DTC 81

CIRCUIT DESCRIPTION:
The steering sensor is fitted to the turn signal switch assembly and detects the steering rotating direction and angle. The sensor consists of a slit disc that rotates with the steering wheel as a unit, and a pair of photo interrupters. Each photo interrupter consists of an Light Emitting Diode (LED) and a photo transistor, located facing each other. It converts the change in the light irradiation between the two elements to the on/off signals. The slit disc rotates between the LED and the photo transistor of the pair of photo interrupters. As the steering wheel is operated, the slit disc rotates with the wheel as a unit and shuts and makes the light transmission between the two elements. The pair of photo interrupters have phases and the suspension ECU detects the steering direction and angle based on the changes of the each output.
And when it is judged that the steering wheel turning angle is large and the speed is greater than a set value, the ECU causes the damping force to increase.
When the steering angle signal is 36° or larger, code 81 is set. Inspect the ECU, steering sensor and the harness/connectors between the ECU steering sensor and body ground.