Road Sensing Suspension (RSS)

CIRCUIT DESCRIPTION
To produce a soft damper setting, the damper's drive line is switched to battery voltage to allow the valve to move to the open position. After this initial pull-in, the drive line is then pulse-width modulated (PWM) to hold the valve in the open state. Finally, the drive line is removed from battery voltage to place the valve into a closed position which produces a firm damper setting. The damper's soft and firm settings toggle based on various road conditions in order to provide optimal ride and handling.

The RSS control module monitors all four damper's solenoid drive and return lines during the "OFF," "ON," and PWM command.

RS0010 WILL SET WHEN
1. If the RSS control module senses the drive line high and the return line high for three consecutive samples during an "OFF" command plus senses the drive line low and the return line high for three consecutive samples during the 5 to 20 mS portion of the "ON" command, a code will set.
2. Or, if the RSS control module senses the drive line high and the return line low high for three consecutive samples during an "OFF" command, a code will set.
3. Or, if the RSS control module senses the drive line high and the return line high for three consecutive samples during a PWM command, a code will set.

ACTION TAKEN
Sets a RS0010, illuminates the "SERVICE RIDE CONTROL" message, and will continue driving the affected solenoid.

RS0010 WILL GO "HISTORY" WHEN
1. The RSS control module senses the drive line low and the return line high during the "OFF" and the PWM low state commands.
2. The RSS control module senses the drive line high and the return line low during PWM high state command.

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
History codes are used to help diagnose intermittent fault conditions and do not necessarily indicate a faulty RSS control module. The RSS control 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 control 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.