C1650

CIRCUIT DESCRIPTION
The Continuously Variable Road Sensing Suspension (CVRSS) control module performs internal checks of all internal program and data memory spaces. Additionally, various internal functions and data communications are monitored for valid operation.

CONDITION FOR SETTING THE CODE "CURRENT"
Hardware faults internal to the CVRSS control module.

ACTIONS TAKEN WHEN CODE SETS
Depending upon which internal functions are affected by the fault condition, the CVRSS control module will take one of two sets of actions:
^ If the fault condition allows continued output operation, the system will enter a "Speed Dependent Damping" mode, in which all four corners of the vehicle are concurrently driven by a fixed PWM duty cycle, which increases as a function of vehicle speed.
^ If the fault is more severe, the control module will disable ALL dampers by commanding 0% PWM duty cycle, disabling the damper switched battery circuit, and sending a message to the Powertrain Control Module (PCM) to limit vehicle speed.

CONDITION FOR CODE TURNING "HISTORY"
The CVRSS control module no longer senses the hardware fault and the ignition is cycled OFF and ON.

HOW TO CLEAR THE CODE
^ Use the scan tool.
^ Use the On-Board diagnostic "CLEAR RSS CODES" feature.

TEST DESCRIPTION
The numbers below refer to step numbers on the diagnostic table.
2. Checks to see if fault condition is active or intermittent.
3. Checks to see if a "HISTORY" code C 1650 will return.
4. Checks to see if vehicle has a known intermittent problem.