Safety Warning
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HOMESERVICE MANUALSTOYOTA2006SIENNA FWD V6-3.3L (3MZ-FE)REPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONMANUFACTURER CODE CHARTSDTC 31VEHICLE STABILITY CONTROL SYSTEMSTEERING ANGLE SENSOR CIRCUIT MALFUNCTION
2006 Toyota Sienna FWD V6-3.3L (3MZ-FE)
Steering Angle Sensor Circuit Malfunction
2006 Toyota Sienna FWD V6-3.3L (3MZ-FE)SECTION Steering Angle Sensor Circuit Malfunction
DTC C1231/31 Steering Angle Sensor Circuit Malfunction
DESCRIPTION
The steering angle sensor signal is sent to the skid control ECU through the CAN communication system. When there is a malfunction in the communication, it will be detected by the diagnosis function.
INSPECTION PROCEDURE
HINT:
- When U0121/94, U0123/62, U0124/95 or U0126/63 are output accompanied with C0120/36 or C1336/ 39, inspect and repair the trouble areas indicated by U0121/94, U0123/62, U0124/95 or U0126/63 first.
- When the speed sensor or the yaw rate sensor has trouble. DTCs for the steering angle sensor may be output even when the steering angle sensor is normal. When DTCs for the speed sensor or yaw rate sensor are output accompanied with other DTCs for the steering angle sensor, inspect and repair the speed sensor and yaw rate sensor first, and then inspect and repair the steering angle sensor.
DESCRIPTION
DTC Detection Condition:
The steering angle sensor signal is sent to the skid control ECU through the CAN communication system. When there is a malfunction in the communication, it will be detected by the diagnosis function.
Wiring Diagram:
Step 1:
INSPECTION PROCEDURE
HINT:
- When U0121/94, U0123/62, U0124/95 or U0126/63 are output accompanied with C0120/36 or C1336/ 39, inspect and repair the trouble areas indicated by U0121/94, U0123/62, U0124/95 or U0126/63 first.
- When the speed sensor or the yaw rate sensor has trouble. DTCs for the steering angle sensor may be output even when the steering angle sensor is normal. When DTCs for the speed sensor or yaw rate sensor are output accompanied with other DTCs for the steering angle sensor, inspect and repair the speed sensor and yaw rate sensor first, and then inspect and repair the steering angle sensor.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.