C1743

CIRCUIT DESCRIPTION
The CVRSS control module receives a vehicle speed signal from the Powertrain Control Module (PCM) via a discrete line and also receives vehicle speed data via the Class 2 communication link. The CVRSS module compares the vehicle speed received over Class 2 to the vehicle speed obtained directly from the PCM.

CONDITIONS FOR SETTING THE DTC
The DTC is set when the vehicle speed received over Class 2 is greater than 20 MPH while the vehicle speed obtained from the PCM is less than 3 MPH continuously for 10 seconds.

The DTC turns HISTORY when the CVRSS control module senses the vehicle speed signal from the PCM is greater than 5 MPH.

ACTION TAKEN WHEN THE DTC SETS
^ The CVRSS system will use only the Class 2 vehicle speed data. Otherwise, the CVRSS system will operate normally.
^ 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

IMPORTANT:
^ Do not backprobe the sensors, actuators, or any sealed connectors.
^ When all the diagnostics and repairs are complete, clear the DTCs and verify the operation.

The number(s) below refer to the step number(s) on the diagnostic table.
2. This step checks to see if the related PCM DTC is set.
4. This step checks for an open circuit condition in CKT 817.