Dtc C1403 Rear Speed Sensor Rh Malfunction
Brake. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK SKID CONTROL SENSOR/REAR SPEED SENSOR INSTALLATION
CHECK REAR SPEED SENSOR TIP
CHECK REAR SPEED SENSOR ROTOR
READ VALUE USING INTELLIGENT TESTER (RR/RL WHEEL SPEED)
REPLACE REAR SPEED SENSOR
RECONFIRM DTC
DTC C1403 Rear Speed Sensor RH Malfunction |
DTC C1404 Rear Speed Sensor LH Malfunction |
DESCRIPTION
The speed sensor detects wheel speed and sends the appropriate signals to the skid control ECU. These signals are used for ABS/VSC/TRC control.Speed sensor rotors have rows of alternating N and S magnetic poles, and their magnetic fields change when the rotors turn.Each speed sensor detects that magnetic change and sends a pulse signal to the skid control ECU.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 (for 2WD) or for 30 seconds or more (for 4WD).
- 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 SKID CONTROL SENSOR/REAR SPEED SENSOR INSTALLATION |
for 2WD:
Check the skid control sensor installation.
- OK:
- There is no clearance between the sensor and the rear axle carrier.
for 4WD:
Check the rear speed sensor installation.
- OK:
- There is no clearance between the sensor and the rear axle carrier.
- The installation bolt is tightened properly.
- Torque:
- 8.5 N*m (87 kgf*cm, 75 in.*lbf)
- Result:
Result
| Proceed to
|
OK
| for 4WD
| A
|
for 2WD
| B
|
NG
| for 2WD
| C
|
for 4WD
| D
|
| 2.CHECK REAR SPEED SENSOR TIP |
Remove the rear speed sensor (RAV4_ACA30 RM000001XVL007X.html).
Check the speed sensor tip.
- OK:
- No scratches, oil, or foreign matter on the sensor tip.
- NOTICE:
- Check the speed sensor signal after cleaning or replacement (RAV4_ACA30 RM0000022CZ007X.html).
| | CLEAN OR REPLACE REAR SPEED SENSOR |
|
|
| 3.CHECK REAR SPEED SENSOR ROTOR |
Remove the rear axle hub and bearing assembly (RAV4_ACA30 RM00000227S005X.html).
Check the speed sensor rotor.
- OK:
- No scratches, oil, or foreign matter on the rotors.
- NOTICE:
- Check the speed sensor signal after cleaning or replacement (RAV4_ACA30 RM0000022CZ007X.html).
- HINT:
- If the rear speed sensor rotor needs to be replaced, replace it together with the rear axle hub and bearing assembly.
| | CLEAN OR REPLACE REAR SPEED SENSOR ROTOR |
|
|
| 4.READ VALUE USING INTELLIGENT TESTER (RR/RL WHEEL SPEED) |
for 4WD:
Install the rear speed sensor and rear axle hub and bearing assembly.
Connect the intelligent tester to the DLC3.
Start the engine.
Select the Data List mode on the intelligent tester (RAV4_ACA30 RM000000ONK01EX.html).
ABS/VSC/TRC:Tester Display
| Measurement Item/Range
| Normal Condition
| Diagnostic Note
|
RR Wheel Speed
| RR wheel speed sensor reading / min.: 0 km/h (0 mph), max.: 326.4 km/h (202.8 mph)
| Actual wheel speed
| Similar to speed indicated on the speedometer.
|
RL Wheel Speed
| RL wheel speed sensor reading / min.: 0 km/h (0 mph), max.: 326.4 km/h (202.8 mph)
| Actual wheel speed
| Similar to speed indicated on the speedometer.
|
Check that there is no difference between the speed value output from the speed sensor displayed on the intelligent tester 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 (RAV4_ACA30 RM0000020M9001X.html).
- OK:
- The speed value output from the speed sensor displayed on the intelligent tester is the same as the actual vehicle speed measured using a speedometer tester (calibrated chassis dynamometer).
- Result:
Result
| Proceed to
|
NG
| for 4WD
| A
|
for 2WD
| B
|
OK
| C
|
- NOTICE:
- Check the speed sensor signal after replacement (RAV4_ACA30 RM0000022CZ007X.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.
- If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (RAV4_ACA30 RM000000OS701UX.html).
| 5.REPLACE REAR SPEED SENSOR |
Turn the ignition switch off.
Replace the rear speed sensor (RAV4_ACA30 RM000001XVL007X.html).
- NOTICE:
- Check the speed sensor signal after replacement (RAV4_ACA30 RM0000022CZ007X.html).
Clear the DTCs (RAV4_ACA30 RM000000ONJ027X.html).
Start the engine.
Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.
Check if the same DTC is output (RAV4_ACA30 RM000000ONJ027X.html).
- Result:
Result
| Proceed to
|
DTCs (C1403 and C1404) are not output.
| A
|
DTCs (C1403 and/or C1404) are output.
| B
|
- NOTICE:
- Check the speed sensor signal after replacement (RAV4_ACA30 RM0000022CZ007X.html).
- HINT:
- If the rear speed sensor rotor needs to be replaced, replace it together with the rear axle hub and bearing assembly.
- If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (RAV4_ACA30 RM000000OS701UX.html).
