DTC C1403: Rear Speed Sensor RH Malfunction; DTC C1404: Rear Speed Sensor LH Malfunction: Procedure

1. Check the speed sensor installation. Refer to INSTALLATION .
   Fig 1: View Of Proper Rear Speed Sensor Installation

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK

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

NG → See step   4 

OK: Go to next step 

1. Install the rear speed sensor and the rear speed sensor rotor.
2. Connect the Techstream to the DLC3.
3. Start the engine.
4. Select the Data List on the Techstream. Refer to DATA LIST / ACTIVE TEST .
   ABS / VSC / TRAC
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   RR Wheel Speed	RR wheel speed sensor reading / min.: 0 km/h (0 mph), max.: 326 km/h (202 mph)	Actual wheel speed	Similar speed as indicated on speedometer
   RL Wheel Speed	RL wheel speed sensor reading / min.: 0 km/h (0 mph), max.: 326 km/h (202 mph)	Actual wheel speed	Similar speed as indicated on speedometer

5. Check that there is no difference between the speed value output from the speed sensor displayed on 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. Refer to ON-VEHICLE INSPECTION .

   OK

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

   NOTE:

   Check the speed sensor signal after replacement. Refer to TEST MODE PROCEDURE .

   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 with rear speed sensor. Refer to REMOVAL .

   • If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step. Refer to PROBLEM SYMPTOMS TABLE .

NG → See step   5 

OK → See step   3