Brake. Yaris. Ncp93, 131
Brake Control Dynamic Control Systems. Yaris. Ncp93, 131
CHECK REAR SPEED SENSOR INSTALLATION
READ VALUE USING TECHSTREAM (REAR SPEED SENSOR)
DTC C1403 Rear Speed Sensor RH Malfunction |
DTC C1273 Low Output Signal of Rear Speed Sensor RH (Test Mode DTC) |
DTC C1274 Low Output Signal of Rear Speed Sensor LH (Test Mode DTC) |
DTC C1404 Rear Speed Sensor LH Malfunction |
DESCRIPTION
Refer to DTCs C1401 and C1402 (YARIS_NCP93 RM000000XI90IWX_01.html).
| DTC Code | DTC Detection Condition | Trouble Area |
| C1403 C1404 | Any of the following is detected:
|
|
| C1273 C1274 | Detected only during Test Mode. |
|
- HINT:
- DTC C1403 and C1273 are for the rear speed sensor RH.
- DTC C1404 and C1274 are for the rear speed sensor LH.
INSPECTION PROCEDURE
- NOTICE:
- Disassembly of the speed sensor from the rear axle hub and bearing assembly is prohibited.
- Check the speed sensor signal after cleaning or replacement (YARIS_NCP93 RM000000XHT08IX.html).
| 1.CHECK REAR SPEED SENSOR INSTALLATION |
Turn the ignition switch off.
Check the speed sensor installation.
- OK:
- There is no clearance between the sensor and the rear axle hub.
- HINT:
- Because the rear axle hub and bearing assembly cannot be disassembled, if the rear speed sensor needs replacement, replace the rear axle hub and bearing assembly.
Text in Illustration *1 Rear Speed Sensor *a No clearance *b OK *c NG
 |
|
| ||||
| OK | |
| 2.READ VALUE USING TECHSTREAM (REAR SPEED SENSOR) |
Turn the ignition switch off.
Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Enter the following menus: Chassis / ABS/VSC/TRAC / Data List.
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) Vehicle stopped:
0 km/hWhen driving at constant speed: No large fluctuations RL Wheel Speed RL wheel speed sensor reading / min.: 0 km/h (0 mph), max.: 326 km/h (202 mph) Vehicle stopped:
0 km/hWhen driving at constant speed: No large fluctuations
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.
- 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).
- HINT:
- If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (YARIS_NCP93 RM000000XHN0AXX.html).
|
| ||||
| OK | ||
| ||