C1278

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: C1415, C1277, C1278, C1416: Rear Speed Sensor RH Output Malfunction
C1416 - Rear Speed Sensor LH Output Malfunction

DESCRIPTION

Refer to DTCs C1403 and C1404 C1403.

HINT
* DTC C1415 and C1277 are for the rear speed sensor RH.
* DTC C1416 and C1278 are for the rear speed sensor LH.

WIRING DIAGRAM

Refer to DTCs C1403 and C1404 C1403.

INSPECTION PROCEDURE

NOTICE:
* When replacing the brake actuator assembly, perform zero point calibration Programming and Relearning.
* Disassembly of the rear speed sensor from the rear axle hub and bearing assembly is prohibited.
* Check the speed sensor signal after replacement Test Mode Procedure.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION) C1407

NG -- INSPECT SKID CONTROL SENSOR WIRE
OK -- Continue to next step.

2. READ VALUE USING TECHSTREAM (REAR SPEED SENSOR) C1403

NG -- CHECK REAR SPEED SENSOR INSTALLATION
OK -- Continue to next step.

3. PERFORM TEST MODE (SIGNAL CHECK)

(a) Turn the ignition switch off.

(b) Perform the sensor check in the Test Mode procedure Test Mode Procedure.

OK:

All Test Mode DTCs are cleared.

NG -- CHECK REAR SPEED SENSOR INSTALLATION
OK -- Continue to next step.

4. RECONFIRM DTC

(a) Turn the ignition switch off.

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

(c) Start the engine.

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

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

Result

HINT
If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step Problem Symptoms Table.

B -- REPLACE REAR AXLE HUB AND BEARING ASSEMBLY

A -- CHECK FOR INTERMITTENT PROBLEMS How To Proceed With Troubleshooting

5. CHECK REAR SPEED SENSOR INSTALLATION C1403

NG -- REPLACE REAR AXLE HUB AND BEARING ASSEMBLY Removal
OK -- Continue to next step.

6. INSPECT SKID CONTROL SENSOR WIRE C1407

NG -- REPLACE SKID CONTROL SENSOR WIRE
OK -- Continue to next step.

7. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - REAR SPEED SENSOR) C1407

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

8. INSPECT SKID CONTROL ECU (SENSOR INPUT) C1407

NG -- REPLACE BRAKE ACTUATOR ASSEMBLY Removal
OK -- Continue to next step.

9. RECONFIRM DTC

(a) Turn the ignition switch off.

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

(c) Start the engine.

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

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

Result

HINT
If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step Problem Symptoms Table.

B -- REPLACE REAR AXLE HUB AND BEARING ASSEMBLY

A -- CHECK FOR INTERMITTENT PROBLEMS How To Proceed With Troubleshooting

10. REPLACE REAR AXLE HUB AND BEARING ASSEMBLY

(a) Turn the ignition switch off.

(b) Replace the rear speed sensor and rear axle hub and bearing assembly Removal.

NOTICE:
Check the speed sensor signal after replacement 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.

NEXT -- Continue to next step.

11. RECONFIRM DTC

(a) Turn the ignition switch off.

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

(c) Start the engine.

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

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

Result