Right Rear Wheel Speed Sensor Signal (from 12/2010)
BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C0210/33,C0215/34,C1238/38,C1239/39,C1273/73,C1274/74,C1277/77,C1278/78: Right Rear Wheel Speed Sensor Signal Malfunction
C1278/78 - Abnormal Change in Output Signal of Rear Speed Sensor LH (Test Mode DTC)
DESCRIPTION
Refer to DTCs C0200/31, C0205/32, C1235/35 and C1236/36 Vehicle Stability Control System (from 12/2010).
DTCs C1273/73, C1274/74 C1277/77, and C1278/78 are output only in the Test Mode.
HINT
DTC C0210/33 and C1238/38 are for the right rear speed sensor.
DTC C0215/34 and C1239/39 are for the left rear speed sensor.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
When replacing the ABS & TRACTION actuator assembly, perform zero point calibration Calibration (from 12/2010).
HINT
Start the inspection from step 1 when using the Techstream and start from step 3 when not using the Techstream.
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 a 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 AND REPAIR HARNESS AND CONNECTOR (SPEED SENSOR CIRCUIT)
OK -- Continue to next step.
2. READ VALUE USING TECHSTREAM (REAR SPEED SENSOR)
(a) Connect the Techstream to the DLC3.
(b) Start the engine.
(c) Select the Data List mode on the Techstream.
ABS/VSC/TRAC
(d) 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.
OK:
The speed value output from the speed sensor displayed on the Techstream is the same as the actual vehicle speed.
NG -- INSPECT REAR SPEED SENSOR INSTALLATION
OK -- Continue to next step.
3. PERFORM TEST MODE (SIGNAL CHECK)
(a) Check if Test Mode DTCs are detected.
Result:
B -- INSPECT REAR SPEED SENSOR INSTALLATION
A -- Continue to next step.
4. INSPECT SPEED SENSOR AND SENSOR ROTOR SERRATIONS
(a) INSPECTION USING OSCILLOSCOPE
(1) Disconnect the rear speed sensor connector.
(2) Connect the oscilloscope to terminals 1 and 2 of the rear speed sensor.
(3) Check that a waveform is output when the tires are rotated.
OK:
A waveform as shown in the figure should be output.
HINT
* As vehicle speed (wheel rotation speed) increases, the width of the waveform narrows and the fluctuation in the output voltage becomes greater.
* When noise is identified in the waveform on the oscilloscope, error signals are generated due to rotor scratches, looseness or foreign matter attached to the speed sensor.
NG -- CLEAN OR REPLACE SPEED SENSOR AND SENSOR ROTOR
OK -- Continue to next step.
5. RECONFIRM DTC
(a) Clear the DTC DTC Check / Clear (from 12/2010).
(b) Start the engine.
(c) Drive the vehicle at the speed of 32 km/h (20 mph) or more for 60 seconds or more.
(d) Check that the same DTC is recorded DTC Check / Clear (from 12/2010).
Result:
HINT
* These DTCs may be stored due to a malfunction in the connector terminal connection, etc.
* 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 (from 12/2010).
B -- INSPECT REAR SPEED SENSOR INSTALLATION
A -- END
6. INSPECT REAR SPEED SENSOR INSTALLATION
(a) Check the rear speed sensor installation.
OK:
There is no clearance between the sensor and rear axle carrier.
NOTICE:
Check the speed sensor signal after replacement Test Mode Procedure (from 12/2010).
NG -- INSTALL REAR SPEED SENSOR CORRECTLY OR REPLACE REAR SPEED SENSOR
OK -- Continue to next step.
7. INSPECT REAR SPEED SENSOR
(a) Disconnect the rear speed sensor connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
LH
RH
NOTICE:
Check the speed sensor signal after replacement Test Mode Procedure (from 12/2010).
NG -- REPLACE REAR SPEED SENSOR
OK -- Continue to next step.
8. CHECK HARNESS AND CONNECTOR (REAR SPEED SENSOR TO SKID CONTROL ECU)
(a) SKID CONTROL ECU TO SKID CONTROL SENSOR WIRE
(1) Disconnect the skid control ECU connector and the rear speed sensor connector.
(2) Disconnect the skid control sensor wire.
(3) Measure the resistance according to the value(s) in the table below.
Standard resistance:
LH
RH
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (SKID CONTROL ECU TO SKID CONTROL SENSOR WIRE)
OK -- Continue to next step.
9. CHECK SKID CONTROL SENSOR WIRE
(a) SKID CONTROL SENSOR WIRE
(1) Measure the resistance according to the value(s) in the table below.
Standard resistance:
LH
RH
NG -- REPAIR OR REPLACE SKID CONTROL SENSOR WIRE
OK -- Continue to next step.
10. INSPECT SPEED SENSOR AND SENSOR ROTOR SERRATIONS
(a) INSPECTION USING OSCILLOSCOPE
(1) Disconnect the rear speed sensor connector.
(2) Connect the oscilloscope to terminals 1 and 2 of the rear speed sensor.
(3) Check that a waveform is output when the tires are rotated.
OK:
A waveforms as shown in the figure should be output.
HINT
* As vehicle speed (wheel rotation speed) increases, the width of the waveform narrows and the fluctuation in the output voltage becomes greater.
* When noise is identified in the waveform on the oscilloscope, error signals are generated due to rotor scratches, looseness or foreign matter attached to the speed sensor.
NG -- CLEAN OR REPLACE SPEED SENSOR AND SENSOR ROTOR
OK -- Continue to next step.
11. READ VALUE USING TECHSTREAM (REAR SPEED SENSOR)
(a) Connect the Techstream to the DLC3.
(b) Start the engine.
(c) Select the Data List mode on the Techstream.
ABS/VSC/TRAC
(d) 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.
OK:
The speed value output from the speed sensor displayed on the Techstream is the same as the actual vehicle speed.
HINT
These DTCs may be stored due to a malfunction in the connector terminal connection, etc.
NG -- REPLACE ABS & TRACTION ACTUATOR ASSEMBLY
OK -- END