C0000

DTC C0000

Circuit Description
The power steering control module (PSCM) receives a vehicle speed message from the engine control module (ECM) via the class 2 serial data circuit. The PSCM uses this vehicle speed message, and other inputs, to determine the desired amount of steering assist.

DTC Descriptor
This diagnostic procedure supports the following DTC:

DTC C0000 - Vehicle Speed Information Circuit

Conditions for Running the DTC
^ The ignition is ON.
^ DTC U1300, U1301, or U2100 are not set.
^ Vehicle speed is greater than 8.1 km/h (5 mph).

Conditions for Setting the DTC
The PSCM receives an invalid, or no vehicle speed message from the ECM.

Action Taken When the DTC Sets
^ DTC C0000 is stored in memory.
^ The instrument panel cluster (IPC) message center displays the PWR STR warning message.
^ Steering assist level defaults to 120 km/h (74.5 mph) vehicle speed level of assist.

Conditions for Clearing the DTC
^ A current DTC will clear on the next malfunction free ignition cycle.
^ A history DTC will clear after 100 consecutive malfunction free ignition cycles.

Test Description

Step 1 - Step 3:

The numbers below refer to the step numbers on the diagnostic table.
2. Tests for the presence of vehicle speed related DTCs in the control modules where the vehicle speed message originates.