Toyota Tundra. Manual — part 927
Fig. 40: Identifying Rear Speed Sensor - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1. READ VALUE USING TECHSTREAM (REAR SPEED SENSOR)
a. Connect the Techstream to the DLC3.
b. Turn the ignition switch to ON.
c. Select the Data List mode on the Techstream.
ABS/VSC/TRAC
DIAGNOSTIC NOTE TABLE
NOTE:
When replacing the VSC actuator assembly, perform zero point calibration
(See CALIBRATION ).
Check the speed sensor signal in test mode after cleaning or replacement
(See TEST MODE PROCEDURE ).
Tester Display
Measurement
Item/Range
Normal Condition
Diagnostic Note
RL Wheel Speed
Rear 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
Rear wheel speed sensor
Similar speed as
2009 Toyota Tundra
2009 BRAKES Brake Control - Tundra
d. 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.
HINT:
There is a tolerance of +/-10% in the speedometer indication.
NG: Go to step 4
OK: Go to next step
2. PERFORM TEST MODE INSPECTION (SIGNAL CHECK)
a. Perform a TEST MODE inspection and check for DTCs (See TEST MODE PROCEDURE ).
OK: No DTCs output.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (SPEED SENSOR CIRCUIT)
OK: Go to next step
3. RECONFIRM DTC
a. Clear the DTC (s) (See DTC CHECK/CLEAR ).
b. Start the engine.
c. Drive the vehicle at a speed of 20 km/h (12 mph) or more for at least 60 seconds.
d. Check if the same DTC (s) is output (See DTC CHECK/CLEAR ).
Result
RESULT TABLE
B: Go to step 10
A: USE SIMULATION METHOD TO CHECK (See HOW TO PROCEED WITH
TROUBLESHOOTING )
RR Wheel Speed
RH reading/min.: 0 km/h
(0 mph), max.: 326 km/h
(202 mph)
Actual wheel speed
indicated on
speedometer
Result
Proceed to
DTC is not output
A
DTC is output
B
2009 Toyota Tundra
2009 BRAKES Brake Control - Tundra
4. CHECK REAR SPEED SENSOR INSTALLATION
a. Check that the speed sensor installation bolt is tightened properly.
Torque: 11 N*m (107 kgf*cm, 8 ft.*lbf)
OK: The installation bolt is tightened properly.
Fig. 41: Identifying Speed Sensor Installation Bolt Clearance
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: TIGHTEN BOLT PROPERLY (See REMOVAL )
OK: Go to next step
5. CHECK REAR SPEED SENSOR
a. Visually check the speed sensor for deformation and damage.
OK: No deformation or damage.
There is no gap between the sensor and rear axle carrier.
NG: REPLACE REAR SPEED SENSOR (See REMOVAL )
OK: Go to next step
6. CHECK SPEED SENSOR TIP
a. Remove the speed sensor (See REMOVAL ).
b. Check the sensor tip.
OK: No scratches or foreign matter on the sensor tip.
NG: CLEAN OR REPLACE SPEED SENSOR (See REMOVAL )
OK: Go to next step
7. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - REAR SPEED SENSOR)
2009 Toyota Tundra
2009 BRAKES Brake Control - Tundra
a. Confirm that the skid control ECU connector and speed sensor connector are properly connected.
b. Disconnect the A17 ECU connector.
c. Disconnect the B3 and B4 sensor connectors.
d. Inspect both the connector case and the terminal for deformation and corrosion.
OK: No deformation or corrosion.
e. Measure the resistance according to the value(s) in the table below.
Standard Resistance: for RH
TESTER CONNECTION SPECIFIED CONDITION TABLE
Fig. 42: Identifying B3 And B4 Sensor Connectors And A17 ECU Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
for LH
TESTER CONNECTION SPECIFIED CONDITION TABLE
Tester Connection
Condition
Specified Condition
A17-36 (RR+) - B3-2 (RR+)
Always
Below 1 ohms
A17-37 (RR-) - B3-1 (RR-)
A17-36 (RR+) - Body ground
Always
10 kohms or higher
A17-37 (RR-) - Body ground
Tester Connection
Condition
Specified Condition
2009 Toyota Tundra
2009 BRAKES Brake Control - Tundra
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