C1273

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: C1403,C1273,C1274,C1404: Rear Speed Sensor RH Malfunction
C1404 - Rear Speed Sensor LH Malfunction

DESCRIPTION

Refer to DTCs C1401 and C1402 C1401.





HINT
* DTCs C1403 and C1273 are for the rear speed sensor RH.
* DTCs C1404 and C1274 are for the rear speed sensor LH.

INSPECTION PROCEDURE

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

PROCEDURE

1. 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 the rear axle.

The installation nut is tightened properly.

Torque:

7.8 N*m (80 kgf*cm, 69 in.*lbf)

Text in Illustration





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

2. INSPECT REAR SPEED SENSOR TIP

(a) Remove the rear speed sensor Removal.

(b) Check the speed sensor tip.

OK:

No scratches, oil, or foreign matter on the sensor tip.

NOTICE:
If no damage to the speed sensor tip is found during this inspection, do not replace the speed sensor.

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

3. INSPECT REAR SPEED SENSOR ROTOR

(a) Remove the rear axle hub and bearing assembly Removal.

(b) Check the speed sensor rotor.

OK:

No scratches, oil, or foreign matter on the rotors.

HINT
The rear speed sensor rotor is incorporated into the rear axle hub and bearing assembly.

If the rear speed sensor rotor needs to be replaced, replace it together with the rear axle hub and bearing assembly.

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

4. 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) Turn the Techstream on.

(e) Enter the following menus: Chassis / ABS/VSC/TRAC / Data List.

ABS/VSC/TRAC





(f) 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 Operation Check.

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 -- REPLACE REAR SPEED SENSOR

OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

5. REPLACE REAR SPEED SENSOR

(a) Replace the rear speed sensor Removal.

NEXT -- Continue to next step.

6. RECONFIRM DTC

(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(b) Turn the ignition switch off.

(c) Start the engine.

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

(e) Check if the same DTC is output Reading and Clearing Diagnostic Trouble Codes.

Result





NG -- REPLACE REAR AXLE HUB AND BEARING ASSEMBLY Disassembly

OK -- END