Dtc C1403 Rear Speed Sensor Rh Malfunction
Brake. Corolla. Zre142 Aze141
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK REAR SPEED SENSOR INSTALLATION
READ VALUE USING TECHSTREAM (REAR SPEED SENSOR)
DTC C1403 Rear Speed Sensor RH Malfunction |
DTC C1404 Rear Speed Sensor LH Malfunction |
DESCRIPTION
The speed sensor detects the wheel speed and sends the appropriate signals to the skid control ECU. These signals are used for the ABS control system.Speed sensor rotors have rows of alternating N and S magnetic poles. The hall IC type speed sensor uses the frequency of output pulses to detect the vehicle speed. Because the sensor outputs digital pulses, it can detect vehicle speeds even when the vehicle is nearly stationary.DTC Code
| DTC Detection Condition
| Trouble Area
|
C1403
C1404
| Any of the following is detected:
- At a vehicle speed 10 km/h (6 mph) or more, output voltage from one of the speed sensors is less than that from the other sensors for 15 seconds or more.
- At a vehicle speed less than 10 km/h (6 mph), output from one of the speed sensors is 0 km/h (0 mph) for 1 second or more.
- At a vehicle speed less than 10 km/h (6 mph), outputs from both rear speed sensors are 0 km/h (0 mph) for a cumulative time of 200 seconds.
| - Rear speed sensor RH/LH
- Speed sensor rotor
|
- HINT:
- DTC C1403 is for the rear speed sensor RH.
- DTC C1404 is for the rear speed sensor LH.
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.CHECK REAR SPEED SENSOR INSTALLATION |
Check the speed sensor installation.
- OK:
- There is no clearance between the sensor and the rear axle carrier.
| 2.READ VALUE USING TECHSTREAM (REAR SPEED SENSOR) |
Connect the Techstream to the DLC3.
Start the engine.
Select the Data List on the Techstream (COROLLA_ZRE142 RM000000XHW0BYX.html).
ABS/VSC/TRACTester 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
|
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 (COROLLA_ZRE142 RM0000014WB08AX.html).
- 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).
- NOTICE:
- Check the speed sensor signal after replacement (COROLLA_ZRE142 RM000000XHT0ATX.html).
- 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.
- If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step (COROLLA_ZRE142 RM000000XHN0DUX.html).
| | REPLACE REAR SPEED SENSOR AND REAR SPEED SENSOR ROTOR |
|
|
