C1145
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 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 to ON.
2.Perform self-diagnosis for "ABS".
Is DTC "C1145" or "C1146" detected?
YES- Proceed to diagnosis procedure. Refer to "Diagnosis Procedure" .
NO- INSPECTION END
Diagnosis Procedure
CAUTION:
- A malfunction in yaw rate/side/decel G sensor system may be detected when the vehicle sharply turns during a spin turn, acceleration turn or drift driving while VDC function is OFF (VDC OFF indicator lamp is in ON status). This is not a malfunction if the status returns to normal after engine is started again. In that case, erase self-diagnosis result memory using CONSULT.
- When the engine is in running status and the vehicle is on a turntable at the entrance of parking lot or on a moving unit, VDC warning lamp may turn ON and "ABS" self-diagnosis may display "YAW
RATE SENSOR". In this case, yaw rate sensor is not malfunctioning. The status returns to normal when the vehicle is left from the turntable or moving unit and the engine is started again. In that case, erase self-diagnosis result memory using CONSULT.
1. CHECK YAW RATE/SIDE/DECEL G SENSOR MOUNTING CONDITION
Check yaw rate/side/decel G sensor mounting condition. Refer to "Exploded View" Exploded View.
Is the inspection result normal?
YES- GO TO 2.
NO- Repair or replace error-detected parts.
2. CHECK YAW RATE/SIDE/DECEL G SENSOR POWER SUPPLY
1.Turn the ignition switch OFF.
2.Disconnect yaw rate/side/decel G sensor harness connector.
3.Check voltage between yaw rate/side/decel G sensor harness connector and ground.
4.Turn the ignition switch ON.
CAUTION:
Never start engine.
5.Check voltage between yaw rate/side/decel G sensor harness connector and ground.
Is the inspection result normal?
YES- GO TO 4.
NO- GO TO 3.
3. CHECK YAW RATE/SIDE/DECEL G SENSOR POWER SUPPLY CIRCUIT
1.Turn the ignition switch OFF.
2.Check 10A fuse (#57).
3.Disconnect IPDM E/R harness connector.
4.Check continuity between yaw rate/side/decel G sensor harness connector and IPDM E/R harness connector.
5.Check continuity between yaw rate/side/decel G sensor harness connector and ground.
Is the inspection result normal?
YES- Perform trouble diagnosis for ignition power supply. Refer to "Wiring Diagram IGNITION POWER SUPPLY -" Ignition Power Supply.
NO- Repair or replace error-detected parts.
4. CHECK YAW RATE/SIDE/DECEL G SENSOR GROUND CIRCUIT
1.Turn the ignition switch OFF.
2.Check continuity between yaw rate/side/decel G sensor harness connector and ground.
Is the inspection result normal?
YES- GO TO 5.
NO- Repair or replace error-detected parts.
5. CHECK COMMUNICATION LINE (1)
1.Disconnect ABS actuator and electric unit (control unit) harness connector.
2.Check 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 COMMUNICATION LINE (2)
1.Connect ABS actuator and electric unit (control unit) harness connector.
2.Check resistance between yaw rate/side/decel G sensor harness connector terminals.
Is the inspection result normal?
YES- GO TO 7.
NO- Replace ABS actuator and electric unit (control unit). Refer to "Removal and Installation" Service and Repair.
7. CHECK COMMUNICATION LINE (3)
1.Disconnect ABS actuator and electric unit (control unit) harness connector.
2.Check continuity between yaw rate/side/decel G sensor harness connector and ground.
Is the inspection result normal?
YES- GO TO 8.
NO- Repair or replace error-detected parts.
8. CHECK TERMINAL
- Check ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with harness connector.
- Check yaw rate/side/decel G sensor pin terminals for damage or loose connection with harness connector.
- Check IPDM E/R pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES- GO TO 9.
NO- Repair or replace error-detected parts.
9. REPLACE YAW RATE/SIDE/DECEL G SENSOR
With CONSULT
1.Connect ABS actuator and electric unit (control unit) harness connector.
2.Connect IPDM E/R harness connector.
3.Replace yaw rate/side/decel G sensor. Refer to "Removal and Installation" Removal and Installation.
4.Erase Self-diagnosis result for "ABS".
5.Turn the ignition switch OFF.
6.Turn the ignition switch ON.
CAUTION:
Never start engine.
7.Perform self-diagnosis for "ABS".
Is DTC "C1145" or "C1146" detected?
YES- Replace ABS actuator and electric unit (control unit). Refer to "Removal and Installation" Service and Repair.
NO- INSPECTION END