OBDII Code List

C1156 INFINITI - Speed Wheel Sensor Communication Circuit

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Faulty Steering Angle Sensor
  • Steering Angle Sensor harness is open or shorted
  • Steering Angle Sensor circuit poor electrical connection
  • Faulty ABS Actuator and Electric Unit (Control Unit)
  • CAN communication line

When is the code detected?

When steering angle sensor is not transmitting Control Area Network (CAN) communication signal to the ABS Actuator and Electric Unit (Control Unit).

Possible symptoms

  • Anti-Lock Brake System (ABS) Warning Light ON
  • Engine Light ON (or Service Engine Soon Warning Light)

C1156 Infiniti Description

The steering angle sensor is connected to the Anti-Lock Brake System (ABS) Actuator and Electric Unit (Control Unit) in addition to Control Area Network (CAN) lines. CAN is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.
OBDII Code C1156 Infiniti - Speed Wheel Sensor Communication Circuit -

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