Electronic Suspension Control Module Scan Tool Information. Chevrolet Chevy Suburban - 4WD 2009

GM Service Manual Online

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2009 🢒 Chevy Suburban - 4WD 🢒 Power and Signal Distribution 🢒 Data Communications 🢒 Electronic Suspension Control Module Scan Tool Information

Table 1:	Electronic Suspension Control Module Scan Tool Data List
Table 2:	Electronic Suspension Control Scan Tool Output

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.
Rear Leveling Air Pressure (If Equipped)	--	Varies	The scan tool displays volts. This is the current voltage monitored by the ESC module of the rear leveling air pressure.
Rear Leveling Air Pressure (If Equipped)	--	Varies	The scan tool displays kPa or psi. The scan tool displays the amount of rear air leveling pressure stored in the electronic suspension control module.
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	Description
ALC Trimset	Calibrates the adjustment of the height sensor
Compressor Test	Commands the air pressure of the shocks ON and OFF
Exhaust Valve	Commands the exhaust value ON and OFF. The engine must be running to use this control. Commands the exhaust value ON and OFF. The engine must be running to use this control.
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.