C1142

C1142 PRESS SENSOR

DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. PRECONDITIONING

If "DTC CONFIRMATION PROCEDURE" has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.
- GO TO 2.

2. CHECK DTC DETECTION

With CONSULT
1.Turn the ignition switch OFF -> ON.

CAUTION:
- Be sure to wait of 10 seconds after turning ignition switch OFF or ON.
- Set the vehicle to READY/Start the engine.
2.Repeat step 1 two or more times.
3.Perform self-diagnosis for "ABS".
Is DTC "C1142" detected?
YES- Proceed to .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK CONNECTOR

1.Turn the ignition switch OFF
2.Check ABS actuator and electric unit (control unit) harness connector for disconnection or looseness.
3.Check master cylinder pressure sensor2 harness connector for disconnection or looseness.
Is the inspection result normal?
YES- GO TO 3.
NO- Repair or replace error-detected parts, securely lock the connector, and GO TO 2.

2. PERFORM SELF-DIAGNOSIS (1)

1.Turn the ignition switch OFF -> ON.

CAUTION:
- Be sure to wait of 10 seconds after turning ignition switch OFF or ON.
- Set the vehicle to READY/Start the engine.
2.Repeat step 1 two or more times.
3.Perform self-diagnosis for "ABS".
Is DTC"C1142" detected?
YES- GO TO 3.
NO- INSPECTION END

3. CHECK MASTER CYLINDER PRESSURE SENSOR2 CIRCUIT

1.Turn the ignition switch OFF
2.Disconnect ABS actuator and electric unit (control unit) harness connector.
3.Disconnect master cylinder pressure sensor2 harness connector.
4.Check continuity between master cylinder pressure sensor2 harness connector and ABS actuator and electric unit (control unit) harness connector.





Is the inspection result normal?
YES- GO TO 4.
NO- Repair or replace error-detected parts.

4. CHECK MASTER CYLINDER PRESSURE SENSOR2 POWER SUPPLY

1.Connect ABS actuator and electric unit (control unit) harness connector.
2.Turn the ignition switch ON.

CAUTION:
Never set the vehicle to READY/Never start the engine.
3.Check voltage master cylinder pressure sensor2 harness connector terminals.





Is the inspection result normal?
YES- GO TO 5.
NO- Replace ABS actuator and electric unit (control unit). Removal and Installation.

5. CHECK DATA MONITOR

With CONSULT
1.Turn the ignition switch OFF.
2.Connect master cylinder pressure sensor2 harness connector.
3."ABS", "DATA MONITOR" and " PRESSURE SENSOR" according to this order.
4.Check that the indication changes with the depth of pedal depression. Pinout Values and Diagnostic Parameters.
Is the inspection result normal?
YES- GO TO 6.
NO- GO TO 7.

6. PERFORM SELF-DIAGNOSIS (2)

1.Turn the ignition switch OFF -> ON.

CAUTION:
- Be sure to wait of 10 seconds after turning ignition switch OFF or ON.
- Set the vehicle to READY/Start the engine.
2.Repeat step 1 two or more times.
3.Perform self-diagnosis for "ABS".
Is DTC"C1142" detected?
YES- Replace ABS actuator and electric unit (control unit). Removal and Installation.
NO- INSPECTION END

7. CHECK MASTER CYLINDER PRESSURE SENSOR2

1.Turn the ignition switch OFF.
2.Connect following terminals between master cylinder pressure sensor2 and harness connector (test harness).





3.Turn the ignition switch ON.

CAUTION:
Never set the vehicle to READY/Never start the engine.
4.Check that the voltage between master cylinder pressure sensor2 harness connectors changes with the depth of pedal depression.

CAUTION:
Never short out the terminals while measuring voltages.





Is the inspection result normal?
YES- Replace ABS actuator end electric unit (control unit). Removal and Installation.
NO- Replace master cylinder pressure sensor2. Removal and Installation.