C1146

C1113, C1145, C1146 YAW RATE/SIDE/DECEL G SENSOR

DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. PRECONDITIONING

If "DTC CONFIRMATION PROCEDURE" has been previously conducted, always turn power 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 power switch OFF ON.

CAUTION:
- Be sure to wait of 10 seconds after turning power switch OFF or ON.
- Set the vehicle to READY.
2.Repeat step 1 two or more times.
3.Perform self-diagnosis for "ABS".
Is DTC "C1113" "C1145" or "C1146" detected?
YES- Proceed to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY SYSTEM

Check the ABS actuator and electric unit (control unit) power supply system. Refer to "Diagnosis Procedure" Power Supply And Ground Circuit.
Is the inspection result normal?
YES- GO TO 2.
NO- Repair or replace error-detected parts.

2. CHECK CONNECTOR

1.Turn the power switch OFF.
2.Check the ABS actuator and electric unit (control unit) harness connector for disconnection or looseness.
3.Check the yaw rate/side/decel G sensor harness connector for disconnection or looseness.
Is the inspection result normal?
YES- GO TO 4.
NO- Repair or replace error-detected parts, securely lock the connector, and GO TO 3.

3. PERFORM SELF-DIAGNOSIS

With CONSULT
1.Turn the power switch OFF ON.

CAUTION:
- Be sure to wait of 10 seconds after turning power switch OFF or ON.
- Set the vehicle to READY.
2.Repeat step 1 two or more times.
3.Perform self-diagnosis for "ABS".
Is DTC"C1113", "C1145" or "C1146" detected?
YES- GO TO 4.
NO- INSPECTION END

4. CHECK YAW RATE/SIDE/DECEL G SENSOR POWER SUPPLY CIRCUIT

1.Turn power switch OFF.
2.Disconnect ABS actuator and electric unit (control unit) harness connector.
3.Disconnect yaw rate/side/decel G sensor harness connector.
4.Check the continuity between yaw rate/side/decel G sensor harness connector and ABS actuator and electric unit (control unit) harness connector.





Is the inspection result normal?
YES- GO TO 5.
NO- Repair or replace error-detected parts.

5. CHECK YAW RATE/SIDE/DECEL G SENSOR GROUND CIRCUIT

Check the continuity between yaw rate/side/decel G sensor harness connector and ABS actuator and electric unit (control unit) harness connector.





Is the inspection result normal?
YES- GO TO 6.
NO- Repair or replace error-detected parts.

6. CHECK YAW RATE/SIDE/DECEL G SENSOR SIGNAL CIRCUIT

Check the continuity between yaw rate/side/decel G sensor harness connector and ABS actuator and electric unit (control unit) harness connector.





Is the inspection result normal?
YES- GO TO 7.
NO- Repair or replace error-detected parts.

7. CHECK YAW RATE/SIDE/DECEL G SENSOR CIRCUIT

Check the continuity between each terminals of yaw rate/side/decel G sensor harness connector.





Is the inspection result normal?
YES- GO TO 8.
NO- Repair or replace error-detected parts.

8. CHECK YAW RATE/SIDE/DECEL G SENSOR (1)

With CONSULT
1.Connect yaw rate/side/decel G sensor harness connector.
2.Connect ABS actuator and electric unit (control unit) harness connector.
3.Turn the power switch ON.

CAUTION:
Never set the vehicle to READY.
4.Select "ABS", "DATA MONITOR" and "DECEL G-SEN" in order.





5.Move yaw rate/side/decel G sensor as shown in the figure to check the output of before and after moving the sensor.





Is the inspection result normal?
YES- GO TO 9.
NO- Replace yaw rate/side/decel G sensor. Refer to BRC153, "Removal and Installation".

9. CHECK YAW RATE/SIDE/DECEL G SENSOR (2)

1.Turn the power switch OFF.
2.Connect following terminals between yaw rate/side/decel G sensor and harness connector (test harness).





3.Turn the power switch ON.

CAUTION:
Never set the vehicle to READY.
4.Check the voltage between yaw rate/side/decel G sensor harness connector terminals.

CAUTION:
Never short out the terminals while measuring voltages.





Is the inspection result normal?
YES- Replace ABS actuator end electric unit (control unit). Refer to "Removal and Installation" Removal And Installation.
NO- Replace yaw rate/side/decel G sensor. Refer to "Removal and Installation" Removal And Installation.