Page 57 of 4500
Fig. 41: Diagnostic Trouble Code Information Chart (1 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Page 58 of 4500
Fig. 42: Diagnostic Trouble Code Information Chart (2 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
*1, *2:
Even after the troubled areas are repaired, ABS warning light w<004c004f004f00030051005200570003004a00520003005200490049000300580051004f00480056005600030057004b0048000300490052004f004f0052005a004c0051004a0003005200530048005500440057004c005200510056000300440055004800
03[
performed.
*1:
1. Drive the vehicle at 12 mph (20 km/h) for 30 seconds or more and check that the ABS warning
light goes off.
2. Clear the DTC (see DTC CHECK/CLEAR
).
Page 59 of 4500
*2:
1. Keep the vehicle in the stationary condition for 5 seconds or more and depress the brake pedal
lightly 2 or 3 times.
2. Drive the vehicle at the vehicle speed of 31 mph (50 km/h) and keep depressing the brake pedal
strongly for approximately 3 seconds.
3. Repeat the above operation 3 times or more and check that the ABS warning light goes off.
4. Clear the DTC (see DTC CHECK/CLEAR
).
HINT:
In some cases, the hand-held tester cannot be used when ABS warning light remains on.
DTC chart of VSC:
Fig. 43: DTC Information Chart Of VSC
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
HINT:
In some cases, the hand-held tester cannot be used when VSC warning light is always on.
Page 60 of 4500
CIRCUIT DESCRIPTION
The speed sensor detects wheel speed and sends the appropriate signals to the ECU. These signals are used to
control the ABS control system. The front and rear rotors have 48 serrations respectively.
When the rotors rotate, the magnetic field emitted by the permanent magnet in the speed sensor generates an
AC voltage. Since the frequency of this AC voltage changes in direct proportion to the speed of the rotor, the
frequenc
y is used by the ECU to detect the speed of each wheel.
Page 61 of 4500
Fig. 44: Right Front Speed Sensor Circuit Description
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Page 62 of 4500
Fig. 45: DTC C0200/31 And DTC C0205/32 Detecting Condition And Trouble Area
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
HINT:
DTC C0200/31 is for the right front speed sensor.
DTC C0205/32 is for the left front speed sensor.
WIRING DIAGRAM
Fig. 46: Right Front Speed Sensor Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)
a. Using the hand-held tester, check for any momentary interruption in the wire harness and connector
corresponding to a DTC (see CHECK FOR INTERMITTENT PROBLEMS
).
Page 63 of 4500

MEASUREMENT ITEM / RANGE DESCRIPTION
OK: Go to next step
There are no momentary interruptions.
HINT:
Perform the above inspection before removing the sensor and connector.
NG: Go to step 5
OK: Go to next step
2.READ VALUE OF HAND-HELD TESTER (FRONT SPEED SENSOR)
a. Connect the hand-held tester to the DLC3.
b. Start the engine.
c. Select the DATA LIST mode on the hand-held tester.
MEASUREMENT ITEM / RANGE DESCRIPTION
d. Check that there is no difference between the speed value output from the speed sensor displayed
on the hand-held tester and the speed value displayed on the speedometer when driving the vehicle.
OK: Go to next step
There is almost no difference from the displayed speed value.
HINT:
There is tolerance of 10 % in the speedometer indication.
NG: Go to step 4
ItemMeasurement Item / Range (Display)Normal Condition
SPD SEN FRFR speed sensor open detection / OPEN or
NORMALOPEN: Momentary interruption
SPD SEN FLFL speed sensor open detection / OPEN or
NORMALOPEN: Momentary interruption
ItemMeasurement Item / Range (Display)
Normal
Condition
WHEEL SPD FRWheel speed sensor (FR) reading / min.: 0 km/h (0 MPH,
max.: 326 km/h (202 MPH)Actual wheel
speed
WHEEL SPD FLWheel speed sensor (FL) reading / min.: 0 km/h (0 MPH,
max.: 326 km/h (202 MPH)Actual wheel
speed
Page 64 of 4500
OK: Go to next step
3.INSPECT SPEED SENSOR AND SENSOR ROTOR SERRATIONS
INSPECTION USING OSCILLOSCOPE
a. Connect the oscilloscope to terminal FR+ - FR- or FL+ - FL- of the skid control ECU.
b. Drive the vehicle at approximately 19 mph (30 km/h), and check the signal waveform.
OK: Go to next step
A waveform as shown in a figure should be output.
HINT:
As the vehicle speed (wheel revolution speed) increases, a cycle 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 the
speed sensor rotor's scratches, looseness or foreign matter attached to it.
NG: Go to step 7