Vehicle Stability Control System (Vacuum Brake Booster)

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM (for Vacuum Brake Booster): C0210/33,C0215/34,C1273/73,C1274/74: Rear Speed Sensor RH Circuit
C1274/74 - Low Output Signal of Rear Speed Sensor LH (Test Mode DTC)

DESCRIPTION

Refer to DTC C0200/31 Front Speed Sensor RH Circuit - Vehicle Stability Control System (for Vacuum Brake Booster))





HINT
* DTCs C0210/33 and C1273/73 are for the rear speed sensor RH.
* DTCs C0215/34 and C1274/74 are for the rear speed sensor LH.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* When replacing the brake actuator assembly, perform zero point calibration Vehicle Stability Control System (for Vacuum Brake Booster).
* Check the speed sensor signal in test mode after cleaning or replacement Test Mode Procedure.

PROCEDURE

1. READ VALUE USING TECHSTREAM (REAR SPEED SENSOR)

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Start the engine.

(d) Select the Data List mode on the Techstream Data List / Active Test.

ABS/VSC/TRAC:





(e) Check that there is no difference between the speed value output from the speed sensor displayed on the Techstream and the speed value displayed on the speedometer when driving the vehicle.

HINT
Factors that affect the indicated vehicle speed include tire size, tire inflation, and tire wear. The speed indicated on the speedometer has an allowable margin of error. This can be tested using a speedometer tester (calibrated chassis dynamometer). For details about testing and the margin of error, see the reference chart On-Vehicle inspection.

OK:

The speed value output from the speed sensor displayed on the Techstream is the same as the actual vehicle speed measured using a speedometer tester (calibrated chassis dynamometer).

NG -- CHECK REAR SPEED SENSOR INSTALLATION
OK -- Continue to next step.

2. PERFORM TEST MODE (SIGNAL CHECK)

(a) Perform sensor check in Test Mode procedure Test Mode Procedure.

OK:

All Test Mode DTCs are erased.

NG -- CHECK REAR SPEED SENSOR INSTALLATION
OK -- Continue to next step.

3. RECONFIRM DTC

(a) Clear the DTC Vehicle Stability Control System (for Vacuum Brake Booster).

(b) Start the engine.

(c) Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.

(d) Check if the same DTC is recorded Vehicle Stability Control System (for Vacuum Brake Booster).

Result





B -- REPLACE REAR SPEED SENSOR

A -- CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) How To Proceed With Troubleshooting

4. CHECK REAR SPEED SENSOR INSTALLATION

(a) Turn the ignition switch off.





(b) Check the speed sensor installation.

OK:

There is no clearance between the sensor and rear axle carrier.

Torque : 8.0 Nm (82 kgf-cm, 71 in-lbf)

NG -- INSTALL REAR SPEED SENSOR CORRECTLY Installation
OK -- Continue to next step.

5. CHECK REAR SPEED SENSOR

(a) Visually check the speed sensor for deformation and damage.

OK:

No deformation or damage.

There is no gap between the sensor and rear axle carrier.

NG -- REPLACE REAR SPEED SENSOR Removal
OK -- Continue to next step.

6. CHECK REAR SPEED SENSOR TIP

(a) Remove the speed sensor Removal.

(b) Check the sensor tip.

OK:

No scratches or foreign matter on the sensor tip.

NG -- CLEAN OR REPLACE SPEED SENSOR
OK -- Continue to next step.

7. CHECK HARNESS AND CONNECTOR (SPEED SENSOR WIRE)

(a) Disconnect the speed sensor wire.





(b) Measure the resistance according to the value(s) in the table below.

Standard resistance:

for RH
for LH










NOTICE:
Check the speed sensor signal after replacement Test Mode Procedure.

NG -- REPLACE SPEED SENSOR WIRE
OK -- Continue to next step.

8. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - REAR SPEED SENSOR)

(a) Reconnect the speed sensor wire.





(b) Disconnect the skid control ECU connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard resistance:

for RH
for LH










NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

9. INSPECT SKID CONTROL ECU (SENSOR INPUT)

(a) Reconnect the skid control ECU connector.





(b) Turn the ignition switch to ON.

(c) Measure the voltage according to the value(s) in the table below.

Standard voltage:

for RH
for LH










NG -- REPLACE BRAKE ACTUATOR ASSEMBLY Removal
OK -- Continue to next step.

10. RECONFIRM DTC

(a) Clear the DTC Vehicle Stability Control System (for Vacuum Brake Booster).

(b) Start the engine.

(c) Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.

(d) Check if the same DTC is recorded Vehicle Stability Control System (for Vacuum Brake Booster).

Result





HINT
If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step Problem Symptoms Table.

B -- CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) How To Proceed With Troubleshooting
A -- Continue to next step.

11. REPLACE REAR SPEED SENSOR

(a) Replace the rear speed sensor Removal.

NEXT -- Continue to next step.

12. RECONFIRM DTC

(a) Clear the DTC(s) Vehicle Stability Control System (for Vacuum Brake Booster).

(b) Start the engine.

(c) Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.

(d) Check if the same DTC(s) is output Vehicle Stability Control System (for Vacuum Brake Booster).

Result





B -- END

A -- REPLACE BRAKE ACTUATOR ASSEMBLY Removal