U1650

DTC 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
If equipped, the following actions occur:
- The EBCM disables the TCS/VSES and for the duration of the ignition cycle.
- A malfunction DTC will set.
- The Stability indicator turns on.

Conditions for Clearing the DTC
- The condition for the DTC is no longer present.
- Using a scan tool clear DTC function.
- The EBCM automatically clears the history DTC when a current DTC is not detected in 100 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.

DTC U1650 Step 1 - 8:

Test Description
The numbers refer to the step numbers 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.