DTC C0200/31: Front Speed Sensor RH Circuit; DTC C0205/32: Front Speed Sensor LH Circuit; DTC C1271/71: Low Output Signal of Front Speed Sensor RH (Test Mode DTC); DTC C1272/72: Low Output Signal of Front Speed Sensor LH (Test Mode DTC): Procedure

1. Using the Techstream, check for any momentary interruption in the wire harness and connector corresponding to a DTC. Refer to CHECK FOR INTERMITTENT PROBLEMS .
   ABS/VSC/TRAC:
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   FR Speed Open	FR speed sensor open detection / ERROR or NORMAL	ERROR: Momentary interruption NORMAL: Normal	-
   FL Speed Open	FL speed sensor open detection / ERROR or NORMAL	ERROR: Momentary interruption NORMAL: Normal	-

   OK

   There are no momentary interruptions

   HINT: 

   Perform the above inspection before removing the sensor and connector.

NG → See step   5 

OK: Go to next step 

1. Turn the ignition switch to OFF.
2. Connect the Techstream to the DLC3.
3. Start the engine.
4. Select the Data List mode on the Techstream. Refer to DATA LIST / ACTIVE TEST .
   ABS/VSC/TRAC:
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   FR Wheel Speed	FR wheel speed sensor reading / Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)	Actual wheel speed	Similar speed as indicated on speedometer
   FL Wheel Speed	FL wheel speed sensor reading /Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)	Actual wheel speed	Similar speed as indicated on speedometer

5. 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.

   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. Refer to ON-VEHICLE INSPECTION .

   OK

   The speed value output from the speed sensor displayed on the Techstream is the same as the actual vehicle speed measured using a speedometer tester (calibrated chassis dynamometer).

NG → See step   7 

OK: Go to next step 

1. Perform sensor check in Test Mode procedure. Refer to TEST MODE PROCEDURE .

   OK

   All Test Mode DTCs are erased.

NG → See step   7 

OK: Go to next step 

1. Clear the DTC. Refer to DTC CHECK / CLEAR .
2. Start the engine.
3. Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.
4. Check if the same DTC is recorded. Refer to DTC CHECK / CLEAR .

   Result

   Result	Proceed to
   DTC not output	A
   DTC output	B

B → See step   12 

A → See step   19 

1. Check if the skid control ECU and the front speed sensor connectors are securely connected.

NEXT: Go to next step 

1. Clear the DTC. Refer to DTC CHECK / CLEAR .
2. Start the engine.
3. Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.
4. Check if the same DTC is recorded. Refer to DTC CHECK / CLEAR .

   Result

   Result	Proceed to
   DTC output	A
   DTC not output	B

B → END 

A: Go to next step 

1. Turn the ignition switch to OFF.
   Fig 1: Identifying Clearance Between Sensor And Front Steering Knuckle

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the speed sensor installation.

   OK

   There is no clearance between the sensor and the front steering knuckle.

   The installation nut is tightened properly.

   Torque 

   8.5 N*m (87 kgf*cm, 75 in.*lbf)

NG → See step   16 

OK: Go to next step 

1. Remove the front speed sensor. Refer to REMOVAL .
2. Check the speed sensor tip.

   OK

   No scratches or foreign matter on the sensor tip.

   NOTE:

   Check the speed sensor signal after cleaning or replacement. Refer to TEST MODE PROCEDURE .

NG → CLEAN OR REPLACE FRONT SPEED SENSOR 

OK: Go to next step 

1. Install the front speed sensor.
   Fig 2: Inspecting Front Speed Sensor

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Make sure that there is no looseness at the locking part and the connecting part of the connectors.
3. Disconnect the front speed sensor connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   for RH 

   for LH 

   Tester Connection	Condition	Specified Condition
   2 (FR+) - Body ground	Always	10 kΩ or higher
   1 (FR-) - Body ground	Always	10 kΩ or higher

   Tester Connection	Condition	Specified Condition
   2 (FL+) - Body ground	Always	10 kΩ or higher
   1 (FL-) - Body ground	Always	10 kΩ or higher

   NOTE:

   Check the speed sensor signal after replacement. Refer to TEST MODE PROCEDURE .

NG → See step   18 

OK: Go to next step 

1. Disconnect the skid control ECU connector.
   Fig 3: Identifying Skid Control ECU And Front Speed Sensor Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   for RH 

   for LH 

   Tester Connection	Condition	Specified Condition
   A37-7 (FR+) - A22-2 (FR+)	Always	Below 1 Ω
   A37-7 (FR+) - Body ground	Always	10 kΩ or higher
   A37-6 (FR-) - A22-1 (FR-)	Always	Below 1 Ω
   A37-6 (FR-) - Body ground	Always	10 kΩ or higher

   Tester Connection	Condition	Specified Condition
   A37-19 (FL+) - A23-2 (FL+)	Always	Below 1 Ω
   A37-19 (FL+) - Body ground	Always	10 kΩ or higher
   A37-18 (FL-) - A23-1 (FL-)	Always	Below 1 Ω
   A37-18 (FL-) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Reconnect the skid control ECU connector.
   Fig 4: Identifying Skid Control ECU Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the ignition switch to ON.
3. Measure the voltage according to the value(s) in the table below.

   Standard voltage

   for RH 

   for LH 

   Tester Connection	Switch Condition	Specified Condition
   A22-2 (FR+) - Body ground	Ignition switch ON	8 to 14 V

   Tester Connection	Switch Condition	Specified Condition
   A23-2 (FL+) - Body ground	Ignition switch ON	8 to 14 V

NG → See step   17 

OK: Go to next step 

1. Turn the ignition switch to OFF.
2. Replace the front speed sensor. Refer to REMOVAL .
   NOTE:

   Check the speed sensor signal after cleaning or replacement. Refer to TEST MODE PROCEDURE .

NEXT: Go to next step 

1. Clear the DTC. Refer to DTC CHECK / CLEAR .
2. Start the engine.
3. Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.
4. Check if the same DTC is recorded. Refer to DTC CHECK / CLEAR .

   Result

   Result	Proceed to
   DTC output	A
   DTC not output	B

B → END 

A: Go to next step 

1. Turn the ignition switch to OFF.
2. Replace the front speed sensor rotor. Refer to REMOVAL .

   HINT: 

   The front speed sensor rotor is incorporated into the front axle hub sub-assembly.

   NOTE:

   Check the speed sensor signal after replacement. Refer to TEST MODE PROCEDURE .

NEXT: Go to next step 

1. Clear the DTC. Refer to DTC CHECK / CLEAR .
2. Start the engine.
3. Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.
4. Check if the same DTC is recorded. Refer to DTC CHECK / CLEAR .

   Result

   Result	Proceed to
   DTC not output	A
   DTC output	B

   HINT: 

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

B → See step   17 

A → END