Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VIVL
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 11/2017]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: C0226,C0236,C0246,C0256,C1225; SFR Solenoid Circuit; 2016 - 2017 MY Sienna [12/2015 - 11/2017]

DTC

C0226

SFR Solenoid Circuit

DTC

C0236

SFL Solenoid Circuit

DTC

C0246

SRR Solenoid Circuit

DTC

C0256

SRL Solenoid Circuit

DTC

C1225

SM Solenoid Circuit

DESCRIPTION

These solenoids turn on when signals are received from the skid control ECU and they control the pressure acting on the wheel cylinders to control the braking force.

DTC Code

DTC Detection Condition

Trouble Area

C0226

C0236

C0246

C0256

Open or short in the solenoid circuit continues for 0.05 seconds or more.

Brake actuator assembly

C1225

Any of the following is detected:

  1. While switching solenoid (SM1 or SM2) is ON, overcurrent continues for 0.15 seconds or more.
  2. While switching solenoid (SM1 or SM2) is OFF, an open circuit continues for 0.05 seconds or more.
  3. While switching solenoid (SM1 or SM2) is ON, an open circuit continues for 0.05 seconds or more.
  4. While switching solenoid (SM1 or SM2) is OFF, current continues to be applied for 0.1 seconds or more.
  5. Short to GND in the switching solenoid (SM1 or SM2) continues for 0.1 seconds or more.
  6. Switching solenoids SM1 and SM2 are shorted for 0.1 seconds or more.

Brake actuator assembly

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the brake actuator assembly, perform zero point calibration and store system information (See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: CALIBRATION ).
  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1.

RECONFIRM DTC

HINT:

These codes are detected when a problem is determined in the brake actuator assembly.

The solenoid circuits are in the brake actuator assembly.

Therefore, solenoid circuit inspection and solenoid unit inspection cannot be performed. Be sure to check if any DTCs are output before replacing the brake actuator assembly.

(a) Clear the DTCs (See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: DTC CHECK / CLEAR ).

(b) Start the engine.

(c) Drive the vehicle at a speed of 20 km/h (12 mph) or more for 30 seconds or more.

(d) Check if the same DTC is recorded (See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: DTC CHECK / CLEAR ).

Result

Result

Proceed to

DTCs (C0226, C0236, C0246, C0256 and C1225) are not output

A

DTCs (C0226, C0236, C0246, C0256 and/or C1225) are output

B

HINT:

  • If a speed signal of 6 km/h (4 mph) or more is input to the skid control ECU with the ignition switch to ON and the stop light switch off, the ECU performs self diagnosis of the motor and solenoid circuits.
  • If the normal system code is output (no trouble codes are output), slightly jiggle the connectors, wire harness, and fuses of the brake actuator assembly. Make sure that no DTCs are output.
  • If any DTCs are output while jiggling a connector or wire harness of the brake actuator assembly (skid control ECU), inspect and repair the connector or wire harness.
  • The DTCs were possibly output due to a bad connection of the connector terminal.
A

CHECK FOR INTERMITTENT PROBLEMS

(See page 2016 MY Sienna [12/2015 - 08/2016]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2017 MY Sienna [08/2016 - 11/2017]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING )

B

REPLACE BRAKE ACTUATOR ASSEMBLY