Road Sensing Suspension (RSS)

CIRCUIT DESCRIPTION
The RSS module receives a vehicle speed signal from the Powertrain Control Module (PCM) and also receives vehicle speed data over the Universal Asynchronous Receiver Transmitter (UART) communication network. Once vehicle speed has been detected, the RSS module compares the vehicle speed received over UART to the RSS calculated vehicle speed obtained via the speed input signal from the PCM.

RS0043 WILL SET WHEN

IMPORTANT
Vehicle must be driven over 20 MPH for 10 seconds before code will set.

The RSS module's UART vehicle speed is greater than 20 MPH while the vehicle speed signal is less than 3 MPH continuously for 10 seconds.

ACTION TAKEN
Sets a code RS0043, displays the "SERVICE RIDE CONTROL" message, and only uses the vehicle speed data received over the UART network. If both speed signal inputs are not received by the RSS module for 10 seconds, the RSS module will command all four struts/shocks solenoids to lock in a full firm position.

RS0043 WILL GO "HISTORY" WHEN
The RSS module's speed signal is greater than 5 MPH.

NOTES ON FAULT TREE
1. Refer to Intermittents And Poor Connections. Diagnostic Aids
2. Refer to Clearing Diagnostic Trouble Codes. Clearing Diagnostic Trouble Codes

DIAGNOSTIC AIDS
An intermittent short to ground, open circuit, or short to voltage could cause an intermittent SSS assist condition and/or an intermittent firm ride condition.

History codes are used to help diagnose intermittent fault conditions and do not necessarily indicate a faulty RSS module. The RSS module itself is a reliable component and is not likely the cause of the malfunction. Most system complaints are linked to faulty wiring and connectors and, occasionally, components. Performing a thorough inspection of all related wiring and connectors pertaining to the history code stored will reduce diagnostic time and prevent unnecessary part replacement. If the problem is intermittent, try performing the tests shown while "wiggling" wiring and connectors. This can often cause the malfunction to appear. Check for poor connections at both the RSS module and the related components. These could cause an open, short, or an intermittent malfunction. Refer to Intermittents And Poor Connections. Diagnostic Aids

IMPORTANT
^ Do not backprobe sensors, dampers, electronic leveling control (ECL) connectors, or SSS connectors.
^ When all diagnosis and repairs are complete, clear codes and verify operation.