C1788

CIRCUIT DESCRIPTION
The high-side (battery) voltage for the CVRSS damper actuators is supplied to the Continuously Variable Road Sensing Suspension (CVRSS) control module through the CVRSS Damper Control Relay (RTD BODY) circuit. The Damper Control Relay circuit is controlled by the CVRSS module. The CVRSS control module monitors the relay drive circuit and each damper actuator high-side and low-side drive circuits for fault conditions.

CONDITIONS FOR SETTING THE DTC
The Diagnostic Trouble Code (DTC) is set when the CVRSS control module measures a feedback voltage greater than a preset threshold during a damper relay ON state. The DTC turns HISTORY when the CVRSS control module no longer senses a high feedback voltage during a damper relay ON state

ACTION TAKEN WHEN THE DTC SETS
^ ALL the damper actuators will be disabled by commanding 0 % Pulse Width Modulated (PWM) duty cycle. The vehicle ride will be soft.
^ The vehicle speed will be limited.
^ The SERVICE RIDE CONTROL message will be displayed.

CONDITIONS FOR CLEARING THE MIL/DTC
^ Use the scan tool.
^ Use the On-Board diagnostic CLEAR RSS CODES feature.

TEST DESCRIPTION
The number(s) below refer to the step number(s) on the diagnostic table.
1. This step checks for an internal open or short circuit condition in the coil of the relay.
2. This step checks for a short circuit to voltage condition on circuit 1112.
3. This step checks for intermittents.

IMPORTANT: Do not backprobe the sensors, actuators, or any sealed connectors.