake pedal is depressed.
- OK:
- When the pedal is depressed, voltage displayed on the intelligent tester increases.
|
| ||||
OK | |
3.READ VALUE USING INTELLIGENT TESTER (STOP LIGHT SWITCH) |
Select the Data List mode on the intelligent tester.
ABS / VSC / TRC: Item (Display) Measurement Item / Range (Display) Normal Condition Stop Lamp SW Stop light switch / ON or OFF ON: Brake pedal depressed
OFF: Brake pedal released
Check that the stop light condition observed on the intelligent tester changes when the brake pedal is depressed.
- OK:
- When the brake pedal is depressed, the intelligent tester displays "ON".
|
| ||||
OK | |
4.RECONFIRM DTC |
Turn the ignition switch off.
Clear the DTC (Click here).
Start the engine.
At a speed of 18 mph (30 km/h) or more, drive the vehicle and perform braking test (decelerate the vehicle by depressing the brake pedal).
Check if the same DTC is recorded (Click here).
- Result:
Condition Proceed to DTC (C1246/46) is not output A DTC (C1246/46) is output B
|
| ||||
A | ||
|