Toyota Tundra. Manual — part 915

Fig. 21: Identifying ABS Warning Light - Blinking Pattern
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

c. Check the forward signal.

1. Drive the vehicle straight forward at a speed of 45 km/h (28 mph) or more for several

seconds and check that the ABS warning light goes off.

Fig. 22: Identifying Light Illumination Pattern - When Normal
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

d. Stop the vehicle.

NOTE:

The signal check may not be completed if the vehicle has its
wheels spun or the steering wheel is turned during this check.

NOTE:



The speed sensor signal check may not be completed if the

2009 Toyota Tundra

2009 BRAKES Brake Control - Tundra

HINT:

When the signal check has been completed, the ABS warning light turns off while driving and
blinks in the test mode pattern while stationary.

7. READ SIGNAL CHECK FUNCTION DTCs (WHEN USING TECHSTREAM)

a. Read the DTC(s) by following the instructions on the Techstream screen.

8. READ SENSOR SIGNAL CHECK FUNCTION DTCs (WHEN USING SST CHECK WIRE)

a. Using SST, connect terminals 4 (CG), 12 (TS) and 13 (TC) of the DLC3.

SST 09843-18040

Fig. 23: Identifying DLC3 Connector Terminal TS And CG
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b. Turn the ignition switch to ON.

c. Read the number of blinks of the ABS warning light.

HINT:

If all sensors are normal, a normal system code is output (the light comes on at 0.25 second
intervals).

d. After the check, disconnect SST from terminals 4 (CG), 12 (TS) and 13 (TC) of the DLC3.

e. Turn the ignition switch off.

speed sensor signal check is started while turning the steering
wheel or spinning the wheels.



If the signal check has not been completed, the ABS warning
light blinks while driving and the ABS system does not operate.

2009 Toyota Tundra

2009 BRAKES Brake Control - Tundra

Fig. 24: Identifying ABS Warning Light - Blinking Pattern
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

9. SENSOR SIGNAL CHECK FUNCTION DTCs

ABS sensor:

DTC TABLE

DTC Code

Diagnosis

Trouble Areas

C1271/71

Low output signal of front speed
sensor RH



Front speed sensor RH



Speed sensor circuit



Sensor installation

C1272/72

Low output signal of front speed
sensor LH



Front speed sensor LH



Speed sensor circuit



Sensor installation

C1273/73

Low output signal of rear speed
sensor RH



Rear speed sensor RH



Speed sensor circuit



Sensor installation

C1274/74

Low output signal of rear speed
sensor LH



Rear speed sensor LH



Speed sensor circuit



Sensor installation

C1275/75

Abnormal change in output signal
of front speed sensor RH



Sensor installation



Speed sensor rotor



Foreign matter on sensor tip
or sensor rotor

C1276/76

Abnormal change in output signal
of front speed sensor LH



Sensor installation



Speed sensor rotor



Foreign matter on sensor tip
or sensor rotor

Abnormal change in output signal



Sensor installation



Speed sensor rotor

2009 Toyota Tundra

2009 BRAKES Brake Control - Tundra

VSC sensor:

DTC TABLE

HINT:



The DTCs in this table are only output in test mode.



Detection of DTCs from C1271/71 to C1274/74 is completed before the vehicle speed reaches 5
km/h (3 mph).



Detection of DTCs from C1275/75 to C1278/78 is completed before the vehicle speed reaches 45
km/h (28 mph).



C1271/71 to C1274/74: Speed sensor output from only one wheel is extremely low despite the
other wheel speed outputs reaching 5 km/h (3 mph).



C1275/75 to C1278/78: Abnormal speed sensor output frequency is as shown below.

Fig. 25: Identifying Speed Sensor Frequency
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

PROBLEM SYMPTOMS TABLE

C1277/77

of rear speed sensor RH



Foreign matter on sensor tip
or sensor rotor

C1278/78

Abnormal change in output signal
of rear speed sensor LH



Sensor installation



Speed sensor rotor



Foreign matter on sensor tip
or sensor rotor

C1279/79

Deceleration sensor output
voltage malfunction



Yaw rate sensor and
deceleration sensor



Sensor installation

C1281/81

Master cylinder pressure sensor
output malfunction

Master cylinder pressure sensor

DTC No.

Diagnosis

Trouble Areas

C0371/71

Yaw rate sensor

Yaw rate sensor

2009 Toyota Tundra

2009 BRAKES Brake Control - Tundra