Up to 08/2009
BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: C1413,C1414: Front Speed Sensor RH Output Malfunction
DESCRIPTION
The speed sensor detects wheel speed and sends the appropriate signals to the skid control ECU. These signals are used for ABS control.
Speed sensor rotors have 48 serrations 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.
HINT
- DTC C1413 is for the front speed sensor RH.
- DTC C1414 is for the front speed sensor LH.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
When replacing the brake actuator assembly, perform zero point calibration and store system information Programming and Relearning.
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:
There are no momentary interruptions.
HINT
Perform the above inspection before removing the sensor and connector.
NG -- CHECK FRONT SPEED SENSOR INSTALLATION
OK -- Continue to next step.
2. READ VALUE USING TECHSTREAM (FRONT SPEED SENSOR)
(a) Turn the engine switch off.
(b) Connect the Techstream to the DLC3.
(c) Start the engine.
(d) Select the Data List on the Techstream Data List / Active Test.
ABS/VSC/TRAC
(e) Check that the speed value output from the speed sensor displayed on the Techstream.
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 Problem Symptoms Table.
OK:
The speed value output from the speed sensor displayed on the Techstream is the similar speed as indicated on the speedometer.
NG -- CHECK FRONT SPEED SENSOR INSTALLATION
OK -- Continue to next step.
3. RECONFIRM DTC
(a) Turn the engine 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 Problem Symptoms Table, refer back to the table and proceed to the next step Problem Symptoms Table.
B -- REPLACE BRAKE ACTUATOR ASSEMBLY Removal
A -- CHECK FOR INTERMITTENT PROBLEMS How To Proceed With Troubleshooting
4. CHECK FRONT SPEED SENSOR INSTALLATION
(a) Turn the engine switch off.
(b) Check the speed sensor installation.
OK:
There is no clearance between the sensor and the front steering knuckle.
The installation bolt is tightened properly.
Torque
8.0 N*m (82 kgf*cm, 71 in.*lbf)
NG -- INSTALL FRONT SPEED SENSOR CORRECTLY
OK -- Continue to next step.
5. CHECK FRONT SPEED SENSOR TIP
(a) Remove the front speed sensor Removal.
(b) 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 Test Mode Procedure.
NG -- CLEAN OR REPLACE FRONT SPEED SENSOR
OK -- Continue to next step.
6. CHECK FRONT SPEED SENSOR ROTOR
(a) Remove the front speed sensor rotor Removal.
(b) Check the speed sensor rotor.
OK:
No scratches, oil, or foreign matter on the rotor.
NOTICE:
Check the speed sensor signal after cleaning or replacement Test Mode Procedure.
HINT
If the front speed sensor rotor needs to be replaced, replace it together with the front drive outboard joint shaft assembly.
NG -- CLEAN OR REPLACE FRONT SPEED SENSOR ROTOR
OK -- Continue to next step.
7. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - FRONT SPEED SENSOR)
(a) Install the front speed sensor and the front speed sensor rotor.
(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.
(c) Disconnect the skid control ECU connector and the front speed sensor connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for RH
for LH
Text in Illustration
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
8. INSPECT SKID CONTROL ECU (SENSOR INPUT)
(a) Reconnect the skid control ECU connector.
(b) Turn the engine switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
for RH
for LH
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 step Problem Symptoms Table.
Text in Illustration
NG -- REPLACE BRAKE ACTUATOR ASSEMBLY Removal
OK -- REPLACE FRONT SPEED SENSOR Removal