Electronic Suspension Control Module Scan Tool Information

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Electronic Suspension Control Module Scan Tool Data List

Scan Tool Parameter	System State	Expected Value	Definition
Operating Conditions: Turn the Ignition ON, Engine OFF/Vehicle Trim Height within Specifications
Battery Voltage Signal	-	B+	The scan tool displays 0-26.0 volts. The battery voltage represents the system voltage measured at the controller battery input.
LF Damper Actuator Command	-	0-90%	The scan tool displays 0-100%. This percentage represents the commanded state of the shock absorber solenoid. When the electronic suspension control (ESC) special functions is selected on the scan tool menu and the left front shock solenoid is commanded ON, the percentage will increase. When the left front shock solenoid is commanded OFF, the percentage will decrease.
LF Position Sensor	-	1.5-3.5 Volts	The scan tool displays 0-5.0 volts. The position sensor is a variable resistor which changes with vehicle trim height. The ESC system uses this voltage reading to determine different road and driving conditions. The ESC system adjusts the damping level in each shock absorber based upon the voltage level received back from all 4 position sensors.
LR Damper Actuator Command	-	0-90%	The scan tool displays 0-100%. This percentage represents the commanded state of the shock absorbers. When the ESC system commands the shock absorbers ON, the percentage will increase. When the ESC system commands the shock absorbers OFF, the percentage will decrease.
LR Position Sensor	-	1.5-3.5 Volts	The scan tool displays 0-5.0 volts. The position sensor is a variable resistor which changes with vehicle trim height. The ESC system uses this voltage reading to determine different road and driving conditions. The ESC system adjusts the damping level in each shock absorber based upon the voltage level received back from all 4 position sensors.
RF Damper Actuator Command	-	0-90%	The scan tool displays 0-100%. This percentage represents the commanded state of the shock absorber solenoid. When the ESC special functions is selected on the scan tool menu and the right front shock solenoid is commanded ON, the percentage will increase. When the right front shock solenoid is commanded OFF, the percentage will decrease.
RF Position Sensor	-	1.5-3.5 Volts	The scan tool displays 0-5.0 volts. The position sensor is a variable resistor which changes with vehicle trim height. The ESC system uses this voltage reading to determine different road and driving conditions. The ESC system adjusts the damping level in each shock absorber based upon the voltage level received back from all 4 position sensors.
RR Damper Actuator Command	-	0-90%	The scan tool displays 0-100%. This percentage represents the commanded state of the shock absorber solenoid. When the ESC special functions is selected on the scan tool menu and the right rear shock solenoid is commanded ON, the percentage will increase. When the right rear shock solenoid is commanded OFF, the percentage will decrease.
RR Position Sensor	-	1.5-3.5 Volts	The scan tool displays 0-5.0 volts. The position sensor is a variable resistor which changes with vehicle trim height. The ESC system uses this voltage reading to determine different road and driving conditions. The ESC system adjusts the damping level in each shock absorber based upon the voltage level received back from all 4 position sensors.
Vehicle Speed	-	Varies	The scan tool displays 0-255 km/h (0-159 mph). The ESC system obtains vehicle speed data from the powertrain control module (PCM) on a dedicated input. The PCM is responsible for calculating correct vehicle speed data.

Electronic Suspension Control Scan Tool Output

Scan Tool Output Control	Additional Menu Selection(s)	Description
LF Damper Actuator Command	-	Commands the left front shock solenoid ON and OFF.
LR Damper Actuator Command	-	Commands the left rear shock solenoid ON and OFF.
RF Damper Actuator Command	-	Commands the right front shock solenoid ON and OFF.
RR Damper Actuator Command	-	Commands the right rear shock solenoid ON and OFF.
Reset Diagnostic Counter	-	Commands the module to reset the internal ignition cycle counter. This enables the module to set DTCs immediately by bypassing the requirement to see the fault condition for 3 consecutive ignition cycles before a DTC is set. Once the ignition is cycled the ignition cycle count is re-enabled.