U1650

Circuit Description
The Controller Area Network (CAN) serial data circuit is a high speed serial data bus used to communicate information between the steering angle sensor and the EBCM. When the ignition switch is turned to the ON position, the module and the steering angle sensor begin to transmit data between each other.
The CAN bus circuit is monitored continuously after the ignition switch is turned to the ON position.

Conditions for Running the DTC
^ The ignition is ON.
^ The vehicle speed is greater than 40 km/h (25 mph).

Conditions for Setting the DTC
Line interruptions are detected by CAN message monitor.

Action Taken When the DTC Sets
^ A malfunction DTC is set
^ TCS and VSES are disabled
^ TCS, SERVICE VEHICLE SOON and PCS lamp indicators turn on

Conditions for Clearing the DTC
^ The condition for the DTC is no longer present.
^ Using a scan tool.
^ The EBCM automatically clears the history DTC when a current DTC is not detected in 124 consecutive drive cycles.

Diagnostic Aids
Possible causes of this DTC are as follows:
^ CAN HI and CAN LO circuits shorted together.
^ CAN HI or CAN LO circuit shorted to ground.
^ CAN HI or CAN LO circuit shorted to voltage.

Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
2. Tests for a short to ground between the CAN HI and CAN LO circuits.
3. Tests the CAN HI and CAN LO circuits for a short together.
4. Checks to see if steering angle sensor is centered.