Road Sensing Suspension (RSS)

CIRCUIT DESCRIPTION
The RSS module receives a lift/dive signal from the Powertrain Control Module (PCM). When the lift/dive signal goes active (low), the RSS module reacts by switching all four damper solenoid valves to their firm position.

To make sure the lift/dive signal is valid, the RSS module requests the PCM to toggle the line low then high immediately following a vehicle crank.

CODE RS0044 WILL SET WHEN
The RSS module does not see the low-to-high transition within 31 seconds after an ignition "ON" (vehicle crank).

NOTE
The following conditions may cause code RS0044 to set intermittently:
^ PCM/RSS connectors are loose and ignition is keyed "ON."

ACTION TAKEN
The RSS module will log a RS0044 code and the lift/dive function will be disabled.

CODE RS0044 WILL GO "HISTORY" WHEN
The RSS module sees the PCM toggle the signal low then high. A retry is attempted every four minutes until successful.

NOTES ON FAULT TREE
1. Refer to Intermittents And Poor Connections.
Diagnostic Aids

2. An intermittent short to ground or an open on circuit 912 and/or 1490 may cause a random firm ride condition.
3. 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 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