C1407

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: C1407, C1408: Open or Short in Rear Speed Sensor RH Circuit
C1408 - Open or Short in Rear Speed Sensor LH Circuit

DESCRIPTION

Refer to DTCs C1403 and C1404 C1403.





HINT
* DTC C1407 is for the rear speed sensor RH.
* DTC C1408 is 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 calibration Programming and Relearning.
* Do not remove the rear speed sensor from the rear axle hub and bearing assembly.

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.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)

(a) Using the Techstream, check for any momentary interruption in the wire harness and connector corresponding to the DTC Check for Intermittent Problems.

ABS/VSC/TRAC





OK:

Normal (there are no momentary interruptions).

HINT
Perform the above inspection before removing the sensor and disconnecting the connector.

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

2. READ VALUE USING TECHSTREAM (RR/RL WHEEL SPEED) C1403

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

3. RECONFIRM DTC

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

(b) Turn the ignition switch off.

(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 output Reading and Clearing Diagnostic Trouble Codes.

Result





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

B -- REPLACE BRAKE ACTUATOR ASSEMBLY Removal

A -- CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) How To Proceed With Troubleshooting

4. INSPECT SKID CONTROL SENSOR WIRE

(a) Make sure that there is no looseness in the locking part and connecting part of the connectors.

(b) Remove the rear speed sensor wire Removal.

(c) Measure the resistance according to the value(s) in the table below.





Standard Resistance:

for RH





for LH





Text in illustration





NOTICE:
Check the speed sensor signal after replacement Test Mode Procedure.

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

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

(a) Make sure that there is no looseness in the locking part and connecting part of the connectors.

(b) Disconnect the skid control ECU connector and the rear speed sensor connectors.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

for RH





for LH





NOTICE:
Check the speed sensor signal after replacement Test Mode Procedure.

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

6. INSPECT SKID CONTROL ECU (SENSOR INPUT)

(a) Disconnect the rear speed sensor connector.





(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

for RH
for LH










Text in illustration





NOTICE:
Check the speed sensor signal after replacement Test Mode Procedure.

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

NG -- REPLACE BRAKE ACTUATOR ASSEMBLY Removal

OK -- REPLACE REAR AXLE HUB AND BEARING ASSEMBLY (REAR SPEED SENSOR, SENSOR ROTOR) Removal