Toyota Tundra. Manual — part 928

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (SPEED SENSOR CIRCUIT)

OK: Go To Next Step

8. CHECK REAR SPEED SENSOR (INPUT VOLTAGE)

a. Reconnect the A17 ECU connector.

b. Disconnect the B3 and B4 sensor connectors.

c. Turn the ignition switch to ON.

d. Measure the voltage according to the value (s) in the table below.

Standard Voltage

TESTER CONNECTION SPECIFIED CONDITION TABLE

Fig. 43: Identifying B3 And B4 Sensor Connectors And A17 ECU Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPLACE VSC ACTUATOR ASSEMBLY (See REMOVAL )

OK: Go To Next Step

9. 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 ).

A17-43 (RL+) - B4-2 (RL+)

Always

Below 1 ohms

A17-42 (RL-) - B4-1 (RL-)

A17-43 (RL+) - Body ground

Always

10 kohms or higher

A17-42 (RL-) - Body ground

Tester Connection

Switch Condition

Specified Condition

B3-2 (RR+) - Body ground

Ignition switch ON

5.5 to 20 V

B4-2 (RL+) - Body ground

2009 Toyota Tundra

2009 BRAKES Brake Control - Tundra

Result

RESULT TABLE

B: USE SIMULATION METHOD TO CHECK (See HOW TO PROCEED WITH
TROUBLESHOOTING )

A: Go To Next Step

10. REPLACE REAR SPEED SENSOR

a. Replace the rear speed sensor (See REMOVAL ).

11. 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: END

A: REPLACE VSC ACTUATOR ASSEMBLY (See REMOVAL )

DTC C0226/21, C0236/22, C0246/23, C0256/24, C1225/25, C1226/26, C1227/27, C1228/28: SFR
SOLENOID CIRCUIT; SFL SOLENOID CIRCUIT; SRR SOLENOID CIRCUIT; SRL SOLENOID
CIRCUIT; SMC SOLENOID CIRCUIT; SRC SOLENOID CIRCUIT

DESCRIPTION

This solenoid is turned on in accordance with signals from the skid control ECU and controls the pressure on
the wheel cylinders to control the braking force.

DTC DETECTION CONDITION TABLE

Result

Proceed to

DTC is output

A

DTC is not output

B

Result

Proceed to

DTC is output

A

DTC is not output

B

DTC Code

DTC Detection Condition

Trouble Area

C0226/21
C0236/22

Open or short in solenoid circuit

Skid control ECU

2009 Toyota Tundra

2009 BRAKES Brake Control - Tundra

C0246/23
C0256/24

continues for 0.05 seconds or more.

C1225/25
C1226/26

C122727

C1228/28

When any of following conditions
detected:

1. During switching solenoid

(SMC1, SMC2, SRC1 or
SRC2) ON signal input,
overcurrent continues for
0.05 seconds or more.

2. During switching solenoid

(SMC1, SMC2, SRC1 or
SRC2) OFF signal input,
open circuit continues for
0.05 seconds or more.

3. During switching solenoid

(SMC1, SMC2, SRC1 or
SRC2) ON signal input, open
circuit continues for 0.01
seconds or more.

4. During switching solenoid

(SMC1, SMC2, SRC1 or
SRC2) OFF signal input,
current continues to be
applied for 0.1 seconds or
more.

5. Short to GND in switching

solenoid (SMC1, SMC2,
SRC1 or SRC2) continues for
0.1 seconds or more.

6. Switching solenoids (SMC1,

SMC2, SRC1 or SRC2)
shorted for 0.1 seconds or
more.

Skid control ECU

2009 Toyota Tundra

2009 BRAKES Brake Control - Tundra

Fig. 44: Identifying SFR Solenoid Circuit Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. RECONFIRM DTC

a. Clear the DTC (s) (See DTC CHECK/CLEAR ).

b. Start the engine.

NOTE:

When replacing the VSC actuator assembly, perform zero point calibration (See
CALIBRATION ).

2009 Toyota Tundra

2009 BRAKES Brake Control - Tundra