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 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 Sensor Open	Front speed sensor RH open detection / ERROR or NORMAL	ERROR: Momentary interruption NORMAL: Normal	-
   FL Speed Sensor Open	Front speed sensor LH 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 → REPAIR OR REPLACE HARNESS OR CONNECTOR (SPEED SENSOR CIRCUIT) 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch ON (READY).
3. Select the Data List mode on the Techstream.
4. Check that the speed value output from the speed sensor displayed on the Techstream and the speed value displayed on the speedometer are almost the same 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.

   ABS/VSC/TRAC:
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   FR Wheel Speed	Front wheel speed sensor RH 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	Front wheel speed sensor LH 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 the sensor signal conforms to the wheel direction.

   OK

   The wheel direction is displayed.

   ABS/VSC/TRAC:
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   FR Wheel Direction	Front wheel RH direction / FORWARD or BACK	FORWARD: Forward BACK: Back	-
   FL Wheel Direction	Front wheel LH direction / FORWARD or BACK	FORWARD: Forward BACK: Back	-

NG → See step   5 

OK: Go to next step 

1. Clear the DTC. Refer to DTC CHECK / CLEAR .
2. Perform sensor signal check in "TEST MODE PROCEDURE". Refer to TEST MODE PROCEDURE .

   OK

   All Test Mode DTCs are erased.

NG → See step   5 

OK: Go to next step 

1. Clear the DTC. Refer to DTC CHECK / CLEAR .
2. Turn the power switch ON (READY).
3. Drive the vehicle at a speed of 32 km/h (20 mph) or more for 60 seconds or more.
4. Check if the same DTCs are recorded. Refer to DTC CHECK / CLEAR .
   RESULT
   
   

   Result	Proceed to
   DTCs (C0200/31 and C0205/32) are not output	A
   DTCs (C0200/31 and C0205/32) are 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   11 

A → See step   17 

1. Check the sensor installation.
   Fig 1: Inspecting Rear Speed Sensor Installation

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK

   There is no clearance between the sensor and the front steering knuckle, and the installation bolt is tightened properly.

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

   NOTE:

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

NG → See step   15 

OK: Go to next step 

1. Remove the front speed sensor.
2. Check the sensor tip.

   OK

   No scratches or foreign matter on the sensor tip.

   NOTE:

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

NG → See step   18 

OK: Go to next step 

1. Disconnect the front speed sensor wire RH connectors (vehicle side: A55, sensor side: A).
   Fig 2: Identifying Front Speed Sensor Wire Connectors A55 And A91

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the front speed sensor wire LH connectors (vehicle side: A91, sensor side: A).
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   for RH 

   for LH 

   Tester Connection	Condition	Specified Condition
   "A"-2 (FR+) - A55-2	Always	Below 1 Ω
   "A"-2 (FR+) - A55-1	Always	10 kΩ or higher
   "A"-2 (FR+) - Body ground	Always	10 kΩ or higher
   "A"-1 (FR-) - A55-1	Always	Below 1 Ω
   "A"-1 (FR-) - A55-2	Always	10 kΩ or higher
   "A"-1 (FR-) - Body ground	Always	10 kΩ or higher

   Tester Connection	Condition	Specified Condition
   "A"-1 (FL+) - A91-1	Always	Below 1 Ω
   "A"-1 (FL+) - A91-2	Always	10 kΩ or higher
   "A"-1 (FL+) - Body ground	Always	10 kΩ or higher
   "A"-2 (FL-) - A91-2	Always	Below 1 Ω
   "A"-2 (FL-) - A91-1	Always	10 kΩ or higher
   "A"-2 (FL-) - Body ground	Always	10 kΩ or higher

   NOTE:

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

NG → See step   16 

OK: Go to next step 

1. Disconnect the A19 and A21 ECU connectors.
2. Disconnect the A55 sensor wire connector.
3. Disconnect the A91 sensor wire 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
   A19-16 (FR+) - A55-2	Always	Below 1 Ω
   A19-15 (FR-) - A55-1	Always	Below 1 Ω
   A19-16 (FR+) - Body ground	Always	10 kΩ or higher
   A19-15 (FR-) - Body ground	Always	10 kΩ or higher

   Tester Connection	Condition	Specified Condition
   A21-16 (FL+) - A91-1	Always	Below 1 Ω
   A21-15 (FL-) - A91-2	Always	Below 1 Ω
   A21-16 (FL+) - Body ground	Always	10 kΩ or higher
   A21-15 (FL-) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Reconnect the A19 and A21 ECU connectors.
   Fig 3: Identifying Front Speed Sensor Wire Connectors A55 And A91

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the A55 sensor wire connector.
3. Disconnect the A91 sensor wire connector.
4. Turn the power switch ON (IG).
5. Measure the voltage according to the value(s) in the table below.

   Standard voltage

   Tester Connection	Switch Condition	Specified Condition
   A55-2 - Body ground	Power switch ON (IG)	6.7 to 14 V
   A91-1 - Body ground	Power switch ON (IG)	6.7 to 14 V

NG → See step   14 

OK: Go to next step 

1. Clear the DTC. Refer to DTC CHECK / CLEAR .
2. Turn the power switch ON (READY).
3. Drive the vehicle at a speed of 32 km/h (20 mph) or more for 60 seconds or more.
4. Check if the same DTCs are recorded. Refer to DTC CHECK / CLEAR .

   HINT: 

   Reinstall the sensors, connectors, etc. and restore the vehicle to its prior condition before rechecking for DTCs.

   RESULT
   
   

   Result	Proceed to
   DTCs (C0200/31 and C0205/32) are output	A
   DTCs (C0200/31 and C0205/32) are not 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: Go to next step 

1. Replace the front speed sensor. Refer to REMOVAL .
   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. Turn the power switch ON (READY).
3. Drive the vehicle at a speed of 32 km/h (20 mph) or more for 60 seconds or more.
4. Check if the same DTCs are recorded. Refer to DTC CHECK / CLEAR .

   HINT: 

   Reinstall the sensors, connectors, etc. and restore the vehicle to its prior condition before rechecking for DTCs.

   RESULT
   
   

   Result	Proceed to
   DTCs (C0200/31 and C0205/32) are output	A
   DTCs (C0200/31 and C0205/32) are not 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 → END 

A: Go to next step 

1. Remove the front axle hub and bearing (speed sensor rotor). Refer to REMOVAL .
2. Check the sensor rotor.

   OK

   No scratches, oil, or foreign matter on the rotor.

   HINT: 

   If the sensor rotor is damaged, replace the front axle hub and bearing assembly.

   NOTE:

   • Do not use any kind of cleaner when cleaning the speed sensor rotor.
   • Check the speed sensor signal after cleaning/replacement. Refer to TEST MODE PROCEDURE .

NG → See step   19 

OK → See step   14